Lib/test/test_descr.py

   1 import __builtin__
   2 import sys
   3 import types
   4 import unittest
   5
   6 from copy import deepcopy
   7 from test import test_support
   8
   9
  10 class OperatorsTest(unittest.TestCase):
  11
  12     def __init__(self, *args, **kwargs):
  13         unittest.TestCase.__init__(self, *args, **kwargs)
  14         self.binops = {
  15             'add': '+',
  16             'sub': '-',
  17             'mul': '*',
  18             'div': '/',
  19             'divmod': 'divmod',
  20             'pow': '**',
  21             'lshift': '<<',
  22             'rshift': '>>',
  23             'and': '&',
  24             'xor': '^',
  25             'or': '|',
  26             'cmp': 'cmp',
  27             'lt': '<',
  28             'le': '<=',
  29             'eq': '==',
  30             'ne': '!=',
  31             'gt': '>',
  32             'ge': '>=',
  33         }
  34
  35         for name, expr in self.binops.items():
  36             if expr.islower():
  37                 expr = expr + "(a, b)"
  38             else:
  39                 expr = 'a %s b' % expr
  40             self.binops[name] = expr
  41
  42         self.unops = {
  43             'pos': '+',
  44             'neg': '-',
  45             'abs': 'abs',
  46             'invert': '~',
  47             'int': 'int',
  48             'long': 'long',
  49             'float': 'float',
  50             'oct': 'oct',
  51             'hex': 'hex',
  52         }
  53
  54         for name, expr in self.unops.items():
  55             if expr.islower():
  56                 expr = expr + "(a)"
  57             else:
  58                 expr = '%s a' % expr
  59             self.unops[name] = expr
  60
  61     def unop_test(self, a, res, expr="len(a)", meth="__len__"):
  62         d = {'a': a}
  63         self.assertEqual(eval(expr, d), res)
  64         t = type(a)
  65         m = getattr(t, meth)
  66
  67         # Find method in parent class
  68         while meth not in t.__dict__:
  69             t = t.__bases__[0]
  70         # in some implementations (e.g. PyPy), 'm' can be a regular unbound
  71         # method object; the getattr() below obtains its underlying function.
  72         self.assertEqual(getattr(m, 'im_func', m), t.__dict__[meth])
  73         self.assertEqual(m(a), res)
  74         bm = getattr(a, meth)
  75         self.assertEqual(bm(), res)
  76
  77     def binop_test(self, a, b, res, expr="a+b", meth="__add__"):
  78         d = {'a': a, 'b': b}
  79
  80         # XXX Hack so this passes before 2.3 when -Qnew is specified.
  81         if meth == "__div__" and 1/2 == 0.5:
  82             meth = "__truediv__"
  83
  84         if meth == '__divmod__': pass
  85
  86         self.assertEqual(eval(expr, d), res)
  87         t = type(a)
  88         m = getattr(t, meth)
  89         while meth not in t.__dict__:
  90             t = t.__bases__[0]
  91         # in some implementations (e.g. PyPy), 'm' can be a regular unbound
  92         # method object; the getattr() below obtains its underlying function.
  93         self.assertEqual(getattr(m, 'im_func', m), t.__dict__[meth])
  94         self.assertEqual(m(a, b), res)
  95         bm = getattr(a, meth)
  96         self.assertEqual(bm(b), res)
  97
  98     def ternop_test(self, a, b, c, res, expr="a[b:c]", meth="__getslice__"):
  99         d = {'a': a, 'b': b, 'c': c}
 100         self.assertEqual(eval(expr, d), res)
 101         t = type(a)
 102         m = getattr(t, meth)
 103         while meth not in t.__dict__:
 104             t = t.__bases__[0]
 105         # in some implementations (e.g. PyPy), 'm' can be a regular unbound
 106         # method object; the getattr() below obtains its underlying function.
 107         self.assertEqual(getattr(m, 'im_func', m), t.__dict__[meth])
 108         self.assertEqual(m(a, b, c), res)
 109         bm = getattr(a, meth)
 110         self.assertEqual(bm(b, c), res)
 111
 112     def setop_test(self, a, b, res, stmt="a+=b", meth="__iadd__"):
 113         d = {'a': deepcopy(a), 'b': b}
 114         exec stmt in d
 115         self.assertEqual(d['a'], res)
 116         t = type(a)
 117         m = getattr(t, meth)
 118         while meth not in t.__dict__:
 119             t = t.__bases__[0]
 120         # in some implementations (e.g. PyPy), 'm' can be a regular unbound
 121         # method object; the getattr() below obtains its underlying function.
 122         self.assertEqual(getattr(m, 'im_func', m), t.__dict__[meth])
 123         d['a'] = deepcopy(a)
 124         m(d['a'], b)
 125         self.assertEqual(d['a'], res)
 126         d['a'] = deepcopy(a)
 127         bm = getattr(d['a'], meth)
 128         bm(b)
 129         self.assertEqual(d['a'], res)
 130
 131     def set2op_test(self, a, b, c, res, stmt="a[b]=c", meth="__setitem__"):
 132         d = {'a': deepcopy(a), 'b': b, 'c': c}
 133         exec stmt in d
 134         self.assertEqual(d['a'], res)
 135         t = type(a)
 136         m = getattr(t, meth)
 137         while meth not in t.__dict__:
 138             t = t.__bases__[0]
 139         # in some implementations (e.g. PyPy), 'm' can be a regular unbound
 140         # method object; the getattr() below obtains its underlying function.
 141         self.assertEqual(getattr(m, 'im_func', m), t.__dict__[meth])
 142         d['a'] = deepcopy(a)
 143         m(d['a'], b, c)
 144         self.assertEqual(d['a'], res)
 145         d['a'] = deepcopy(a)
 146         bm = getattr(d['a'], meth)
 147         bm(b, c)
 148         self.assertEqual(d['a'], res)
 149
 150     def set3op_test(self, a, b, c, d, res, stmt="a[b:c]=d", meth="__setslice__"):
 151         dictionary = {'a': deepcopy(a), 'b': b, 'c': c, 'd': d}
 152         exec stmt in dictionary
 153         self.assertEqual(dictionary['a'], res)
 154         t = type(a)
 155         while meth not in t.__dict__:
 156             t = t.__bases__[0]
 157         m = getattr(t, meth)
 158         # in some implementations (e.g. PyPy), 'm' can be a regular unbound
 159         # method object; the getattr() below obtains its underlying function.
 160         self.assertEqual(getattr(m, 'im_func', m), t.__dict__[meth])
 161         dictionary['a'] = deepcopy(a)
 162         m(dictionary['a'], b, c, d)
 163         self.assertEqual(dictionary['a'], res)
 164         dictionary['a'] = deepcopy(a)
 165         bm = getattr(dictionary['a'], meth)
 166         bm(b, c, d)
 167         self.assertEqual(dictionary['a'], res)
 168
 169     def test_lists(self):
 170         # Testing list operations...
 171         # Asserts are within individual test methods
 172         self.binop_test([1], [2], [1,2], "a+b", "__add__")
 173         self.binop_test([1,2,3], 2, 1, "b in a", "__contains__")
 174         self.binop_test([1,2,3], 4, 0, "b in a", "__contains__")
 175         self.binop_test([1,2,3], 1, 2, "a[b]", "__getitem__")
 176         self.ternop_test([1,2,3], 0, 2, [1,2], "a[b:c]", "__getslice__")
 177         self.setop_test([1], [2], [1,2], "a+=b", "__iadd__")
 178         self.setop_test([1,2], 3, [1,2,1,2,1,2], "a*=b", "__imul__")
 179         self.unop_test([1,2,3], 3, "len(a)", "__len__")
 180         self.binop_test([1,2], 3, [1,2,1,2,1,2], "a*b", "__mul__")
 181         self.binop_test([1,2], 3, [1,2,1,2,1,2], "b*a", "__rmul__")
 182         self.set2op_test([1,2], 1, 3, [1,3], "a[b]=c", "__setitem__")
 183         self.set3op_test([1,2,3,4], 1, 3, [5,6], [1,5,6,4], "a[b:c]=d",
 184                         "__setslice__")
 185
 186     def test_dicts(self):
 187         # Testing dict operations...
 188         if hasattr(dict, '__cmp__'):   # PyPy has only rich comparison on dicts
 189             self.binop_test({1:2}, {2:1}, -1, "cmp(a,b)", "__cmp__")
 190         else:
 191             self.binop_test({1:2}, {2:1}, True, "a < b", "__lt__")
 192         self.binop_test({1:2,3:4}, 1, 1, "b in a", "__contains__")
 193         self.binop_test({1:2,3:4}, 2, 0, "b in a", "__contains__")
 194         self.binop_test({1:2,3:4}, 1, 2, "a[b]", "__getitem__")
 195
 196         d = {1:2, 3:4}
 197         l1 = []
 198         for i in d.keys():
 199             l1.append(i)
 200         l = []
 201         for i in iter(d):
 202             l.append(i)
 203         self.assertEqual(l, l1)
 204         l = []
 205         for i in d.__iter__():
 206             l.append(i)
 207         self.assertEqual(l, l1)
 208         l = []
 209         for i in dict.__iter__(d):
 210             l.append(i)
 211         self.assertEqual(l, l1)
 212         d = {1:2, 3:4}
 213         self.unop_test(d, 2, "len(a)", "__len__")
 214         self.assertEqual(eval(repr(d), {}), d)
 215         self.assertEqual(eval(d.__repr__(), {}), d)
 216         self.set2op_test({1:2,3:4}, 2, 3, {1:2,2:3,3:4}, "a[b]=c",
 217                         "__setitem__")
 218
 219     # Tests for unary and binary operators
 220     def number_operators(self, a, b, skip=[]):
 221         dict = {'a': a, 'b': b}
 222
 223         for name, expr in self.binops.items():
 224             if name not in skip:
 225                 name = "__%s__" % name
 226                 if hasattr(a, name):
 227                     res = eval(expr, dict)
 228                     self.binop_test(a, b, res, expr, name)
 229
 230         for name, expr in self.unops.items():
 231             if name not in skip:
 232                 name = "__%s__" % name
 233                 if hasattr(a, name):
 234                     res = eval(expr, dict)
 235                     self.unop_test(a, res, expr, name)
 236
 237     def test_ints(self):
 238         # Testing int operations...
 239         self.number_operators(100, 3)
 240         # The following crashes in Python 2.2
 241         self.assertEqual((1).__nonzero__(), 1)
 242         self.assertEqual((0).__nonzero__(), 0)
 243         # This returns 'NotImplemented' in Python 2.2
 244         class C(int):
 245             def __add__(self, other):
 246                 return NotImplemented
 247         self.assertEqual(C(5L), 5)
 248         try:
 249             C() + ""
 250         except TypeError:
 251             pass
 252         else:
 253             self.fail("NotImplemented should have caused TypeError")
 254         try:
 255             C(sys.maxint+1)
 256         except OverflowError:
 257             pass
 258         else:
 259             self.fail("should have raised OverflowError")
 260
 261     def test_longs(self):
 262         # Testing long operations...
 263         self.number_operators(100L, 3L)
 264
 265     def test_floats(self):
 266         # Testing float operations...
 267         self.number_operators(100.0, 3.0)
 268
 269     def test_complexes(self):
 270         # Testing complex operations...
 271         self.number_operators(100.0j, 3.0j, skip=['lt', 'le', 'gt', 'ge',
 272                                                   'int', 'long', 'float'])
 273
 274         class Number(complex):
 275             __slots__ = ['prec']
 276             def __new__(cls, *args, **kwds):
 277                 result = complex.__new__(cls, *args)
 278                 result.prec = kwds.get('prec', 12)
 279                 return result
 280             def __repr__(self):
 281                 prec = self.prec
 282                 if self.imag == 0.0:
 283                     return "%.*g" % (prec, self.real)
 284                 if self.real == 0.0:
 285                     return "%.*gj" % (prec, self.imag)
 286                 return "(%.*g+%.*gj)" % (prec, self.real, prec, self.imag)
 287             __str__ = __repr__
 288
 289         a = Number(3.14, prec=6)
 290         self.assertEqual(repr(a), "3.14")
 291         self.assertEqual(a.prec, 6)
 292
 293         a = Number(a, prec=2)
 294         self.assertEqual(repr(a), "3.1")
 295         self.assertEqual(a.prec, 2)
 296
 297         a = Number(234.5)
 298         self.assertEqual(repr(a), "234.5")
 299         self.assertEqual(a.prec, 12)
 300
 301     @test_support.impl_detail("the module 'xxsubtype' is internal")
 302     def test_spam_lists(self):
 303         # Testing spamlist operations...
 304         import copy, xxsubtype as spam
 305
 306         def spamlist(l, memo=None):
 307             import xxsubtype as spam
 308             return spam.spamlist(l)
 309
 310         # This is an ugly hack:
 311         copy._deepcopy_dispatch[spam.spamlist] = spamlist
 312
 313         self.binop_test(spamlist([1]), spamlist([2]), spamlist([1,2]), "a+b",
 314                        "__add__")
 315         self.binop_test(spamlist([1,2,3]), 2, 1, "b in a", "__contains__")
 316         self.binop_test(spamlist([1,2,3]), 4, 0, "b in a", "__contains__")
 317         self.binop_test(spamlist([1,2,3]), 1, 2, "a[b]", "__getitem__")
 318         self.ternop_test(spamlist([1,2,3]), 0, 2, spamlist([1,2]), "a[b:c]",
 319                         "__getslice__")
 320         self.setop_test(spamlist([1]), spamlist([2]), spamlist([1,2]), "a+=b",
 321                        "__iadd__")
 322         self.setop_test(spamlist([1,2]), 3, spamlist([1,2,1,2,1,2]), "a*=b",
 323                        "__imul__")
 324         self.unop_test(spamlist([1,2,3]), 3, "len(a)", "__len__")
 325         self.binop_test(spamlist([1,2]), 3, spamlist([1,2,1,2,1,2]), "a*b",
 326                        "__mul__")
 327         self.binop_test(spamlist([1,2]), 3, spamlist([1,2,1,2,1,2]), "b*a",
 328                        "__rmul__")
 329         self.set2op_test(spamlist([1,2]), 1, 3, spamlist([1,3]), "a[b]=c",
 330                         "__setitem__")
 331         self.set3op_test(spamlist([1,2,3,4]), 1, 3, spamlist([5,6]),
 332                    spamlist([1,5,6,4]), "a[b:c]=d", "__setslice__")
 333         # Test subclassing
 334         class C(spam.spamlist):
 335             def foo(self): return 1
 336         a = C()
 337         self.assertEqual(a, [])
 338         self.assertEqual(a.foo(), 1)
 339         a.append(100)
 340         self.assertEqual(a, [100])
 341         self.assertEqual(a.getstate(), 0)
 342         a.setstate(42)
 343         self.assertEqual(a.getstate(), 42)
 344
 345     @test_support.impl_detail("the module 'xxsubtype' is internal")
 346     def test_spam_dicts(self):
 347         # Testing spamdict operations...
 348         import copy, xxsubtype as spam
 349         def spamdict(d, memo=None):
 350             import xxsubtype as spam
 351             sd = spam.spamdict()
 352             for k, v in d.items():
 353                 sd[k] = v
 354             return sd
 355         # This is an ugly hack:
 356         copy._deepcopy_dispatch[spam.spamdict] = spamdict
 357
 358         self.binop_test(spamdict({1:2}), spamdict({2:1}), -1, "cmp(a,b)",
 359                        "__cmp__")
 360         self.binop_test(spamdict({1:2,3:4}), 1, 1, "b in a", "__contains__")
 361         self.binop_test(spamdict({1:2,3:4}), 2, 0, "b in a", "__contains__")
 362         self.binop_test(spamdict({1:2,3:4}), 1, 2, "a[b]", "__getitem__")
 363         d = spamdict({1:2,3:4})
 364         l1 = []
 365         for i in d.keys():
 366             l1.append(i)
 367         l = []
 368         for i in iter(d):
 369             l.append(i)
 370         self.assertEqual(l, l1)
 371         l = []
 372         for i in d.__iter__():
 373             l.append(i)
 374         self.assertEqual(l, l1)
 375         l = []
 376         for i in type(spamdict({})).__iter__(d):
 377             l.append(i)
 378         self.assertEqual(l, l1)
 379         straightd = {1:2, 3:4}
 380         spamd = spamdict(straightd)
 381         self.unop_test(spamd, 2, "len(a)", "__len__")
 382         self.unop_test(spamd, repr(straightd), "repr(a)", "__repr__")
 383         self.set2op_test(spamdict({1:2,3:4}), 2, 3, spamdict({1:2,2:3,3:4}),
 384                    "a[b]=c", "__setitem__")
 385         # Test subclassing
 386         class C(spam.spamdict):
 387             def foo(self): return 1
 388         a = C()
 389         self.assertEqual(a.items(), [])
 390         self.assertEqual(a.foo(), 1)
 391         a['foo'] = 'bar'
 392         self.assertEqual(a.items(), [('foo', 'bar')])
 393         self.assertEqual(a.getstate(), 0)
 394         a.setstate(100)
 395         self.assertEqual(a.getstate(), 100)
 396
 397 class ClassPropertiesAndMethods(unittest.TestCase):
 398
 399     def test_python_dicts(self):
 400         # Testing Python subclass of dict...
 401         self.assertTrue(issubclass(dict, dict))
 402         self.assertIsInstance({}, dict)
 403         d = dict()
 404         self.assertEqual(d, {})
 405         self.assertTrue(d.__class__ is dict)
 406         self.assertIsInstance(d, dict)
 407         class C(dict):
 408             state = -1
 409             def __init__(self_local, *a, **kw):
 410                 if a:
 411                     self.assertEqual(len(a), 1)
 412                     self_local.state = a[0]
 413                 if kw:
 414                     for k, v in kw.items():
 415                         self_local[v] = k
 416             def __getitem__(self, key):
 417                 return self.get(key, 0)
 418             def __setitem__(self_local, key, value):
 419                 self.assertIsInstance(key, type(0))
 420                 dict.__setitem__(self_local, key, value)
 421             def setstate(self, state):
 422                 self.state = state
 423             def getstate(self):
 424                 return self.state
 425         self.assertTrue(issubclass(C, dict))
 426         a1 = C(12)
 427         self.assertEqual(a1.state, 12)
 428         a2 = C(foo=1, bar=2)
 429         self.assertEqual(a2[1] == 'foo' and a2[2], 'bar')
 430         a = C()
 431         self.assertEqual(a.state, -1)
 432         self.assertEqual(a.getstate(), -1)
 433         a.setstate(0)
 434         self.assertEqual(a.state, 0)
 435         self.assertEqual(a.getstate(), 0)
 436         a.setstate(10)
 437         self.assertEqual(a.state, 10)
 438         self.assertEqual(a.getstate(), 10)
 439         self.assertEqual(a[42], 0)
 440         a[42] = 24
 441         self.assertEqual(a[42], 24)
 442         N = 50
 443         for i in range(N):
 444             a[i] = C()
 445             for j in range(N):
 446                 a[i][j] = i*j
 447         for i in range(N):
 448             for j in range(N):
 449                 self.assertEqual(a[i][j], i*j)
 450
 451     def test_python_lists(self):
 452         # Testing Python subclass of list...
 453         class C(list):
 454             def __getitem__(self, i):
 455                 return list.__getitem__(self, i) + 100
 456             def __getslice__(self, i, j):
 457                 return (i, j)
 458         a = C()
 459         a.extend([0,1,2])
 460         self.assertEqual(a[0], 100)
 461         self.assertEqual(a[1], 101)
 462         self.assertEqual(a[2], 102)
 463         self.assertEqual(a[100:200], (100,200))
 464
 465     def test_metaclass(self):
 466         # Testing __metaclass__...
 467         class C:
 468             __metaclass__ = type
 469             def __init__(self):
 470                 self.__state = 0
 471             def getstate(self):
 472                 return self.__state
 473             def setstate(self, state):
 474                 self.__state = state
 475         a = C()
 476         self.assertEqual(a.getstate(), 0)
 477         a.setstate(10)
 478         self.assertEqual(a.getstate(), 10)
 479         class D:
 480             class __metaclass__(type):
 481                 def myself(cls): return cls
 482         self.assertEqual(D.myself(), D)
 483         d = D()
 484         self.assertEqual(d.__class__, D)
 485         class M1(type):
 486             def __new__(cls, name, bases, dict):
 487                 dict['__spam__'] = 1
 488                 return type.__new__(cls, name, bases, dict)
 489         class C:
 490             __metaclass__ = M1
 491         self.assertEqual(C.__spam__, 1)
 492         c = C()
 493         self.assertEqual(c.__spam__, 1)
 494
 495         class _instance(object):
 496             pass
 497         class M2(object):
 498             @staticmethod
 499             def __new__(cls, name, bases, dict):
 500                 self = object.__new__(cls)
 501                 self.name = name
 502                 self.bases = bases
 503                 self.dict = dict
 504                 return self
 505             def __call__(self):
 506                 it = _instance()
 507                 # Early binding of methods
 508                 for key in self.dict:
 509                     if key.startswith("__"):
 510                         continue
 511                     setattr(it, key, self.dict[key].__get__(it, self))
 512                 return it
 513         class C:
 514             __metaclass__ = M2
 515             def spam(self):
 516                 return 42
 517         self.assertEqual(C.name, 'C')
 518         self.assertEqual(C.bases, ())
 519         self.assertIn('spam', C.dict)
 520         c = C()
 521         self.assertEqual(c.spam(), 42)
 522
 523         # More metaclass examples
 524
 525         class autosuper(type):
 526             # Automatically add __super to the class
 527             # This trick only works for dynamic classes
 528             def __new__(metaclass, name, bases, dict):
 529                 cls = super(autosuper, metaclass).__new__(metaclass,
 530                                                           name, bases, dict)
 531                 # Name mangling for __super removes leading underscores
 532                 while name[:1] == "_":
 533                     name = name[1:]
 534                 if name:
 535                     name = "_%s__super" % name
 536                 else:
 537                     name = "__super"
 538                 setattr(cls, name, super(cls))
 539                 return cls
 540         class A:
 541             __metaclass__ = autosuper
 542             def meth(self):
 543                 return "A"
 544         class B(A):
 545             def meth(self):
 546                 return "B" + self.__super.meth()
 547         class C(A):
 548             def meth(self):
 549                 return "C" + self.__super.meth()
 550         class D(C, B):
 551             def meth(self):
 552                 return "D" + self.__super.meth()
 553         self.assertEqual(D().meth(), "DCBA")
 554         class E(B, C):
 555             def meth(self):
 556                 return "E" + self.__super.meth()
 557         self.assertEqual(E().meth(), "EBCA")
 558
 559         class autoproperty(type):
 560             # Automatically create property attributes when methods
 561             # named _get_x and/or _set_x are found
 562             def __new__(metaclass, name, bases, dict):
 563                 hits = {}
 564                 for key, val in dict.iteritems():
 565                     if key.startswith("_get_"):
 566                         key = key[5:]
 567                         get, set = hits.get(key, (None, None))
 568                         get = val
 569                         hits[key] = get, set
 570                     elif key.startswith("_set_"):
 571                         key = key[5:]
 572                         get, set = hits.get(key, (None, None))
 573                         set = val
 574                         hits[key] = get, set
 575                 for key, (get, set) in hits.iteritems():
 576                     dict[key] = property(get, set)
 577                 return super(autoproperty, metaclass).__new__(metaclass,
 578                                                             name, bases, dict)
 579         class A:
 580             __metaclass__ = autoproperty
 581             def _get_x(self):
 582                 return -self.__x
 583             def _set_x(self, x):
 584                 self.__x = -x
 585         a = A()
 586         self.assertTrue(not hasattr(a, "x"))
 587         a.x = 12
 588         self.assertEqual(a.x, 12)
 589         self.assertEqual(a._A__x, -12)
 590
 591         class multimetaclass(autoproperty, autosuper):
 592             # Merge of multiple cooperating metaclasses
 593             pass
 594         class A:
 595             __metaclass__ = multimetaclass
 596             def _get_x(self):
 597                 return "A"
 598         class B(A):
 599             def _get_x(self):
 600                 return "B" + self.__super._get_x()
 601         class C(A):
 602             def _get_x(self):
 603                 return "C" + self.__super._get_x()
 604         class D(C, B):
 605             def _get_x(self):
 606                 return "D" + self.__super._get_x()
 607         self.assertEqual(D().x, "DCBA")
 608
 609         # Make sure type(x) doesn't call x.__class__.__init__
 610         class T(type):
 611             counter = 0
 612             def __init__(self, *args):
 613                 T.counter += 1
 614         class C:
 615             __metaclass__ = T
 616         self.assertEqual(T.counter, 1)
 617         a = C()
 618         self.assertEqual(type(a), C)
 619         self.assertEqual(T.counter, 1)
 620
 621         class C(object): pass
 622         c = C()
 623         try: c()
 624         except TypeError: pass
 625         else: self.fail("calling object w/o call method should raise "
 626                         "TypeError")
 627
 628         # Testing code to find most derived baseclass
 629         class A(type):
 630             def __new__(*args, **kwargs):
 631                 return type.__new__(*args, **kwargs)
 632
 633         class B(object):
 634             pass
 635
 636         class C(object):
 637             __metaclass__ = A
 638
 639         # The most derived metaclass of D is A rather than type.
 640         class D(B, C):
 641             pass
 642
 643     def test_module_subclasses(self):
 644         # Testing Python subclass of module...
 645         log = []
 646         MT = type(sys)
 647         class MM(MT):
 648             def __init__(self, name):
 649                 MT.__init__(self, name)
 650             def __getattribute__(self, name):
 651                 log.append(("getattr", name))
 652                 return MT.__getattribute__(self, name)
 653             def __setattr__(self, name, value):
 654                 log.append(("setattr", name, value))
 655                 MT.__setattr__(self, name, value)
 656             def __delattr__(self, name):
 657                 log.append(("delattr", name))
 658                 MT.__delattr__(self, name)
 659         a = MM("a")
 660         a.foo = 12
 661         x = a.foo
 662         del a.foo
 663         self.assertEqual(log, [("setattr", "foo", 12),
 664                                ("getattr", "foo"),
 665                                ("delattr", "foo")])
 666
 667         # http://python.org/sf/1174712
 668         try:
 669             class Module(types.ModuleType, str):
 670                 pass
 671         except TypeError:
 672             pass
 673         else:
 674             self.fail("inheriting from ModuleType and str at the same time "
 675                       "should fail")
 676
 677     def test_multiple_inheritence(self):
 678         # Testing multiple inheritance...
 679         class C(object):
 680             def __init__(self):
 681                 self.__state = 0
 682             def getstate(self):
 683                 return self.__state
 684             def setstate(self, state):
 685                 self.__state = state
 686         a = C()
 687         self.assertEqual(a.getstate(), 0)
 688         a.setstate(10)
 689         self.assertEqual(a.getstate(), 10)
 690         class D(dict, C):
 691             def __init__(self):
 692                 type({}).__init__(self)
 693                 C.__init__(self)
 694         d = D()
 695         self.assertEqual(d.keys(), [])
 696         d["hello"] = "world"
 697         self.assertEqual(d.items(), [("hello", "world")])
 698         self.assertEqual(d["hello"], "world")
 699         self.assertEqual(d.getstate(), 0)
 700         d.setstate(10)
 701         self.assertEqual(d.getstate(), 10)
 702         self.assertEqual(D.__mro__, (D, dict, C, object))
 703
 704         # SF bug #442833
 705         class Node(object):
 706             def __int__(self):
 707                 return int(self.foo())
 708             def foo(self):
 709                 return "23"
 710         class Frag(Node, list):
 711             def foo(self):
 712                 return "42"
 713         self.assertEqual(Node().__int__(), 23)
 714         self.assertEqual(int(Node()), 23)
 715         self.assertEqual(Frag().__int__(), 42)
 716         self.assertEqual(int(Frag()), 42)
 717
 718         # MI mixing classic and new-style classes.
 719
 720         class A:
 721             x = 1
 722
 723         class B(A):
 724             pass
 725
 726         class C(A):
 727             x = 2
 728
 729         class D(B, C):
 730             pass
 731         self.assertEqual(D.x, 1)
 732
 733         # Classic MRO is preserved for a classic base class.
 734         class E(D, object):
 735             pass
 736         self.assertEqual(E.__mro__, (E, D, B, A, C, object))
 737         self.assertEqual(E.x, 1)
 738
 739         # But with a mix of classic bases, their MROs are combined using
 740         # new-style MRO.
 741         class F(B, C, object):
 742             pass
 743         self.assertEqual(F.__mro__, (F, B, C, A, object))
 744         self.assertEqual(F.x, 2)
 745
 746         # Try something else.
 747         class C:
 748             def cmethod(self):
 749                 return "C a"
 750             def all_method(self):
 751                 return "C b"
 752
 753         class M1(C, object):
 754             def m1method(self):
 755                 return "M1 a"
 756             def all_method(self):
 757                 return "M1 b"
 758
 759         self.assertEqual(M1.__mro__, (M1, C, object))
 760         m = M1()
 761         self.assertEqual(m.cmethod(), "C a")
 762         self.assertEqual(m.m1method(), "M1 a")
 763         self.assertEqual(m.all_method(), "M1 b")
 764
 765         class D(C):
 766             def dmethod(self):
 767                 return "D a"
 768             def all_method(self):
 769                 return "D b"
 770
 771         class M2(D, object):
 772             def m2method(self):
 773                 return "M2 a"
 774             def all_method(self):
 775                 return "M2 b"
 776
 777         self.assertEqual(M2.__mro__, (M2, D, C, object))
 778         m = M2()
 779         self.assertEqual(m.cmethod(), "C a")
 780         self.assertEqual(m.dmethod(), "D a")
 781         self.assertEqual(m.m2method(), "M2 a")
 782         self.assertEqual(m.all_method(), "M2 b")
 783
 784         class M3(M1, M2, object):
 785             def m3method(self):
 786                 return "M3 a"
 787             def all_method(self):
 788                 return "M3 b"
 789         self.assertEqual(M3.__mro__, (M3, M1, M2, D, C, object))
 790         m = M3()
 791         self.assertEqual(m.cmethod(), "C a")
 792         self.assertEqual(m.dmethod(), "D a")
 793         self.assertEqual(m.m1method(), "M1 a")
 794         self.assertEqual(m.m2method(), "M2 a")
 795         self.assertEqual(m.m3method(), "M3 a")
 796         self.assertEqual(m.all_method(), "M3 b")
 797
 798         class Classic:
 799             pass
 800         try:
 801             class New(Classic):
 802                 __metaclass__ = type
 803         except TypeError:
 804             pass
 805         else:
 806             self.fail("new class with only classic bases - shouldn't be")
 807
 808     def test_diamond_inheritence(self):
 809         # Testing multiple inheritance special cases...
 810         class A(object):
 811             def spam(self): return "A"
 812         self.assertEqual(A().spam(), "A")
 813         class B(A):
 814             def boo(self): return "B"
 815             def spam(self): return "B"
 816         self.assertEqual(B().spam(), "B")
 817         self.assertEqual(B().boo(), "B")
 818         class C(A):
 819             def boo(self): return "C"
 820         self.assertEqual(C().spam(), "A")
 821         self.assertEqual(C().boo(), "C")
 822         class D(B, C): pass
 823         self.assertEqual(D().spam(), "B")
 824         self.assertEqual(D().boo(), "B")
 825         self.assertEqual(D.__mro__, (D, B, C, A, object))
 826         class E(C, B): pass
 827         self.assertEqual(E().spam(), "B")
 828         self.assertEqual(E().boo(), "C")
 829         self.assertEqual(E.__mro__, (E, C, B, A, object))
 830         # MRO order disagreement
 831         try:
 832             class F(D, E): pass
 833         except TypeError:
 834             pass
 835         else:
 836             self.fail("expected MRO order disagreement (F)")
 837         try:
 838             class G(E, D): pass
 839         except TypeError:
 840             pass
 841         else:
 842             self.fail("expected MRO order disagreement (G)")
 843
 844     # see thread python-dev/2002-October/029035.html
 845     def test_ex5_from_c3_switch(self):
 846         # Testing ex5 from C3 switch discussion...
 847         class A(object): pass
 848         class B(object): pass
 849         class C(object): pass
 850         class X(A): pass
 851         class Y(A): pass
 852         class Z(X,B,Y,C): pass
 853         self.assertEqual(Z.__mro__, (Z, X, B, Y, A, C, object))
 854
 855     # see "A Monotonic Superclass Linearization for Dylan",
 856     # by Kim Barrett et al. (OOPSLA 1996)
 857     def test_monotonicity(self):
 858         # Testing MRO monotonicity...
 859         class Boat(object): pass
 860         class DayBoat(Boat): pass
 861         class WheelBoat(Boat): pass
 862         class EngineLess(DayBoat): pass
 863         class SmallMultihull(DayBoat): pass
 864         class PedalWheelBoat(EngineLess,WheelBoat): pass
 865         class SmallCatamaran(SmallMultihull): pass
 866         class Pedalo(PedalWheelBoat,SmallCatamaran): pass
 867
 868         self.assertEqual(PedalWheelBoat.__mro__,
 869               (PedalWheelBoat, EngineLess, DayBoat, WheelBoat, Boat, object))
 870         self.assertEqual(SmallCatamaran.__mro__,
 871               (SmallCatamaran, SmallMultihull, DayBoat, Boat, object))
 872         self.assertEqual(Pedalo.__mro__,
 873               (Pedalo, PedalWheelBoat, EngineLess, SmallCatamaran,
 874                SmallMultihull, DayBoat, WheelBoat, Boat, object))
 875
 876     # see "A Monotonic Superclass Linearization for Dylan",
 877     # by Kim Barrett et al. (OOPSLA 1996)
 878     def test_consistency_with_epg(self):
 879         # Testing consistentcy with EPG...
 880         class Pane(object): pass
 881         class ScrollingMixin(object): pass
 882         class EditingMixin(object): pass
 883         class ScrollablePane(Pane,ScrollingMixin): pass
 884         class EditablePane(Pane,EditingMixin): pass
 885         class EditableScrollablePane(ScrollablePane,EditablePane): pass
 886
 887         self.assertEqual(EditableScrollablePane.__mro__,
 888               (EditableScrollablePane, ScrollablePane, EditablePane, Pane,
 889                 ScrollingMixin, EditingMixin, object))
 890
 891     def test_mro_disagreement(self):
 892         # Testing error messages for MRO disagreement...
 893         mro_err_msg = """Cannot create a consistent method resolution
 894 order (MRO) for bases """
 895
 896         def raises(exc, expected, callable, *args):
 897             try:
 898                 callable(*args)
 899             except exc, msg:
 900                 # the exact msg is generally considered an impl detail
 901                 if test_support.check_impl_detail():
 902                     if not str(msg).startswith(expected):
 903                         self.fail("Message %r, expected %r" %
 904                                   (str(msg), expected))
 905             else:
 906                 self.fail("Expected %s" % exc)
 907
 908         class A(object): pass
 909         class B(A): pass
 910         class C(object): pass
 911
 912         # Test some very simple errors
 913         raises(TypeError, "duplicate base class A",
 914                type, "X", (A, A), {})
 915         raises(TypeError, mro_err_msg,
 916                type, "X", (A, B), {})
 917         raises(TypeError, mro_err_msg,
 918                type, "X", (A, C, B), {})
 919         # Test a slightly more complex error
 920         class GridLayout(object): pass
 921         class HorizontalGrid(GridLayout): pass
 922         class VerticalGrid(GridLayout): pass
 923         class HVGrid(HorizontalGrid, VerticalGrid): pass
 924         class VHGrid(VerticalGrid, HorizontalGrid): pass
 925         raises(TypeError, mro_err_msg,
 926                type, "ConfusedGrid", (HVGrid, VHGrid), {})
 927
 928     def test_object_class(self):
 929         # Testing object class...
 930         a = object()
 931         self.assertEqual(a.__class__, object)
 932         self.assertEqual(type(a), object)
 933         b = object()
 934         self.assertNotEqual(a, b)
 935         self.assertFalse(hasattr(a, "foo"))
 936         try:
 937             a.foo = 12
 938         except (AttributeError, TypeError):
 939             pass
 940         else:
 941             self.fail("object() should not allow setting a foo attribute")
 942         self.assertFalse(hasattr(object(), "__dict__"))
 943
 944         class Cdict(object):
 945             pass
 946         x = Cdict()
 947         self.assertEqual(x.__dict__, {})
 948         x.foo = 1
 949         self.assertEqual(x.foo, 1)
 950         self.assertEqual(x.__dict__, {'foo': 1})
 951
 952     def test_slots(self):
 953         # Testing __slots__...
 954         class C0(object):
 955             __slots__ = []
 956         x = C0()
 957         self.assertFalse(hasattr(x, "__dict__"))
 958         self.assertFalse(hasattr(x, "foo"))
 959
 960         class C1(object):
 961             __slots__ = ['a']
 962         x = C1()
 963         self.assertFalse(hasattr(x, "__dict__"))
 964         self.assertFalse(hasattr(x, "a"))
 965         x.a = 1
 966         self.assertEqual(x.a, 1)
 967         x.a = None
 968         self.assertEqual(x.a, None)
 969         del x.a
 970         self.assertFalse(hasattr(x, "a"))
 971
 972         class C3(object):
 973             __slots__ = ['a', 'b', 'c']
 974         x = C3()
 975         self.assertFalse(hasattr(x, "__dict__"))
 976         self.assertFalse(hasattr(x, 'a'))
 977         self.assertFalse(hasattr(x, 'b'))
 978         self.assertFalse(hasattr(x, 'c'))
 979         x.a = 1
 980         x.b = 2
 981         x.c = 3
 982         self.assertEqual(x.a, 1)
 983         self.assertEqual(x.b, 2)
 984         self.assertEqual(x.c, 3)
 985
 986         class C4(object):
 987             """Validate name mangling"""
 988             __slots__ = ['__a']
 989             def __init__(self, value):
 990                 self.__a = value
 991             def get(self):
 992                 return self.__a
 993         x = C4(5)
 994         self.assertFalse(hasattr(x, '__dict__'))
 995         self.assertFalse(hasattr(x, '__a'))
 996         self.assertEqual(x.get(), 5)
 997         try:
 998             x.__a = 6
 999         except AttributeError:
1000             pass
1001         else:
1002             self.fail("Double underscored names not mangled")
1003
1004         # Make sure slot names are proper identifiers
1005         try:
1006             class C(object):
1007                 __slots__ = [None]
1008         except TypeError:
1009             pass
1010         else:
1011             self.fail("[None] slots not caught")
1012         try:
1013             class C(object):
1014                 __slots__ = ["foo bar"]
1015         except TypeError:
1016             pass
1017         else:
1018             self.fail("['foo bar'] slots not caught")
1019         try:
1020             class C(object):
1021                 __slots__ = ["foo\0bar"]
1022         except TypeError:
1023             pass
1024         else:
1025             self.fail("['foo\\0bar'] slots not caught")
1026         try:
1027             class C(object):
1028                 __slots__ = ["1"]
1029         except TypeError:
1030             pass
1031         else:
1032             self.fail("['1'] slots not caught")
1033         try:
1034             class C(object):
1035                 __slots__ = [""]
1036         except TypeError:
1037             pass
1038         else:
1039             self.fail("[''] slots not caught")
1040         class C(object):
1041             __slots__ = ["a", "a_b", "_a", "A0123456789Z"]
1042         # XXX(nnorwitz): was there supposed to be something tested
1043         # from the class above?
1044
1045         # Test a single string is not expanded as a sequence.
1046         class C(object):
1047             __slots__ = "abc"
1048         c = C()
1049         c.abc = 5
1050         self.assertEqual(c.abc, 5)
1051
1052         # Test unicode slot names
1053         try:
1054             unicode
1055         except NameError:
1056             pass
1057         else:
1058             # Test a single unicode string is not expanded as a sequence.
1059             class C(object):
1060                 __slots__ = unicode("abc")
1061             c = C()
1062             c.abc = 5
1063             self.assertEqual(c.abc, 5)
1064
1065             # _unicode_to_string used to modify slots in certain circumstances
1066             slots = (unicode("foo"), unicode("bar"))
1067             class C(object):
1068                 __slots__ = slots
1069             x = C()
1070             x.foo = 5
1071             self.assertEqual(x.foo, 5)
1072             self.assertEqual(type(slots[0]), unicode)
1073             # this used to leak references
1074             try:
1075                 class C(object):
1076                     __slots__ = [unichr(128)]
1077             except (TypeError, UnicodeEncodeError):
1078                 pass
1079             else:
1080                 self.fail("[unichr(128)] slots not caught")
1081
1082         # Test leaks
1083         class Counted(object):
1084             counter = 0    # counts the number of instances alive
1085             def __init__(self):
1086                 Counted.counter += 1
1087             def __del__(self):
1088                 Counted.counter -= 1
1089         class C(object):
1090             __slots__ = ['a', 'b', 'c']
1091         x = C()
1092         x.a = Counted()
1093         x.b = Counted()
1094         x.c = Counted()
1095         self.assertEqual(Counted.counter, 3)
1096         del x
1097         test_support.gc_collect()
1098         self.assertEqual(Counted.counter, 0)
1099         class D(C):
1100             pass
1101         x = D()
1102         x.a = Counted()
1103         x.z = Counted()
1104         self.assertEqual(Counted.counter, 2)
1105         del x
1106         test_support.gc_collect()
1107         self.assertEqual(Counted.counter, 0)
1108         class E(D):
1109             __slots__ = ['e']
1110         x = E()
1111         x.a = Counted()
1112         x.z = Counted()
1113         x.e = Counted()
1114         self.assertEqual(Counted.counter, 3)
1115         del x
1116         test_support.gc_collect()
1117         self.assertEqual(Counted.counter, 0)
1118
1119         # Test cyclical leaks [SF bug 519621]
1120         class F(object):
1121             __slots__ = ['a', 'b']
1122         s = F()
1123         s.a = [Counted(), s]
1124         self.assertEqual(Counted.counter, 1)
1125         s = None
1126         test_support.gc_collect()
1127         self.assertEqual(Counted.counter, 0)
1128
1129         # Test lookup leaks [SF bug 572567]
1130         import gc
1131         if hasattr(gc, 'get_objects'):
1132             class G(object):
1133                 def __cmp__(self, other):
1134                     return 0
1135                 __hash__ = None # Silence Py3k warning
1136             g = G()
1137             orig_objects = len(gc.get_objects())
1138             for i in xrange(10):
1139                 g==g
1140             new_objects = len(gc.get_objects())
1141             self.assertEqual(orig_objects, new_objects)
1142
1143         class H(object):
1144             __slots__ = ['a', 'b']
1145             def __init__(self):
1146                 self.a = 1
1147                 self.b = 2
1148             def __del__(self_):
1149                 self.assertEqual(self_.a, 1)
1150                 self.assertEqual(self_.b, 2)
1151         with test_support.captured_output('stderr') as s:
1152             h = H()
1153             del h
1154         self.assertEqual(s.getvalue(), '')
1155
1156         class X(object):
1157             __slots__ = "a"
1158         with self.assertRaises(AttributeError):
1159             del X().a
1160
1161     def test_slots_special(self):
1162         # Testing __dict__ and __weakref__ in __slots__...
1163         class D(object):
1164             __slots__ = ["__dict__"]
1165         a = D()
1166         self.assertTrue(hasattr(a, "__dict__"))
1167         self.assertFalse(hasattr(a, "__weakref__"))
1168         a.foo = 42
1169         self.assertEqual(a.__dict__, {"foo": 42})
1170
1171         class W(object):
1172             __slots__ = ["__weakref__"]
1173         a = W()
1174         self.assertTrue(hasattr(a, "__weakref__"))
1175         self.assertFalse(hasattr(a, "__dict__"))
1176         try:
1177             a.foo = 42
1178         except AttributeError:
1179             pass
1180         else:
1181             self.fail("shouldn't be allowed to set a.foo")
1182
1183         class C1(W, D):
1184             __slots__ = []
1185         a = C1()
1186         self.assertTrue(hasattr(a, "__dict__"))
1187         self.assertTrue(hasattr(a, "__weakref__"))
1188         a.foo = 42
1189         self.assertEqual(a.__dict__, {"foo": 42})
1190
1191         class C2(D, W):
1192             __slots__ = []
1193         a = C2()
1194         self.assertTrue(hasattr(a, "__dict__"))
1195         self.assertTrue(hasattr(a, "__weakref__"))
1196         a.foo = 42
1197         self.assertEqual(a.__dict__, {"foo": 42})
1198
1199     def test_slots_descriptor(self):
1200         # Issue2115: slot descriptors did not correctly check
1201         # the type of the given object
1202         import abc
1203         class MyABC:
1204             __metaclass__ = abc.ABCMeta
1205             __slots__ = "a"
1206
1207         class Unrelated(object):
1208             pass
1209         MyABC.register(Unrelated)
1210
1211         u = Unrelated()
1212         self.assertIsInstance(u, MyABC)
1213
1214         # This used to crash
1215         self.assertRaises(TypeError, MyABC.a.__set__, u, 3)
1216
1217     def test_metaclass_cmp(self):
1218         # See bug 7491.
1219         class M(type):
1220             def __cmp__(self, other):
1221                 return -1
1222         class X(object):
1223             __metaclass__ = M
1224         self.assertTrue(X < M)
1225
1226     def test_dynamics(self):
1227         # Testing class attribute propagation...
1228         class D(object):
1229             pass
1230         class E(D):
1231             pass
1232         class F(D):
1233             pass
1234         D.foo = 1
1235         self.assertEqual(D.foo, 1)
1236         # Test that dynamic attributes are inherited
1237         self.assertEqual(E.foo, 1)
1238         self.assertEqual(F.foo, 1)
1239         # Test dynamic instances
1240         class C(object):
1241             pass
1242         a = C()
1243         self.assertFalse(hasattr(a, "foobar"))
1244         C.foobar = 2
1245         self.assertEqual(a.foobar, 2)
1246         C.method = lambda self: 42
1247         self.assertEqual(a.method(), 42)
1248         C.__repr__ = lambda self: "C()"
1249         self.assertEqual(repr(a), "C()")
1250         C.__int__ = lambda self: 100
1251         self.assertEqual(int(a), 100)
1252         self.assertEqual(a.foobar, 2)
1253         self.assertFalse(hasattr(a, "spam"))
1254         def mygetattr(self, name):
1255             if name == "spam":
1256                 return "spam"
1257             raise AttributeError
1258         C.__getattr__ = mygetattr
1259         self.assertEqual(a.spam, "spam")
1260         a.new = 12
1261         self.assertEqual(a.new, 12)
1262         def mysetattr(self, name, value):
1263             if name == "spam":
1264                 raise AttributeError
1265             return object.__setattr__(self, name, value)
1266         C.__setattr__ = mysetattr
1267         try:
1268             a.spam = "not spam"
1269         except AttributeError:
1270             pass
1271         else:
1272             self.fail("expected AttributeError")
1273         self.assertEqual(a.spam, "spam")
1274         class D(C):
1275             pass
1276         d = D()
1277         d.foo = 1
1278         self.assertEqual(d.foo, 1)
1279
1280         # Test handling of int*seq and seq*int
1281         class I(int):
1282             pass
1283         self.assertEqual("a"*I(2), "aa")
1284         self.assertEqual(I(2)*"a", "aa")
1285         self.assertEqual(2*I(3), 6)
1286         self.assertEqual(I(3)*2, 6)
1287         self.assertEqual(I(3)*I(2), 6)
1288
1289         # Test handling of long*seq and seq*long
1290         class L(long):
1291             pass
1292         self.assertEqual("a"*L(2L), "aa")
1293         self.assertEqual(L(2L)*"a", "aa")
1294         self.assertEqual(2*L(3), 6)
1295         self.assertEqual(L(3)*2, 6)
1296         self.assertEqual(L(3)*L(2), 6)
1297
1298         # Test comparison of classes with dynamic metaclasses
1299         class dynamicmetaclass(type):
1300             pass
1301         class someclass:
1302             __metaclass__ = dynamicmetaclass
1303         self.assertNotEqual(someclass, object)
1304
1305     def test_errors(self):
1306         # Testing errors...
1307         try:
1308             class C(list, dict):
1309                 pass
1310         except TypeError:
1311             pass
1312         else:
1313             self.fail("inheritance from both list and dict should be illegal")
1314
1315         try:
1316             class C(object, None):
1317                 pass
1318         except TypeError:
1319             pass
1320         else:
1321             self.fail("inheritance from non-type should be illegal")
1322         class Classic:
1323             pass
1324
1325         try:
1326             class C(type(len)):
1327                 pass
1328         except TypeError:
1329             pass
1330         else:
1331             self.fail("inheritance from CFunction should be illegal")
1332
1333         try:
1334             class C(object):
1335                 __slots__ = 1
1336         except TypeError:
1337             pass
1338         else:
1339             self.fail("__slots__ = 1 should be illegal")
1340
1341         try:
1342             class C(object):
1343                 __slots__ = [1]
1344         except TypeError:
1345             pass
1346         else:
1347             self.fail("__slots__ = [1] should be illegal")
1348
1349         class M1(type):
1350             pass
1351         class M2(type):
1352             pass
1353         class A1(object):
1354             __metaclass__ = M1
1355         class A2(object):
1356             __metaclass__ = M2
1357         try:
1358             class B(A1, A2):
1359                 pass
1360         except TypeError:
1361             pass
1362         else:
1363             self.fail("finding the most derived metaclass should have failed")
1364
1365     def test_classmethods(self):
1366         # Testing class methods...
1367         class C(object):
1368             def foo(*a): return a
1369             goo = classmethod(foo)
1370         c = C()
1371         self.assertEqual(C.goo(1), (C, 1))
1372         self.assertEqual(c.goo(1), (C, 1))
1373         self.assertEqual(c.foo(1), (c, 1))
1374         class D(C):
1375             pass
1376         d = D()
1377         self.assertEqual(D.goo(1), (D, 1))
1378         self.assertEqual(d.goo(1), (D, 1))
1379         self.assertEqual(d.foo(1), (d, 1))
1380         self.assertEqual(D.foo(d, 1), (d, 1))
1381         # Test for a specific crash (SF bug 528132)
1382         def f(cls, arg): return (cls, arg)
1383         ff = classmethod(f)
1384         self.assertEqual(ff.__get__(0, int)(42), (int, 42))
1385         self.assertEqual(ff.__get__(0)(42), (int, 42))
1386
1387         # Test super() with classmethods (SF bug 535444)
1388         self.assertEqual(C.goo.im_self, C)
1389         self.assertEqual(D.goo.im_self, D)
1390         self.assertEqual(super(D,D).goo.im_self, D)
1391         self.assertEqual(super(D,d).goo.im_self, D)
1392         self.assertEqual(super(D,D).goo(), (D,))
1393         self.assertEqual(super(D,d).goo(), (D,))
1394
1395         # Verify that a non-callable will raise
1396         meth = classmethod(1).__get__(1)
1397         self.assertRaises(TypeError, meth)
1398
1399         # Verify that classmethod() doesn't allow keyword args
1400         try:
1401             classmethod(f, kw=1)
1402         except TypeError:
1403             pass
1404         else:
1405             self.fail("classmethod shouldn't accept keyword args")
1406
1407     @test_support.impl_detail("the module 'xxsubtype' is internal")
1408     def test_classmethods_in_c(self):
1409         # Testing C-based class methods...
1410         import xxsubtype as spam
1411         a = (1, 2, 3)
1412         d = {'abc': 123}
1413         x, a1, d1 = spam.spamlist.classmeth(*a, **d)
1414         self.assertEqual(x, spam.spamlist)
1415         self.assertEqual(a, a1)
1416         self.assertEqual(d, d1)
1417         x, a1, d1 = spam.spamlist().classmeth(*a, **d)
1418         self.assertEqual(x, spam.spamlist)
1419         self.assertEqual(a, a1)
1420         self.assertEqual(d, d1)
1421
1422     def test_staticmethods(self):
1423         # Testing static methods...
1424         class C(object):
1425             def foo(*a): return a
1426             goo = staticmethod(foo)
1427         c = C()
1428         self.assertEqual(C.goo(1), (1,))
1429         self.assertEqual(c.goo(1), (1,))
1430         self.assertEqual(c.foo(1), (c, 1,))
1431         class D(C):
1432             pass
1433         d = D()
1434         self.assertEqual(D.goo(1), (1,))
1435         self.assertEqual(d.goo(1), (1,))
1436         self.assertEqual(d.foo(1), (d, 1))
1437         self.assertEqual(D.foo(d, 1), (d, 1))
1438
1439     @test_support.impl_detail("the module 'xxsubtype' is internal")
1440     def test_staticmethods_in_c(self):
1441         # Testing C-based static methods...
1442         import xxsubtype as spam
1443         a = (1, 2, 3)
1444         d = {"abc": 123}
1445         x, a1, d1 = spam.spamlist.staticmeth(*a, **d)
1446         self.assertEqual(x, None)
1447         self.assertEqual(a, a1)
1448         self.assertEqual(d, d1)
1449         x, a1, d2 = spam.spamlist().staticmeth(*a, **d)
1450         self.assertEqual(x, None)
1451         self.assertEqual(a, a1)
1452         self.assertEqual(d, d1)
1453
1454     def test_classic(self):
1455         # Testing classic classes...
1456         class C:
1457             def foo(*a): return a
1458             goo = classmethod(foo)
1459         c = C()
1460         self.assertEqual(C.goo(1), (C, 1))
1461         self.assertEqual(c.goo(1), (C, 1))
1462         self.assertEqual(c.foo(1), (c, 1))
1463         class D(C):
1464             pass
1465         d = D()
1466         self.assertEqual(D.goo(1), (D, 1))
1467         self.assertEqual(d.goo(1), (D, 1))
1468         self.assertEqual(d.foo(1), (d, 1))
1469         self.assertEqual(D.foo(d, 1), (d, 1))
1470         class E: # *not* subclassing from C
1471             foo = C.foo
1472         self.assertEqual(E().foo, C.foo) # i.e., unbound
1473         self.assertTrue(repr(C.foo.__get__(C())).startswith("<bound method "))
1474
1475     def test_compattr(self):
1476         # Testing computed attributes...
1477         class C(object):
1478             class computed_attribute(object):
1479                 def __init__(self, get, set=None, delete=None):
1480                     self.__get = get
1481                     self.__set = set
1482                     self.__delete = delete
1483                 def __get__(self, obj, type=None):
1484                     return self.__get(obj)
1485                 def __set__(self, obj, value):
1486                     return self.__set(obj, value)
1487                 def __delete__(self, obj):
1488                     return self.__delete(obj)
1489             def __init__(self):
1490                 self.__x = 0
1491             def __get_x(self):
1492                 x = self.__x
1493                 self.__x = x+1
1494                 return x
1495             def __set_x(self, x):
1496                 self.__x = x
1497             def __delete_x(self):
1498                 del self.__x
1499             x = computed_attribute(__get_x, __set_x, __delete_x)
1500         a = C()
1501         self.assertEqual(a.x, 0)
1502         self.assertEqual(a.x, 1)
1503         a.x = 10
1504         self.assertEqual(a.x, 10)
1505         self.assertEqual(a.x, 11)
1506         del a.x
1507         self.assertEqual(hasattr(a, 'x'), 0)
1508
1509     def test_newslots(self):
1510         # Testing __new__ slot override...
1511         class C(list):
1512             def __new__(cls):
1513                 self = list.__new__(cls)
1514                 self.foo = 1
1515                 return self
1516             def __init__(self):
1517                 self.foo = self.foo + 2
1518         a = C()
1519         self.assertEqual(a.foo, 3)
1520         self.assertEqual(a.__class__, C)
1521         class D(C):
1522             pass
1523         b = D()
1524         self.assertEqual(b.foo, 3)
1525         self.assertEqual(b.__class__, D)
1526
1527     def test_altmro(self):
1528         # Testing mro() and overriding it...
1529         class A(object):
1530             def f(self): return "A"
1531         class B(A):
1532             pass
1533         class C(A):
1534             def f(self): return "C"
1535         class D(B, C):
1536             pass
1537         self.assertEqual(D.mro(), [D, B, C, A, object])
1538         self.assertEqual(D.__mro__, (D, B, C, A, object))
1539         self.assertEqual(D().f(), "C")
1540
1541         class PerverseMetaType(type):
1542             def mro(cls):
1543                 L = type.mro(cls)
1544                 L.reverse()
1545                 return L
1546         class X(D,B,C,A):
1547             __metaclass__ = PerverseMetaType
1548         self.assertEqual(X.__mro__, (object, A, C, B, D, X))
1549         self.assertEqual(X().f(), "A")
1550
1551         try:
1552             class X(object):
1553                 class __metaclass__(type):
1554                     def mro(self):
1555                         return [self, dict, object]
1556             # In CPython, the class creation above already raises
1557             # TypeError, as a protection against the fact that
1558             # instances of X would segfault it.  In other Python
1559             # implementations it would be ok to let the class X
1560             # be created, but instead get a clean TypeError on the
1561             # __setitem__ below.
1562             x = object.__new__(X)
1563             x[5] = 6
1564         except TypeError:
1565             pass
1566         else:
1567             self.fail("devious mro() return not caught")
1568
1569         try:
1570             class X(object):
1571                 class __metaclass__(type):
1572                     def mro(self):
1573                         return [1]
1574         except TypeError:
1575             pass
1576         else:
1577             self.fail("non-class mro() return not caught")
1578
1579         try:
1580             class X(object):
1581                 class __metaclass__(type):
1582                     def mro(self):
1583                         return 1
1584         except TypeError:
1585             pass
1586         else:
1587             self.fail("non-sequence mro() return not caught")
1588
1589     def test_overloading(self):
1590         # Testing operator overloading...
1591
1592         class B(object):
1593             "Intermediate class because object doesn't have a __setattr__"
1594
1595         class C(B):
1596             def __getattr__(self, name):
1597                 if name == "foo":
1598                     return ("getattr", name)
1599                 else:
1600                     raise AttributeError
1601             def __setattr__(self, name, value):
1602                 if name == "foo":
1603                     self.setattr = (name, value)
1604                 else:
1605                     return B.__setattr__(self, name, value)
1606             def __delattr__(self, name):
1607                 if name == "foo":
1608                     self.delattr = name
1609                 else:
1610                     return B.__delattr__(self, name)
1611
1612             def __getitem__(self, key):
1613                 return ("getitem", key)
1614             def __setitem__(self, key, value):
1615                 self.setitem = (key, value)
1616             def __delitem__(self, key):
1617                 self.delitem = key
1618
1619             def __getslice__(self, i, j):
1620                 return ("getslice", i, j)
1621             def __setslice__(self, i, j, value):
1622                 self.setslice = (i, j, value)
1623             def __delslice__(self, i, j):
1624                 self.delslice = (i, j)
1625
1626         a = C()
1627         self.assertEqual(a.foo, ("getattr", "foo"))
1628         a.foo = 12
1629         self.assertEqual(a.setattr, ("foo", 12))
1630         del a.foo
1631         self.assertEqual(a.delattr, "foo")
1632
1633         self.assertEqual(a[12], ("getitem", 12))
1634         a[12] = 21
1635         self.assertEqual(a.setitem, (12, 21))
1636         del a[12]
1637         self.assertEqual(a.delitem, 12)
1638
1639         self.assertEqual(a[0:10], ("getslice", 0, 10))
1640         a[0:10] = "foo"
1641         self.assertEqual(a.setslice, (0, 10, "foo"))
1642         del a[0:10]
1643         self.assertEqual(a.delslice, (0, 10))
1644
1645     def test_methods(self):
1646         # Testing methods...
1647         class C(object):
1648             def __init__(self, x):
1649                 self.x = x
1650             def foo(self):
1651                 return self.x
1652         c1 = C(1)
1653         self.assertEqual(c1.foo(), 1)
1654         class D(C):
1655             boo = C.foo
1656             goo = c1.foo
1657         d2 = D(2)
1658         self.assertEqual(d2.foo(), 2)
1659         self.assertEqual(d2.boo(), 2)
1660         self.assertEqual(d2.goo(), 1)
1661         class E(object):
1662             foo = C.foo
1663         self.assertEqual(E().foo, C.foo) # i.e., unbound
1664         self.assertTrue(repr(C.foo.__get__(C(1))).startswith("<bound method "))
1665
1666     def test_special_method_lookup(self):
1667         # The lookup of special methods bypasses __getattr__ and
1668         # __getattribute__, but they still can be descriptors.
1669
1670         def run_context(manager):
1671             with manager:
1672                 pass
1673         def iden(self):
1674             return self
1675         def hello(self):
1676             return "hello"
1677         def empty_seq(self):
1678             return []
1679         def zero(self):
1680             return 0
1681         def complex_num(self):
1682             return 1j
1683         def stop(self):
1684             raise StopIteration
1685         def return_true(self, thing=None):
1686             return True
1687         def do_isinstance(obj):
1688             return isinstance(int, obj)
1689         def do_issubclass(obj):
1690             return issubclass(int, obj)
1691         def swallow(*args):
1692             pass
1693         def do_dict_missing(checker):
1694             class DictSub(checker.__class__, dict):
1695                 pass
1696             self.assertEqual(DictSub()["hi"], 4)
1697         def some_number(self_, key):
1698             self.assertEqual(key, "hi")
1699             return 4
1700         def format_impl(self, spec):
1701             return "hello"
1702
1703         # It would be nice to have every special method tested here, but I'm
1704         # only listing the ones I can remember outside of typeobject.c, since it
1705         # does it right.
1706         specials = [
1707             ("__unicode__", unicode, hello, set(), {}),
1708             ("__reversed__", reversed, empty_seq, set(), {}),
1709             ("__length_hint__", list, zero, set(),
1710              {"__iter__" : iden, "next" : stop}),
1711             ("__sizeof__", sys.getsizeof, zero, set(), {}),
1712             ("__instancecheck__", do_isinstance, return_true, set(), {}),
1713             ("__missing__", do_dict_missing, some_number,
1714              set(("__class__",)), {}),
1715             ("__subclasscheck__", do_issubclass, return_true,
1716              set(("__bases__",)), {}),
1717             ("__enter__", run_context, iden, set(), {"__exit__" : swallow}),
1718             ("__exit__", run_context, swallow, set(), {"__enter__" : iden}),
1719             ("__complex__", complex, complex_num, set(), {}),
1720             ("__format__", format, format_impl, set(), {}),
1721             ]
1722
1723         class Checker(object):
1724             def __getattr__(self, attr, test=self):
1725                 test.fail("__getattr__ called with {0}".format(attr))
1726             def __getattribute__(self, attr, test=self):
1727                 if attr not in ok:
1728                     test.fail("__getattribute__ called with {0}".format(attr))
1729                 return object.__getattribute__(self, attr)
1730         class SpecialDescr(object):
1731             def __init__(self, impl):
1732                 self.impl = impl
1733             def __get__(self, obj, owner):
1734                 record.append(1)
1735                 return self.impl.__get__(obj, owner)
1736         class MyException(Exception):
1737             pass
1738         class ErrDescr(object):
1739             def __get__(self, obj, owner):
1740                 raise MyException
1741
1742         for name, runner, meth_impl, ok, env in specials:
1743             class X(Checker):
1744                 pass
1745             for attr, obj in env.iteritems():
1746                 setattr(X, attr, obj)
1747             setattr(X, name, meth_impl)
1748             runner(X())
1749
1750             record = []
1751             class X(Checker):
1752                 pass
1753             for attr, obj in env.iteritems():
1754                 setattr(X, attr, obj)
1755             setattr(X, name, SpecialDescr(meth_impl))
1756             runner(X())
1757             self.assertEqual(record, [1], name)
1758
1759             class X(Checker):
1760                 pass
1761             for attr, obj in env.iteritems():
1762                 setattr(X, attr, obj)
1763             setattr(X, name, ErrDescr())
1764             try:
1765                 runner(X())
1766             except MyException:
1767                 pass
1768             else:
1769                 self.fail("{0!r} didn't raise".format(name))
1770
1771     def test_specials(self):
1772         # Testing special operators...
1773         # Test operators like __hash__ for which a built-in default exists
1774
1775         # Test the default behavior for static classes
1776         class C(object):
1777             def __getitem__(self, i):
1778                 if 0 <= i < 10: return i
1779                 raise IndexError
1780         c1 = C()
1781         c2 = C()
1782         self.assertTrue(not not c1) # What?
1783         self.assertNotEqual(id(c1), id(c2))
1784         hash(c1)
1785         hash(c2)
1786         self.assertEqual(cmp(c1, c2), cmp(id(c1), id(c2)))
1787         self.assertEqual(c1, c1)
1788         self.assertTrue(c1 != c2)
1789         self.assertTrue(not c1 != c1)
1790         self.assertTrue(not c1 == c2)
1791         # Note that the module name appears in str/repr, and that varies
1792         # depending on whether this test is run standalone or from a framework.
1793         self.assertTrue(str(c1).find('C object at ') >= 0)
1794         self.assertEqual(str(c1), repr(c1))
1795         self.assertNotIn(-1, c1)
1796         for i in range(10):
1797             self.assertIn(i, c1)
1798         self.assertNotIn(10, c1)
1799         # Test the default behavior for dynamic classes
1800         class D(object):
1801             def __getitem__(self, i):
1802                 if 0 <= i < 10: return i
1803                 raise IndexError
1804         d1 = D()
1805         d2 = D()
1806         self.assertTrue(not not d1)
1807         self.assertNotEqual(id(d1), id(d2))
1808         hash(d1)
1809         hash(d2)
1810         self.assertEqual(cmp(d1, d2), cmp(id(d1), id(d2)))
1811         self.assertEqual(d1, d1)
1812         self.assertNotEqual(d1, d2)
1813         self.assertTrue(not d1 != d1)
1814         self.assertTrue(not d1 == d2)
1815         # Note that the module name appears in str/repr, and that varies
1816         # depending on whether this test is run standalone or from a framework.
1817         self.assertTrue(str(d1).find('D object at ') >= 0)
1818         self.assertEqual(str(d1), repr(d1))
1819         self.assertNotIn(-1, d1)
1820         for i in range(10):
1821             self.assertIn(i, d1)
1822         self.assertNotIn(10, d1)
1823         # Test overridden behavior for static classes
1824         class Proxy(object):
1825             def __init__(self, x):
1826                 self.x = x
1827             def __nonzero__(self):
1828                 return not not self.x
1829             def __hash__(self):
1830                 return hash(self.x)
1831             def __eq__(self, other):
1832                 return self.x == other
1833             def __ne__(self, other):
1834                 return self.x != other
1835             def __cmp__(self, other):
1836                 return cmp(self.x, other.x)
1837             def __str__(self):
1838                 return "Proxy:%s" % self.x
1839             def __repr__(self):
1840                 return "Proxy(%r)" % self.x
1841             def __contains__(self, value):
1842                 return value in self.x
1843         p0 = Proxy(0)
1844         p1 = Proxy(1)
1845         p_1 = Proxy(-1)
1846         self.assertFalse(p0)
1847         self.assertTrue(not not p1)
1848         self.assertEqual(hash(p0), hash(0))
1849         self.assertEqual(p0, p0)
1850         self.assertNotEqual(p0, p1)
1851         self.assertTrue(not p0 != p0)
1852         self.assertEqual(not p0, p1)
1853         self.assertEqual(cmp(p0, p1), -1)
1854         self.assertEqual(cmp(p0, p0), 0)
1855         self.assertEqual(cmp(p0, p_1), 1)
1856         self.assertEqual(str(p0), "Proxy:0")
1857         self.assertEqual(repr(p0), "Proxy(0)")
1858         p10 = Proxy(range(10))
1859         self.assertNotIn(-1, p10)
1860         for i in range(10):
1861             self.assertIn(i, p10)
1862         self.assertNotIn(10, p10)
1863         # Test overridden behavior for dynamic classes
1864         class DProxy(object):
1865             def __init__(self, x):
1866                 self.x = x
1867             def __nonzero__(self):
1868                 return not not self.x
1869             def __hash__(self):
1870                 return hash(self.x)
1871             def __eq__(self, other):
1872                 return self.x == other
1873             def __ne__(self, other):
1874                 return self.x != other
1875             def __cmp__(self, other):
1876                 return cmp(self.x, other.x)
1877             def __str__(self):
1878                 return "DProxy:%s" % self.x
1879             def __repr__(self):
1880                 return "DProxy(%r)" % self.x
1881             def __contains__(self, value):
1882                 return value in self.x
1883         p0 = DProxy(0)
1884         p1 = DProxy(1)
1885         p_1 = DProxy(-1)
1886         self.assertFalse(p0)
1887         self.assertTrue(not not p1)
1888         self.assertEqual(hash(p0), hash(0))
1889         self.assertEqual(p0, p0)
1890         self.assertNotEqual(p0, p1)
1891         self.assertNotEqual(not p0, p0)
1892         self.assertEqual(not p0, p1)
1893         self.assertEqual(cmp(p0, p1), -1)
1894         self.assertEqual(cmp(p0, p0), 0)
1895         self.assertEqual(cmp(p0, p_1), 1)
1896         self.assertEqual(str(p0), "DProxy:0")
1897         self.assertEqual(repr(p0), "DProxy(0)")
1898         p10 = DProxy(range(10))
1899         self.assertNotIn(-1, p10)
1900         for i in range(10):
1901             self.assertIn(i, p10)
1902         self.assertNotIn(10, p10)
1903
1904         # Safety test for __cmp__
1905         def unsafecmp(a, b):
1906             if not hasattr(a, '__cmp__'):
1907                 return   # some types don't have a __cmp__ any more (so the
1908                          # test doesn't make sense any more), or maybe they
1909                          # never had a __cmp__ at all, e.g. in PyPy
1910             try:
1911                 a.__class__.__cmp__(a, b)
1912             except TypeError:
1913                 pass
1914             else:
1915                 self.fail("shouldn't allow %s.__cmp__(%r, %r)" % (
1916                     a.__class__, a, b))
1917
1918         unsafecmp(u"123", "123")
1919         unsafecmp("123", u"123")
1920         unsafecmp(1, 1.0)
1921         unsafecmp(1.0, 1)
1922         unsafecmp(1, 1L)
1923         unsafecmp(1L, 1)
1924
1925     @test_support.impl_detail("custom logic for printing to real file objects")
1926     def test_recursions_1(self):
1927         # Testing recursion checks ...
1928         class Letter(str):
1929             def __new__(cls, letter):
1930                 if letter == 'EPS':
1931                     return str.__new__(cls)
1932                 return str.__new__(cls, letter)
1933             def __str__(self):
1934                 if not self:
1935                     return 'EPS'
1936                 return self
1937         # sys.stdout needs to be the original to trigger the recursion bug
1938         test_stdout = sys.stdout
1939         sys.stdout = test_support.get_original_stdout()
1940         try:
1941             # nothing should actually be printed, this should raise an exception
1942             print Letter('w')
1943         except RuntimeError:
1944             pass
1945         else:
1946             self.fail("expected a RuntimeError for print recursion")
1947         finally:
1948             sys.stdout = test_stdout
1949
1950     def test_recursions_2(self):
1951         # Bug #1202533.
1952         class A(object):
1953             pass
1954         A.__mul__ = types.MethodType(lambda self, x: self * x, None, A)
1955         try:
1956             A()*2
1957         except RuntimeError:
1958             pass
1959         else:
1960             self.fail("expected a RuntimeError")
1961
1962     def test_weakrefs(self):
1963         # Testing weak references...
1964         import weakref
1965         class C(object):
1966             pass
1967         c = C()
1968         r = weakref.ref(c)
1969         self.assertEqual(r(), c)
1970         del c
1971         test_support.gc_collect()
1972         self.assertEqual(r(), None)
1973         del r
1974         class NoWeak(object):
1975             __slots__ = ['foo']
1976         no = NoWeak()
1977         try:
1978             weakref.ref(no)
1979         except TypeError, msg:
1980             self.assertTrue(str(msg).find("weak reference") >= 0)
1981         else:
1982             self.fail("weakref.ref(no) should be illegal")
1983         class Weak(object):
1984             __slots__ = ['foo', '__weakref__']
1985         yes = Weak()
1986         r = weakref.ref(yes)
1987         self.assertEqual(r(), yes)
1988         del yes
1989         test_support.gc_collect()
1990         self.assertEqual(r(), None)
1991         del r
1992
1993     def test_properties(self):
1994         # Testing property...
1995         class C(object):
1996             def getx(self):
1997                 return self.__x
1998             def setx(self, value):
1999                 self.__x = value
2000             def delx(self):
2001                 del self.__x
2002             x = property(getx, setx, delx, doc="I'm the x property.")
2003         a = C()
2004         self.assertFalse(hasattr(a, "x"))
2005         a.x = 42
2006         self.assertEqual(a._C__x, 42)
2007         self.assertEqual(a.x, 42)
2008         del a.x
2009         self.assertFalse(hasattr(a, "x"))
2010         self.assertFalse(hasattr(a, "_C__x"))
2011         C.x.__set__(a, 100)
2012         self.assertEqual(C.x.__get__(a), 100)
2013         C.x.__delete__(a)
2014         self.assertFalse(hasattr(a, "x"))
2015
2016         raw = C.__dict__['x']
2017         self.assertIsInstance(raw, property)
2018
2019         attrs = dir(raw)
2020         self.assertIn("__doc__", attrs)
2021         self.assertIn("fget", attrs)
2022         self.assertIn("fset", attrs)
2023         self.assertIn("fdel", attrs)
2024
2025         self.assertEqual(raw.__doc__, "I'm the x property.")
2026         self.assertTrue(raw.fget is C.__dict__['getx'])
2027         self.assertTrue(raw.fset is C.__dict__['setx'])
2028         self.assertTrue(raw.fdel is C.__dict__['delx'])
2029
2030         for attr in "__doc__", "fget", "fset", "fdel":
2031             try:
2032                 setattr(raw, attr, 42)
2033             except TypeError, msg:
2034                 if str(msg).find('readonly') < 0:
2035                     self.fail("when setting readonly attr %r on a property, "
2036                                      "got unexpected TypeError msg %r" % (attr, str(msg)))
2037             else:
2038                 self.fail("expected TypeError from trying to set readonly %r "
2039                                  "attr on a property" % attr)
2040
2041         class D(object):
2042             __getitem__ = property(lambda s: 1/0)
2043
2044         d = D()
2045         try:
2046             for i in d:
2047                 str(i)
2048         except ZeroDivisionError:
2049             pass
2050         else:
2051             self.fail("expected ZeroDivisionError from bad property")
2052
2053     @unittest.skipIf(sys.flags.optimize >= 2,
2054                      "Docstrings are omitted with -O2 and above")
2055     def test_properties_doc_attrib(self):
2056         class E(object):
2057             def getter(self):
2058                 "getter method"
2059                 return 0
2060             def setter(self_, value):
2061                 "setter method"
2062                 pass
2063             prop = property(getter)
2064             self.assertEqual(prop.__doc__, "getter method")
2065             prop2 = property(fset=setter)
2066             self.assertEqual(prop2.__doc__, None)
2067
2068     def test_testcapi_no_segfault(self):
2069         # this segfaulted in 2.5b2
2070         try:
2071             import _testcapi
2072         except ImportError:
2073             pass
2074         else:
2075             class X(object):
2076                 p = property(_testcapi.test_with_docstring)
2077
2078     def test_properties_plus(self):
2079         class C(object):
2080             foo = property(doc="hello")
2081             @foo.getter
2082             def foo(self):
2083                 return self._foo
2084             @foo.setter
2085             def foo(self, value):
2086                 self._foo = abs(value)
2087             @foo.deleter
2088             def foo(self):
2089                 del self._foo
2090         c = C()
2091         self.assertEqual(C.foo.__doc__, "hello")
2092         self.assertFalse(hasattr(c, "foo"))
2093         c.foo = -42
2094         self.assertTrue(hasattr(c, '_foo'))
2095         self.assertEqual(c._foo, 42)
2096         self.assertEqual(c.foo, 42)
2097         del c.foo
2098         self.assertFalse(hasattr(c, '_foo'))
2099         self.assertFalse(hasattr(c, "foo"))
2100
2101         class D(C):
2102             @C.foo.deleter
2103             def foo(self):
2104                 try:
2105                     del self._foo
2106                 except AttributeError:
2107                     pass
2108         d = D()
2109         d.foo = 24
2110         self.assertEqual(d.foo, 24)
2111         del d.foo
2112         del d.foo
2113
2114         class E(object):
2115             @property
2116             def foo(self):
2117                 return self._foo
2118             @foo.setter
2119             def foo(self, value):
2120                 raise RuntimeError
2121             @foo.setter
2122             def foo(self, value):
2123                 self._foo = abs(value)
2124             @foo.deleter
2125             def foo(self, value=None):
2126                 del self._foo
2127
2128         e = E()
2129         e.foo = -42
2130         self.assertEqual(e.foo, 42)
2131         del e.foo
2132
2133         class F(E):
2134             @E.foo.deleter
2135             def foo(self):
2136                 del self._foo
2137             @foo.setter
2138             def foo(self, value):
2139                 self._foo = max(0, value)
2140         f = F()
2141         f.foo = -10
2142         self.assertEqual(f.foo, 0)
2143         del f.foo
2144
2145     def test_dict_constructors(self):
2146         # Testing dict constructor ...
2147         d = dict()
2148         self.assertEqual(d, {})
2149         d = dict({})
2150         self.assertEqual(d, {})
2151         d = dict({1: 2, 'a': 'b'})
2152         self.assertEqual(d, {1: 2, 'a': 'b'})
2153         self.assertEqual(d, dict(d.items()))
2154         self.assertEqual(d, dict(d.iteritems()))
2155         d = dict({'one':1, 'two':2})
2156         self.assertEqual(d, dict(one=1, two=2))
2157         self.assertEqual(d, dict(**d))
2158         self.assertEqual(d, dict({"one": 1}, two=2))
2159         self.assertEqual(d, dict([("two", 2)], one=1))
2160         self.assertEqual(d, dict([("one", 100), ("two", 200)], **d))
2161         self.assertEqual(d, dict(**d))
2162
2163         for badarg in 0, 0L, 0j, "0", [0], (0,):
2164             try:
2165                 dict(badarg)
2166             except TypeError:
2167                 pass
2168             except ValueError:
2169                 if badarg == "0":
2170                     # It's a sequence, and its elements are also sequences (gotta
2171                     # love strings <wink>), but they aren't of length 2, so this
2172                     # one seemed better as a ValueError than a TypeError.
2173                     pass
2174                 else:
2175                     self.fail("no TypeError from dict(%r)" % badarg)
2176             else:
2177                 self.fail("no TypeError from dict(%r)" % badarg)
2178
2179         try:
2180             dict({}, {})
2181         except TypeError:
2182             pass
2183         else:
2184             self.fail("no TypeError from dict({}, {})")
2185
2186         class Mapping:
2187             # Lacks a .keys() method; will be added later.
2188             dict = {1:2, 3:4, 'a':1j}
2189
2190         try:
2191             dict(Mapping())
2192         except TypeError:
2193             pass
2194         else:
2195             self.fail("no TypeError from dict(incomplete mapping)")
2196
2197         Mapping.keys = lambda self: self.dict.keys()
2198         Mapping.__getitem__ = lambda self, i: self.dict[i]
2199         d = dict(Mapping())
2200         self.assertEqual(d, Mapping.dict)
2201
2202         # Init from sequence of iterable objects, each producing a 2-sequence.
2203         class AddressBookEntry:
2204             def __init__(self, first, last):
2205                 self.first = first
2206                 self.last = last
2207             def __iter__(self):
2208                 return iter([self.first, self.last])
2209
2210         d = dict([AddressBookEntry('Tim', 'Warsaw'),
2211                   AddressBookEntry('Barry', 'Peters'),
2212                   AddressBookEntry('Tim', 'Peters'),
2213                   AddressBookEntry('Barry', 'Warsaw')])
2214         self.assertEqual(d, {'Barry': 'Warsaw', 'Tim': 'Peters'})
2215
2216         d = dict(zip(range(4), range(1, 5)))
2217         self.assertEqual(d, dict([(i, i+1) for i in range(4)]))
2218
2219         # Bad sequence lengths.
2220         for bad in [('tooshort',)], [('too', 'long', 'by 1')]:
2221             try:
2222                 dict(bad)
2223             except ValueError:
2224                 pass
2225             else:
2226                 self.fail("no ValueError from dict(%r)" % bad)
2227
2228     def test_dir(self):
2229         # Testing dir() ...
2230         junk = 12
2231         self.assertEqual(dir(), ['junk', 'self'])
2232         del junk
2233
2234         # Just make sure these don't blow up!
2235         for arg in 2, 2L, 2j, 2e0, [2], "2", u"2", (2,), {2:2}, type, self.test_dir:
2236             dir(arg)
2237
2238         # Try classic classes.
2239         class C:
2240             Cdata = 1
2241             def Cmethod(self): pass
2242
2243         cstuff = ['Cdata', 'Cmethod', '__doc__', '__module__']
2244         self.assertEqual(dir(C), cstuff)
2245         self.assertIn('im_self', dir(C.Cmethod))
2246
2247         c = C()  # c.__doc__ is an odd thing to see here; ditto c.__module__.
2248         self.assertEqual(dir(c), cstuff)
2249
2250         c.cdata = 2
2251         c.cmethod = lambda self: 0
2252         self.assertEqual(dir(c), cstuff + ['cdata', 'cmethod'])
2253         self.assertIn('im_self', dir(c.Cmethod))
2254
2255         class A(C):
2256             Adata = 1
2257             def Amethod(self): pass
2258
2259         astuff = ['Adata', 'Amethod'] + cstuff
2260         self.assertEqual(dir(A), astuff)
2261         self.assertIn('im_self', dir(A.Amethod))
2262         a = A()
2263         self.assertEqual(dir(a), astuff)
2264         self.assertIn('im_self', dir(a.Amethod))
2265         a.adata = 42
2266         a.amethod = lambda self: 3
2267         self.assertEqual(dir(a), astuff + ['adata', 'amethod'])
2268
2269         # The same, but with new-style classes.  Since these have object as a
2270         # base class, a lot more gets sucked in.
2271         def interesting(strings):
2272             return [s for s in strings if not s.startswith('_')]
2273
2274         class C(object):
2275             Cdata = 1
2276             def Cmethod(self): pass
2277
2278         cstuff = ['Cdata', 'Cmethod']
2279         self.assertEqual(interesting(dir(C)), cstuff)
2280
2281         c = C()
2282         self.assertEqual(interesting(dir(c)), cstuff)
2283         self.assertIn('im_self', dir(C.Cmethod))
2284
2285         c.cdata = 2
2286         c.cmethod = lambda self: 0
2287         self.assertEqual(interesting(dir(c)), cstuff + ['cdata', 'cmethod'])
2288         self.assertIn('im_self', dir(c.Cmethod))
2289
2290         class A(C):
2291             Adata = 1
2292             def Amethod(self): pass
2293
2294         astuff = ['Adata', 'Amethod'] + cstuff
2295         self.assertEqual(interesting(dir(A)), astuff)
2296         self.assertIn('im_self', dir(A.Amethod))
2297         a = A()
2298         self.assertEqual(interesting(dir(a)), astuff)
2299         a.adata = 42
2300         a.amethod = lambda self: 3
2301         self.assertEqual(interesting(dir(a)), astuff + ['adata', 'amethod'])
2302         self.assertIn('im_self', dir(a.Amethod))
2303
2304         # Try a module subclass.
2305         class M(type(sys)):
2306             pass
2307         minstance = M("m")
2308         minstance.b = 2
2309         minstance.a = 1
2310         names = [x for x in dir(minstance) if x not in ["__name__", "__doc__"]]
2311         self.assertEqual(names, ['a', 'b'])
2312
2313         class M2(M):
2314             def getdict(self):
2315                 return "Not a dict!"
2316             __dict__ = property(getdict)
2317
2318         m2instance = M2("m2")
2319         m2instance.b = 2
2320         m2instance.a = 1
2321         self.assertEqual(m2instance.__dict__, "Not a dict!")
2322         try:
2323             dir(m2instance)
2324         except TypeError:
2325             pass
2326
2327         # Two essentially featureless objects, just inheriting stuff from
2328         # object.
2329         self.assertEqual(dir(NotImplemented), dir(Ellipsis))
2330         if test_support.check_impl_detail():
2331             # None differs in PyPy: it has a __nonzero__
2332             self.assertEqual(dir(None), dir(Ellipsis))
2333
2334         # Nasty test case for proxied objects
2335         class Wrapper(object):
2336             def __init__(self, obj):
2337                 self.__obj = obj
2338             def __repr__(self):
2339                 return "Wrapper(%s)" % repr(self.__obj)
2340             def __getitem__(self, key):
2341                 return Wrapper(self.__obj[key])
2342             def __len__(self):
2343                 return len(self.__obj)
2344             def __getattr__(self, name):
2345                 return Wrapper(getattr(self.__obj, name))
2346
2347         class C(object):
2348             def __getclass(self):
2349                 return Wrapper(type(self))
2350             __class__ = property(__getclass)
2351
2352         dir(C()) # This used to segfault
2353
2354     def test_supers(self):
2355         # Testing super...
2356
2357         class A(object):
2358             def meth(self, a):
2359                 return "A(%r)" % a
2360
2361         self.assertEqual(A().meth(1), "A(1)")
2362
2363         class B(A):
2364             def __init__(self):
2365                 self.__super = super(B, self)
2366             def meth(self, a):
2367                 return "B(%r)" % a + self.__super.meth(a)
2368
2369         self.assertEqual(B().meth(2), "B(2)A(2)")
2370
2371         class C(A):
2372             def meth(self, a):
2373                 return "C(%r)" % a + self.__super.meth(a)
2374         C._C__super = super(C)
2375
2376         self.assertEqual(C().meth(3), "C(3)A(3)")
2377
2378         class D(C, B):
2379             def meth(self, a):
2380                 return "D(%r)" % a + super(D, self).meth(a)
2381
2382         self.assertEqual(D().meth(4), "D(4)C(4)B(4)A(4)")
2383
2384         # Test for subclassing super
2385
2386         class mysuper(super):
2387             def __init__(self, *args):
2388                 return super(mysuper, self).__init__(*args)
2389
2390         class E(D):
2391             def meth(self, a):
2392                 return "E(%r)" % a + mysuper(E, self).meth(a)
2393
2394         self.assertEqual(E().meth(5), "E(5)D(5)C(5)B(5)A(5)")
2395
2396         class F(E):
2397             def meth(self, a):
2398                 s = self.__super # == mysuper(F, self)
2399                 return "F(%r)[%s]" % (a, s.__class__.__name__) + s.meth(a)
2400         F._F__super = mysuper(F)
2401
2402         self.assertEqual(F().meth(6), "F(6)[mysuper]E(6)D(6)C(6)B(6)A(6)")
2403
2404         # Make sure certain errors are raised
2405
2406         try:
2407             super(D, 42)
2408         except TypeError:
2409             pass
2410         else:
2411             self.fail("shouldn't allow super(D, 42)")
2412
2413         try:
2414             super(D, C())
2415         except TypeError:
2416             pass
2417         else:
2418             self.fail("shouldn't allow super(D, C())")
2419
2420         try:
2421             super(D).__get__(12)
2422         except TypeError:
2423             pass
2424         else:
2425             self.fail("shouldn't allow super(D).__get__(12)")
2426
2427         try:
2428             super(D).__get__(C())
2429         except TypeError:
2430             pass
2431         else:
2432             self.fail("shouldn't allow super(D).__get__(C())")
2433
2434         # Make sure data descriptors can be overridden and accessed via super
2435         # (new feature in Python 2.3)
2436
2437         class DDbase(object):
2438             def getx(self): return 42
2439             x = property(getx)
2440
2441         class DDsub(DDbase):
2442             def getx(self): return "hello"
2443             x = property(getx)
2444
2445         dd = DDsub()
2446         self.assertEqual(dd.x, "hello")
2447         self.assertEqual(super(DDsub, dd).x, 42)
2448
2449         # Ensure that super() lookup of descriptor from classmethod
2450         # works (SF ID# 743627)
2451
2452         class Base(object):
2453             aProp = property(lambda self: "foo")
2454
2455         class Sub(Base):
2456             @classmethod
2457             def test(klass):
2458                 return super(Sub,klass).aProp
2459
2460         self.assertEqual(Sub.test(), Base.aProp)
2461
2462         # Verify that super() doesn't allow keyword args
2463         try:
2464             super(Base, kw=1)
2465         except TypeError:
2466             pass
2467         else:
2468             self.assertEqual("super shouldn't accept keyword args")
2469
2470     def test_basic_inheritance(self):
2471         # Testing inheritance from basic types...
2472
2473         class hexint(int):
2474             def __repr__(self):
2475                 return hex(self)
2476             def __add__(self, other):
2477                 return hexint(int.__add__(self, other))
2478             # (Note that overriding __radd__ doesn't work,
2479             # because the int type gets first dibs.)
2480         self.assertEqual(repr(hexint(7) + 9), "0x10")
2481         self.assertEqual(repr(hexint(1000) + 7), "0x3ef")
2482         a = hexint(12345)
2483         self.assertEqual(a, 12345)
2484         self.assertEqual(int(a), 12345)
2485         self.assertTrue(int(a).__class__ is int)
2486         self.assertEqual(hash(a), hash(12345))
2487         self.assertTrue((+a).__class__ is int)
2488         self.assertTrue((a >> 0).__class__ is int)
2489         self.assertTrue((a << 0).__class__ is int)
2490         self.assertTrue((hexint(0) << 12).__class__ is int)
2491         self.assertTrue((hexint(0) >> 12).__class__ is int)
2492
2493         class octlong(long):
2494             __slots__ = []
2495             def __str__(self):
2496                 s = oct(self)
2497                 if s[-1] == 'L':
2498                     s = s[:-1]
2499                 return s
2500             def __add__(self, other):
2501                 return self.__class__(super(octlong, self).__add__(other))
2502             __radd__ = __add__
2503         self.assertEqual(str(octlong(3) + 5), "010")
2504         # (Note that overriding __radd__ here only seems to work
2505         # because the example uses a short int left argument.)
2506         self.assertEqual(str(5 + octlong(3000)), "05675")
2507         a = octlong(12345)
2508         self.assertEqual(a, 12345L)
2509         self.assertEqual(long(a), 12345L)
2510         self.assertEqual(hash(a), hash(12345L))
2511         self.assertTrue(long(a).__class__ is long)
2512         self.assertTrue((+a).__class__ is long)
2513         self.assertTrue((-a).__class__ is long)
2514         self.assertTrue((-octlong(0)).__class__ is long)
2515         self.assertTrue((a >> 0).__class__ is long)
2516         self.assertTrue((a << 0).__class__ is long)
2517         self.assertTrue((a - 0).__class__ is long)
2518         self.assertTrue((a * 1).__class__ is long)
2519         self.assertTrue((a ** 1).__class__ is long)
2520         self.assertTrue((a // 1).__class__ is long)
2521         self.assertTrue((1 * a).__class__ is long)
2522         self.assertTrue((a | 0).__class__ is long)
2523         self.assertTrue((a ^ 0).__class__ is long)
2524         self.assertTrue((a & -1L).__class__ is long)
2525         self.assertTrue((octlong(0) << 12).__class__ is long)
2526         self.assertTrue((octlong(0) >> 12).__class__ is long)
2527         self.assertTrue(abs(octlong(0)).__class__ is long)
2528
2529         # Because octlong overrides __add__, we can't check the absence of +0
2530         # optimizations using octlong.
2531         class longclone(long):
2532             pass
2533         a = longclone(1)
2534         self.assertTrue((a + 0).__class__ is long)
2535         self.assertTrue((0 + a).__class__ is long)
2536
2537         # Check that negative clones don't segfault
2538         a = longclone(-1)
2539         self.assertEqual(a.__dict__, {})
2540         self.assertEqual(long(a), -1)  # self.assertTrue PyNumber_Long() copies the sign bit
2541
2542         class precfloat(float):
2543             __slots__ = ['prec']
2544             def __init__(self, value=0.0, prec=12):
2545                 self.prec = int(prec)
2546             def __repr__(self):
2547                 return "%.*g" % (self.prec, self)
2548         self.assertEqual(repr(precfloat(1.1)), "1.1")
2549         a = precfloat(12345)
2550         self.assertEqual(a, 12345.0)
2551         self.assertEqual(float(a), 12345.0)
2552         self.assertTrue(float(a).__class__ is float)
2553         self.assertEqual(hash(a), hash(12345.0))
2554         self.assertTrue((+a).__class__ is float)
2555
2556         class madcomplex(complex):
2557             def __repr__(self):
2558                 return "%.17gj%+.17g" % (self.imag, self.real)
2559         a = madcomplex(-3, 4)
2560         self.assertEqual(repr(a), "4j-3")
2561         base = complex(-3, 4)
2562         self.assertEqual(base.__class__, complex)
2563         self.assertEqual(a, base)
2564         self.assertEqual(complex(a), base)
2565         self.assertEqual(complex(a).__class__, complex)
2566         a = madcomplex(a)  # just trying another form of the constructor
2567         self.assertEqual(repr(a), "4j-3")
2568         self.assertEqual(a, base)
2569         self.assertEqual(complex(a), base)
2570         self.assertEqual(complex(a).__class__, complex)
2571         self.assertEqual(hash(a), hash(base))
2572         self.assertEqual((+a).__class__, complex)
2573         self.assertEqual((a + 0).__class__, complex)
2574         self.assertEqual(a + 0, base)
2575         self.assertEqual((a - 0).__class__, complex)
2576         self.assertEqual(a - 0, base)
2577         self.assertEqual((a * 1).__class__, complex)
2578         self.assertEqual(a * 1, base)
2579         self.assertEqual((a / 1).__class__, complex)
2580         self.assertEqual(a / 1, base)
2581
2582         class madtuple(tuple):
2583             _rev = None
2584             def rev(self):
2585                 if self._rev is not None:
2586                     return self._rev
2587                 L = list(self)
2588                 L.reverse()
2589                 self._rev = self.__class__(L)
2590                 return self._rev
2591         a = madtuple((1,2,3,4,5,6,7,8,9,0))
2592         self.assertEqual(a, (1,2,3,4,5,6,7,8,9,0))
2593         self.assertEqual(a.rev(), madtuple((0,9,8,7,6,5,4,3,2,1)))
2594         self.assertEqual(a.rev().rev(), madtuple((1,2,3,4,5,6,7,8,9,0)))
2595         for i in range(512):
2596             t = madtuple(range(i))
2597             u = t.rev()
2598             v = u.rev()
2599             self.assertEqual(v, t)
2600         a = madtuple((1,2,3,4,5))
2601         self.assertEqual(tuple(a), (1,2,3,4,5))
2602         self.assertTrue(tuple(a).__class__ is tuple)
2603         self.assertEqual(hash(a), hash((1,2,3,4,5)))
2604         self.assertTrue(a[:].__class__ is tuple)
2605         self.assertTrue((a * 1).__class__ is tuple)
2606         self.assertTrue((a * 0).__class__ is tuple)
2607         self.assertTrue((a + ()).__class__ is tuple)
2608         a = madtuple(())
2609         self.assertEqual(tuple(a), ())
2610         self.assertTrue(tuple(a).__class__ is tuple)
2611         self.assertTrue((a + a).__class__ is tuple)
2612         self.assertTrue((a * 0).__class__ is tuple)
2613         self.assertTrue((a * 1).__class__ is tuple)
2614         self.assertTrue((a * 2).__class__ is tuple)
2615         self.assertTrue(a[:].__class__ is tuple)
2616
2617         class madstring(str):
2618             _rev = None
2619             def rev(self):
2620                 if self._rev is not None:
2621                     return self._rev
2622                 L = list(self)
2623                 L.reverse()
2624                 self._rev = self.__class__("".join(L))
2625                 return self._rev
2626         s = madstring("abcdefghijklmnopqrstuvwxyz")
2627         self.assertEqual(s, "abcdefghijklmnopqrstuvwxyz")
2628         self.assertEqual(s.rev(), madstring("zyxwvutsrqponmlkjihgfedcba"))
2629         self.assertEqual(s.rev().rev(), madstring("abcdefghijklmnopqrstuvwxyz"))
2630         for i in range(256):
2631             s = madstring("".join(map(chr, range(i))))
2632             t = s.rev()
2633             u = t.rev()
2634             self.assertEqual(u, s)
2635         s = madstring("12345")
2636         self.assertEqual(str(s), "12345")
2637         self.assertTrue(str(s).__class__ is str)
2638
2639         base = "\x00" * 5
2640         s = madstring(base)
2641         self.assertEqual(s, base)
2642         self.assertEqual(str(s), base)
2643         self.assertTrue(str(s).__class__ is str)
2644         self.assertEqual(hash(s), hash(base))
2645         self.assertEqual({s: 1}[base], 1)
2646         self.assertEqual({base: 1}[s], 1)
2647         self.assertTrue((s + "").__class__ is str)
2648         self.assertEqual(s + "", base)
2649         self.assertTrue(("" + s).__class__ is str)
2650         self.assertEqual("" + s, base)
2651         self.assertTrue((s * 0).__class__ is str)
2652         self.assertEqual(s * 0, "")
2653         self.assertTrue((s * 1).__class__ is str)
2654         self.assertEqual(s * 1, base)
2655         self.assertTrue((s * 2).__class__ is str)
2656         self.assertEqual(s * 2, base + base)
2657         self.assertTrue(s[:].__class__ is str)
2658         self.assertEqual(s[:], base)
2659         self.assertTrue(s[0:0].__class__ is str)
2660         self.assertEqual(s[0:0], "")
2661         self.assertTrue(s.strip().__class__ is str)
2662         self.assertEqual(s.strip(), base)
2663         self.assertTrue(s.lstrip().__class__ is str)
2664         self.assertEqual(s.lstrip(), base)
2665         self.assertTrue(s.rstrip().__class__ is str)
2666         self.assertEqual(s.rstrip(), base)
2667         identitytab = ''.join([chr(i) for i in range(256)])
2668         self.assertTrue(s.translate(identitytab).__class__ is str)
2669         self.assertEqual(s.translate(identitytab), base)
2670         self.assertTrue(s.translate(identitytab, "x").__class__ is str)
2671         self.assertEqual(s.translate(identitytab, "x"), base)
2672         self.assertEqual(s.translate(identitytab, "\x00"), "")
2673         self.assertTrue(s.replace("x", "x").__class__ is str)
2674         self.assertEqual(s.replace("x", "x"), base)
2675         self.assertTrue(s.ljust(len(s)).__class__ is str)
2676         self.assertEqual(s.ljust(len(s)), base)
2677         self.assertTrue(s.rjust(len(s)).__class__ is str)
2678         self.assertEqual(s.rjust(len(s)), base)
2679         self.assertTrue(s.center(len(s)).__class__ is str)
2680         self.assertEqual(s.center(len(s)), base)
2681         self.assertTrue(s.lower().__class__ is str)
2682         self.assertEqual(s.lower(), base)
2683
2684         class madunicode(unicode):
2685             _rev = None
2686             def rev(self):
2687                 if self._rev is not None:
2688                     return self._rev
2689                 L = list(self)
2690                 L.reverse()
2691                 self._rev = self.__class__(u"".join(L))
2692                 return self._rev
2693         u = madunicode("ABCDEF")
2694         self.assertEqual(u, u"ABCDEF")
2695         self.assertEqual(u.rev(), madunicode(u"FEDCBA"))
2696         self.assertEqual(u.rev().rev(), madunicode(u"ABCDEF"))
2697         base = u"12345"
2698         u = madunicode(base)
2699         self.assertEqual(unicode(u), base)
2700         self.assertTrue(unicode(u).__class__ is unicode)
2701         self.assertEqual(hash(u), hash(base))
2702         self.assertEqual({u: 1}[base], 1)
2703         self.assertEqual({base: 1}[u], 1)
2704         self.assertTrue(u.strip().__class__ is unicode)
2705         self.assertEqual(u.strip(), base)
2706         self.assertTrue(u.lstrip().__class__ is unicode)
2707         self.assertEqual(u.lstrip(), base)
2708         self.assertTrue(u.rstrip().__class__ is unicode)
2709         self.assertEqual(u.rstrip(), base)
2710         self.assertTrue(u.replace(u"x", u"x").__class__ is unicode)
2711         self.assertEqual(u.replace(u"x", u"x"), base)
2712         self.assertTrue(u.replace(u"xy", u"xy").__class__ is unicode)
2713         self.assertEqual(u.replace(u"xy", u"xy"), base)
2714         self.assertTrue(u.center(len(u)).__class__ is unicode)
2715         self.assertEqual(u.center(len(u)), base)
2716         self.assertTrue(u.ljust(len(u)).__class__ is unicode)
2717         self.assertEqual(u.ljust(len(u)), base)
2718         self.assertTrue(u.rjust(len(u)).__class__ is unicode)
2719         self.assertEqual(u.rjust(len(u)), base)
2720         self.assertTrue(u.lower().__class__ is unicode)
2721         self.assertEqual(u.lower(), base)
2722         self.assertTrue(u.upper().__class__ is unicode)
2723         self.assertEqual(u.upper(), base)
2724         self.assertTrue(u.capitalize().__class__ is unicode)
2725         self.assertEqual(u.capitalize(), base)
2726         self.assertTrue(u.title().__class__ is unicode)
2727         self.assertEqual(u.title(), base)
2728         self.assertTrue((u + u"").__class__ is unicode)
2729         self.assertEqual(u + u"", base)
2730         self.assertTrue((u"" + u).__class__ is unicode)
2731         self.assertEqual(u"" + u, base)
2732         self.assertTrue((u * 0).__class__ is unicode)
2733         self.assertEqual(u * 0, u"")
2734         self.assertTrue((u * 1).__class__ is unicode)
2735         self.assertEqual(u * 1, base)
2736         self.assertTrue((u * 2).__class__ is unicode)
2737         self.assertEqual(u * 2, base + base)
2738         self.assertTrue(u[:].__class__ is unicode)
2739         self.assertEqual(u[:], base)
2740         self.assertTrue(u[0:0].__class__ is unicode)
2741         self.assertEqual(u[0:0], u"")
2742
2743         class sublist(list):
2744             pass
2745         a = sublist(range(5))
2746         self.assertEqual(a, range(5))
2747         a.append("hello")
2748         self.assertEqual(a, range(5) + ["hello"])
2749         a[5] = 5
2750         self.assertEqual(a, range(6))
2751         a.extend(range(6, 20))
2752         self.assertEqual(a, range(20))
2753         a[-5:] = []
2754         self.assertEqual(a, range(15))
2755         del a[10:15]
2756         self.assertEqual(len(a), 10)
2757         self.assertEqual(a, range(10))
2758         self.assertEqual(list(a), range(10))
2759         self.assertEqual(a[0], 0)
2760         self.assertEqual(a[9], 9)
2761         self.assertEqual(a[-10], 0)
2762         self.assertEqual(a[-1], 9)
2763         self.assertEqual(a[:5], range(5))
2764
2765         class CountedInput(file):
2766             """Counts lines read by self.readline().
2767
2768             self.lineno is the 0-based ordinal of the last line read, up to
2769             a maximum of one greater than the number of lines in the file.
2770
2771             self.ateof is true if and only if the final "" line has been read,
2772             at which point self.lineno stops incrementing, and further calls
2773             to readline() continue to return "".
2774             """
2775
2776             lineno = 0
2777             ateof = 0
2778             def readline(self):
2779                 if self.ateof:
2780                     return ""
2781                 s = file.readline(self)
2782                 # Next line works too.
2783                 # s = super(CountedInput, self).readline()
2784                 self.lineno += 1
2785                 if s == "":
2786                     self.ateof = 1
2787                 return s
2788
2789         f = file(name=test_support.TESTFN, mode='w')
2790         lines = ['a\n', 'b\n', 'c\n']
2791         try:
2792             f.writelines(lines)
2793             f.close()
2794             f = CountedInput(test_support.TESTFN)
2795             for (i, expected) in zip(range(1, 5) + [4], lines + 2 * [""]):
2796                 got = f.readline()
2797                 self.assertEqual(expected, got)
2798                 self.assertEqual(f.lineno, i)
2799                 self.assertEqual(f.ateof, (i > len(lines)))
2800             f.close()
2801         finally:
2802             try:
2803                 f.close()
2804             except:
2805                 pass
2806             test_support.unlink(test_support.TESTFN)
2807
2808     def test_keywords(self):
2809         # Testing keyword args to basic type constructors ...
2810         self.assertEqual(int(x=1), 1)
2811         self.assertEqual(float(x=2), 2.0)
2812         self.assertEqual(long(x=3), 3L)
2813         self.assertEqual(complex(imag=42, real=666), complex(666, 42))
2814         self.assertEqual(str(object=500), '500')
2815         self.assertEqual(unicode(string='abc', errors='strict'), u'abc')
2816         self.assertEqual(tuple(sequence=range(3)), (0, 1, 2))
2817         self.assertEqual(list(sequence=(0, 1, 2)), range(3))
2818         # note: as of Python 2.3, dict() no longer has an "items" keyword arg
2819
2820         for constructor in (int, float, long, complex, str, unicode,
2821                             tuple, list, file):
2822             try:
2823                 constructor(bogus_keyword_arg=1)
2824             except TypeError:
2825                 pass
2826             else:
2827                 self.fail("expected TypeError from bogus keyword argument to %r"
2828                             % constructor)
2829
2830     def test_str_subclass_as_dict_key(self):
2831         # Testing a str subclass used as dict key ..
2832
2833         class cistr(str):
2834             """Sublcass of str that computes __eq__ case-insensitively.
2835
2836             Also computes a hash code of the string in canonical form.
2837             """
2838
2839             def __init__(self, value):
2840                 self.canonical = value.lower()
2841                 self.hashcode = hash(self.canonical)
2842
2843             def __eq__(self, other):
2844                 if not isinstance(other, cistr):
2845                     other = cistr(other)
2846                 return self.canonical == other.canonical
2847
2848             def __hash__(self):
2849                 return self.hashcode
2850
2851         self.assertEqual(cistr('ABC'), 'abc')
2852         self.assertEqual('aBc', cistr('ABC'))
2853         self.assertEqual(str(cistr('ABC')), 'ABC')
2854
2855         d = {cistr('one'): 1, cistr('two'): 2, cistr('tHree'): 3}
2856         self.assertEqual(d[cistr('one')], 1)
2857         self.assertEqual(d[cistr('tWo')], 2)
2858         self.assertEqual(d[cistr('THrEE')], 3)
2859         self.assertIn(cistr('ONe'), d)
2860         self.assertEqual(d.get(cistr('thrEE')), 3)
2861
2862     def test_classic_comparisons(self):
2863         # Testing classic comparisons...
2864         class classic:
2865             pass
2866
2867         for base in (classic, int, object):
2868             class C(base):
2869                 def __init__(self, value):
2870                     self.value = int(value)
2871                 def __cmp__(self, other):
2872                     if isinstance(other, C):
2873                         return cmp(self.value, other.value)
2874                     if isinstance(other, int) or isinstance(other, long):
2875                         return cmp(self.value, other)
2876                     return NotImplemented
2877                 __hash__ = None # Silence Py3k warning
2878
2879             c1 = C(1)
2880             c2 = C(2)
2881             c3 = C(3)
2882             self.assertEqual(c1, 1)
2883             c = {1: c1, 2: c2, 3: c3}
2884             for x in 1, 2, 3:
2885                 for y in 1, 2, 3:
2886                     self.assertTrue(cmp(c[x], c[y]) == cmp(x, y), "x=%d, y=%d" % (x, y))
2887                     for op in "<", "<=", "==", "!=", ">", ">=":
2888                         self.assertTrue(eval("c[x] %s c[y]" % op) == eval("x %s y" % op),
2889                                "x=%d, y=%d" % (x, y))
2890                     self.assertTrue(cmp(c[x], y) == cmp(x, y), "x=%d, y=%d" % (x, y))
2891                     self.assertTrue(cmp(x, c[y]) == cmp(x, y), "x=%d, y=%d" % (x, y))
2892
2893     def test_rich_comparisons(self):
2894         # Testing rich comparisons...
2895         class Z(complex):
2896             pass
2897         z = Z(1)
2898         self.assertEqual(z, 1+0j)
2899         self.assertEqual(1+0j, z)
2900         class ZZ(complex):
2901             def __eq__(self, other):
2902                 try:
2903                     return abs(self - other) <= 1e-6
2904                 except:
2905                     return NotImplemented
2906             __hash__ = None # Silence Py3k warning
2907         zz = ZZ(1.0000003)
2908         self.assertEqual(zz, 1+0j)
2909         self.assertEqual(1+0j, zz)
2910
2911         class classic:
2912             pass
2913         for base in (classic, int, object, list):
2914             class C(base):
2915                 def __init__(self, value):
2916                     self.value = int(value)
2917                 def __cmp__(self_, other):
2918                     self.fail("shouldn't call __cmp__")
2919                 __hash__ = None # Silence Py3k warning
2920                 def __eq__(self, other):
2921                     if isinstance(other, C):
2922                         return self.value == other.value
2923                     if isinstance(other, int) or isinstance(other, long):
2924                         return self.value == other
2925                     return NotImplemented
2926                 def __ne__(self, other):
2927                     if isinstance(other, C):
2928                         return self.value != other.value
2929                     if isinstance(other, int) or isinstance(other, long):
2930                         return self.value != other
2931                     return NotImplemented
2932                 def __lt__(self, other):
2933                     if isinstance(other, C):
2934                         return self.value < other.value
2935                     if isinstance(other, int) or isinstance(other, long):
2936                         return self.value < other
2937                     return NotImplemented
2938                 def __le__(self, other):
2939                     if isinstance(other, C):
2940                         return self.value <= other.value
2941                     if isinstance(other, int) or isinstance(other, long):
2942                         return self.value <= other
2943                     return NotImplemented
2944                 def __gt__(self, other):
2945                     if isinstance(other, C):
2946                         return self.value > other.value
2947                     if isinstance(other, int) or isinstance(other, long):
2948                         return self.value > other
2949                     return NotImplemented
2950                 def __ge__(self, other):
2951                     if isinstance(other, C):
2952                         return self.value >= other.value
2953                     if isinstance(other, int) or isinstance(other, long):
2954                         return self.value >= other
2955                     return NotImplemented
2956             c1 = C(1)
2957             c2 = C(2)
2958             c3 = C(3)
2959             self.assertEqual(c1, 1)
2960             c = {1: c1, 2: c2, 3: c3}
2961             for x in 1, 2, 3:
2962                 for y in 1, 2, 3:
2963                     for op in "<", "<=", "==", "!=", ">", ">=":
2964                         self.assertTrue(eval("c[x] %s c[y]" % op) == eval("x %s y" % op),
2965                                "x=%d, y=%d" % (x, y))
2966                         self.assertTrue(eval("c[x] %s y" % op) == eval("x %s y" % op),
2967                                "x=%d, y=%d" % (x, y))
2968                         self.assertTrue(eval("x %s c[y]" % op) == eval("x %s y" % op),
2969                                "x=%d, y=%d" % (x, y))
2970
2971     def test_coercions(self):
2972         # Testing coercions...
2973         class I(int): pass
2974         coerce(I(0), 0)
2975         coerce(0, I(0))
2976         class L(long): pass
2977         coerce(L(0), 0)
2978         coerce(L(0), 0L)
2979         coerce(0, L(0))
2980         coerce(0L, L(0))
2981         class F(float): pass
2982         coerce(F(0), 0)
2983         coerce(F(0), 0L)
2984         coerce(F(0), 0.)
2985         coerce(0, F(0))
2986         coerce(0L, F(0))
2987         coerce(0., F(0))
2988         class C(complex): pass
2989         coerce(C(0), 0)
2990         coerce(C(0), 0L)
2991         coerce(C(0), 0.)
2992         coerce(C(0), 0j)
2993         coerce(0, C(0))
2994         coerce(0L, C(0))
2995         coerce(0., C(0))
2996         coerce(0j, C(0))
2997
2998     def test_descrdoc(self):
2999         # Testing descriptor doc strings...
3000         def check(descr, what):
3001             self.assertEqual(descr.__doc__, what)
3002         check(file.closed, "True if the file is closed") # getset descriptor
3003         check(file.name, "file name") # member descriptor
3004
3005     def test_doc_descriptor(self):
3006         # Testing __doc__ descriptor...
3007         # SF bug 542984
3008         class DocDescr(object):
3009             def __get__(self, object, otype):
3010                 if object:
3011                     object = object.__class__.__name__ + ' instance'
3012                 if otype:
3013                     otype = otype.__name__
3014                 return 'object=%s; type=%s' % (object, otype)
3015         class OldClass:
3016             __doc__ = DocDescr()
3017         class NewClass(object):
3018             __doc__ = DocDescr()
3019         self.assertEqual(OldClass.__doc__, 'object=None; type=OldClass')
3020         self.assertEqual(OldClass().__doc__, 'object=OldClass instance; type=OldClass')
3021         self.assertEqual(NewClass.__doc__, 'object=None; type=NewClass')
3022         self.assertEqual(NewClass().__doc__, 'object=NewClass instance; type=NewClass')
3023
3024     def test_set_class(self):
3025         # Testing __class__ assignment...
3026         class C(object): pass
3027         class D(object): pass
3028         class E(object): pass
3029         class F(D, E): pass
3030         for cls in C, D, E, F:
3031             for cls2 in C, D, E, F:
3032                 x = cls()
3033                 x.__class__ = cls2
3034                 self.assertTrue(x.__class__ is cls2)
3035                 x.__class__ = cls
3036                 self.assertTrue(x.__class__ is cls)
3037         def cant(x, C):
3038             try:
3039                 x.__class__ = C
3040             except TypeError:
3041                 pass
3042             else:
3043                 self.fail("shouldn't allow %r.__class__ = %r" % (x, C))
3044             try:
3045                 delattr(x, "__class__")
3046             except (TypeError, AttributeError):
3047                 pass
3048             else:
3049                 self.fail("shouldn't allow del %r.__class__" % x)
3050         cant(C(), list)
3051         cant(list(), C)
3052         cant(C(), 1)
3053         cant(C(), object)
3054         cant(object(), list)
3055         cant(list(), object)
3056         class Int(int): __slots__ = []
3057         cant(2, Int)
3058         cant(Int(), int)
3059         cant(True, int)
3060         cant(2, bool)
3061         o = object()
3062         cant(o, type(1))
3063         cant(o, type(None))
3064         del o
3065         class G(object):
3066             __slots__ = ["a", "b"]
3067         class H(object):
3068             __slots__ = ["b", "a"]
3069         try:
3070             unicode
3071         except NameError:
3072             class I(object):
3073                 __slots__ = ["a", "b"]
3074         else:
3075             class I(object):
3076                 __slots__ = [unicode("a"), unicode("b")]
3077         class J(object):
3078             __slots__ = ["c", "b"]
3079         class K(object):
3080             __slots__ = ["a", "b", "d"]
3081         class L(H):
3082             __slots__ = ["e"]
3083         class M(I):
3084             __slots__ = ["e"]
3085         class N(J):
3086             __slots__ = ["__weakref__"]
3087         class P(J):
3088             __slots__ = ["__dict__"]
3089         class Q(J):
3090             pass
3091         class R(J):
3092             __slots__ = ["__dict__", "__weakref__"]
3093
3094         for cls, cls2 in ((G, H), (G, I), (I, H), (Q, R), (R, Q)):
3095             x = cls()
3096             x.a = 1
3097             x.__class__ = cls2
3098             self.assertTrue(x.__class__ is cls2,
3099                    "assigning %r as __class__ for %r silently failed" % (cls2, x))
3100             self.assertEqual(x.a, 1)
3101             x.__class__ = cls
3102             self.assertTrue(x.__class__ is cls,
3103                    "assigning %r as __class__ for %r silently failed" % (cls, x))
3104             self.assertEqual(x.a, 1)
3105         for cls in G, J, K, L, M, N, P, R, list, Int:
3106             for cls2 in G, J, K, L, M, N, P, R, list, Int:
3107                 if cls is cls2:
3108                     continue
3109                 cant(cls(), cls2)
3110
3111         # Issue5283: when __class__ changes in __del__, the wrong
3112         # type gets DECREF'd.
3113         class O(object):
3114             pass
3115         class A(object):
3116             def __del__(self):
3117                 self.__class__ = O
3118         l = [A() for x in range(100)]
3119         del l
3120
3121     def test_set_dict(self):
3122         # Testing __dict__ assignment...
3123         class C(object): pass
3124         a = C()
3125         a.__dict__ = {'b': 1}
3126         self.assertEqual(a.b, 1)
3127         def cant(x, dict):
3128             try:
3129                 x.__dict__ = dict
3130             except (AttributeError, TypeError):
3131                 pass
3132             else:
3133                 self.fail("shouldn't allow %r.__dict__ = %r" % (x, dict))
3134         cant(a, None)
3135         cant(a, [])
3136         cant(a, 1)
3137         del a.__dict__ # Deleting __dict__ is allowed
3138
3139         class Base(object):
3140             pass
3141         def verify_dict_readonly(x):
3142             """
3143             x has to be an instance of a class inheriting from Base.
3144             """
3145             cant(x, {})
3146             try:
3147                 del x.__dict__
3148             except (AttributeError, TypeError):
3149                 pass
3150             else:
3151                 self.fail("shouldn't allow del %r.__dict__" % x)
3152             dict_descr = Base.__dict__["__dict__"]
3153             try:
3154                 dict_descr.__set__(x, {})
3155             except (AttributeError, TypeError):
3156                 pass
3157             else:
3158                 self.fail("dict_descr allowed access to %r's dict" % x)
3159
3160         # Classes don't allow __dict__ assignment and have readonly dicts
3161         class Meta1(type, Base):
3162             pass
3163         class Meta2(Base, type):
3164             pass
3165         class D(object):
3166             __metaclass__ = Meta1
3167         class E(object):
3168             __metaclass__ = Meta2
3169         for cls in C, D, E:
3170             verify_dict_readonly(cls)
3171             class_dict = cls.__dict__
3172             try:
3173                 class_dict["spam"] = "eggs"
3174             except TypeError:
3175                 pass
3176             else:
3177                 self.fail("%r's __dict__ can be modified" % cls)
3178
3179         # Modules also disallow __dict__ assignment
3180         class Module1(types.ModuleType, Base):
3181             pass
3182         class Module2(Base, types.ModuleType):
3183             pass
3184         for ModuleType in Module1, Module2:
3185             mod = ModuleType("spam")
3186             verify_dict_readonly(mod)
3187             mod.__dict__["spam"] = "eggs"
3188
3189         # Exception's __dict__ can be replaced, but not deleted
3190         # (at least not any more than regular exception's __dict__ can
3191         # be deleted; on CPython it is not the case, whereas on PyPy they
3192         # can, just like any other new-style instance's __dict__.)
3193         def can_delete_dict(e):
3194             try:
3195                 del e.__dict__
3196             except (TypeError, AttributeError):
3197                 return False
3198             else:
3199                 return True
3200         class Exception1(Exception, Base):
3201             pass
3202         class Exception2(Base, Exception):
3203             pass
3204         for ExceptionType in Exception, Exception1, Exception2:
3205             e = ExceptionType()
3206             e.__dict__ = {"a": 1}
3207             self.assertEqual(e.a, 1)
3208             self.assertEqual(can_delete_dict(e), can_delete_dict(ValueError()))
3209
3210     def test_pickles(self):
3211         # Testing pickling and copying new-style classes and objects...
3212         import pickle, cPickle
3213
3214         def sorteditems(d):
3215             L = d.items()
3216             L.sort()
3217             return L
3218
3219         global C
3220         class C(object):
3221             def __init__(self, a, b):
3222                 super(C, self).__init__()
3223                 self.a = a
3224                 self.b = b
3225             def __repr__(self):
3226                 return "C(%r, %r)" % (self.a, self.b)
3227
3228         global C1
3229         class C1(list):
3230             def __new__(cls, a, b):
3231                 return super(C1, cls).__new__(cls)
3232             def __getnewargs__(self):
3233                 return (self.a, self.b)
3234             def __init__(self, a, b):
3235                 self.a = a
3236                 self.b = b
3237             def __repr__(self):
3238                 return "C1(%r, %r)<%r>" % (self.a, self.b, list(self))
3239
3240         global C2
3241         class C2(int):
3242             def __new__(cls, a, b, val=0):
3243                 return super(C2, cls).__new__(cls, val)
3244             def __getnewargs__(self):
3245                 return (self.a, self.b, int(self))
3246             def __init__(self, a, b, val=0):
3247                 self.a = a
3248                 self.b = b
3249             def __repr__(self):
3250                 return "C2(%r, %r)<%r>" % (self.a, self.b, int(self))
3251
3252         global C3
3253         class C3(object):
3254             def __init__(self, foo):
3255                 self.foo = foo
3256             def __getstate__(self):
3257                 return self.foo
3258             def __setstate__(self, foo):
3259                 self.foo = foo
3260
3261         global C4classic, C4
3262         class C4classic: # classic
3263             pass
3264         class C4(C4classic, object): # mixed inheritance
3265             pass
3266
3267         for p in pickle, cPickle:
3268             for bin in 0, 1:
3269                 for cls in C, C1, C2:
3270                     s = p.dumps(cls, bin)
3271                     cls2 = p.loads(s)
3272                     self.assertTrue(cls2 is cls)
3273
3274                 a = C1(1, 2); a.append(42); a.append(24)
3275                 b = C2("hello", "world", 42)
3276                 s = p.dumps((a, b), bin)
3277                 x, y = p.loads(s)
3278                 self.assertEqual(x.__class__, a.__class__)
3279                 self.assertEqual(sorteditems(x.__dict__), sorteditems(a.__dict__))
3280                 self.assertEqual(y.__class__, b.__class__)
3281                 self.assertEqual(sorteditems(y.__dict__), sorteditems(b.__dict__))
3282                 self.assertEqual(repr(x), repr(a))
3283                 self.assertEqual(repr(y), repr(b))
3284                 # Test for __getstate__ and __setstate__ on new style class
3285                 u = C3(42)
3286                 s = p.dumps(u, bin)
3287                 v = p.loads(s)
3288                 self.assertEqual(u.__class__, v.__class__)
3289                 self.assertEqual(u.foo, v.foo)
3290                 # Test for picklability of hybrid class
3291                 u = C4()
3292                 u.foo = 42
3293                 s = p.dumps(u, bin)
3294                 v = p.loads(s)
3295                 self.assertEqual(u.__class__, v.__class__)
3296                 self.assertEqual(u.foo, v.foo)
3297
3298         # Testing copy.deepcopy()
3299         import copy
3300         for cls in C, C1, C2:
3301             cls2 = copy.deepcopy(cls)
3302             self.assertTrue(cls2 is cls)
3303
3304         a = C1(1, 2); a.append(42); a.append(24)
3305         b = C2("hello", "world", 42)
3306         x, y = copy.deepcopy((a, b))
3307         self.assertEqual(x.__class__, a.__class__)
3308         self.assertEqual(sorteditems(x.__dict__), sorteditems(a.__dict__))
3309         self.assertEqual(y.__class__, b.__class__)
3310         self.assertEqual(sorteditems(y.__dict__), sorteditems(b.__dict__))
3311         self.assertEqual(repr(x), repr(a))
3312         self.assertEqual(repr(y), repr(b))
3313
3314     def test_pickle_slots(self):
3315         # Testing pickling of classes with __slots__ ...
3316         import pickle, cPickle
3317         # Pickling of classes with __slots__ but without __getstate__ should fail
3318         global B, C, D, E
3319         class B(object):
3320             pass
3321         for base in [object, B]:
3322             class C(base):
3323                 __slots__ = ['a']
3324             class D(C):
3325                 pass
3326             try:
3327                 pickle.dumps(C())
3328             except TypeError:
3329                 pass
3330             else:
3331                 self.fail("should fail: pickle C instance - %s" % base)
3332             try:
3333                 cPickle.dumps(C())
3334             except TypeError:
3335                 pass
3336             else:
3337                 self.fail("should fail: cPickle C instance - %s" % base)
3338             try:
3339                 pickle.dumps(C())
3340             except TypeError:
3341                 pass
3342             else:
3343                 self.fail("should fail: pickle D instance - %s" % base)
3344             try:
3345                 cPickle.dumps(D())
3346             except TypeError:
3347                 pass
3348             else:
3349                 self.fail("should fail: cPickle D instance - %s" % base)
3350             # Give C a nice generic __getstate__ and __setstate__
3351             class C(base):
3352                 __slots__ = ['a']
3353                 def __getstate__(self):
3354                     try:
3355                         d = self.__dict__.copy()
3356                     except AttributeError:
3357                         d = {}
3358                     for cls in self.__class__.__mro__:
3359                         for sn in cls.__dict__.get('__slots__', ()):
3360                             try:
3361                                 d[sn] = getattr(self, sn)
3362                             except AttributeError:
3363                                 pass
3364                     return d
3365                 def __setstate__(self, d):
3366                     for k, v in d.items():
3367                         setattr(self, k, v)
3368             class D(C):
3369                 pass
3370             # Now it should work
3371             x = C()
3372             y = pickle.loads(pickle.dumps(x))
3373             self.assertEqual(hasattr(y, 'a'), 0)
3374             y = cPickle.loads(cPickle.dumps(x))
3375             self.assertEqual(hasattr(y, 'a'), 0)
3376             x.a = 42
3377             y = pickle.loads(pickle.dumps(x))
3378             self.assertEqual(y.a, 42)
3379             y = cPickle.loads(cPickle.dumps(x))
3380             self.assertEqual(y.a, 42)
3381             x = D()
3382             x.a = 42
3383             x.b = 100
3384             y = pickle.loads(pickle.dumps(x))
3385             self.assertEqual(y.a + y.b, 142)
3386             y = cPickle.loads(cPickle.dumps(x))
3387             self.assertEqual(y.a + y.b, 142)
3388             # A subclass that adds a slot should also work
3389             class E(C):
3390                 __slots__ = ['b']
3391             x = E()
3392             x.a = 42
3393             x.b = "foo"
3394             y = pickle.loads(pickle.dumps(x))
3395             self.assertEqual(y.a, x.a)
3396             self.assertEqual(y.b, x.b)
3397             y = cPickle.loads(cPickle.dumps(x))
3398             self.assertEqual(y.a, x.a)
3399             self.assertEqual(y.b, x.b)
3400
3401     def test_binary_operator_override(self):
3402         # Testing overrides of binary operations...
3403         class I(int):
3404             def __repr__(self):
3405                 return "I(%r)" % int(self)
3406             def __add__(self, other):
3407                 return I(int(self) + int(other))
3408             __radd__ = __add__
3409             def __pow__(self, other, mod=None):
3410                 if mod is None:
3411                     return I(pow(int(self), int(other)))
3412                 else:
3413                     return I(pow(int(self), int(other), int(mod)))
3414             def __rpow__(self, other, mod=None):
3415                 if mod is None:
3416                     return I(pow(int(other), int(self), mod))
3417                 else:
3418                     return I(pow(int(other), int(self), int(mod)))
3419
3420         self.assertEqual(repr(I(1) + I(2)), "I(3)")
3421         self.assertEqual(repr(I(1) + 2), "I(3)")
3422         self.assertEqual(repr(1 + I(2)), "I(3)")
3423         self.assertEqual(repr(I(2) ** I(3)), "I(8)")
3424         self.assertEqual(repr(2 ** I(3)), "I(8)")
3425         self.assertEqual(repr(I(2) ** 3), "I(8)")
3426         self.assertEqual(repr(pow(I(2), I(3), I(5))), "I(3)")
3427         class S(str):
3428             def __eq__(self, other):
3429                 return self.lower() == other.lower()
3430             __hash__ = None # Silence Py3k warning
3431
3432     def test_subclass_propagation(self):
3433         # Testing propagation of slot functions to subclasses...
3434         class A(object):
3435             pass
3436         class B(A):
3437             pass
3438         class C(A):
3439             pass
3440         class D(B, C):
3441             pass
3442         d = D()
3443         orig_hash = hash(d) # related to id(d) in platform-dependent ways
3444         A.__hash__ = lambda self: 42
3445         self.assertEqual(hash(d), 42)
3446         C.__hash__ = lambda self: 314
3447         self.assertEqual(hash(d), 314)
3448         B.__hash__ = lambda self: 144
3449         self.assertEqual(hash(d), 144)
3450         D.__hash__ = lambda self: 100
3451         self.assertEqual(hash(d), 100)
3452         D.__hash__ = None
3453         self.assertRaises(TypeError, hash, d)
3454         del D.__hash__
3455         self.assertEqual(hash(d), 144)
3456         B.__hash__ = None
3457         self.assertRaises(TypeError, hash, d)
3458         del B.__hash__
3459         self.assertEqual(hash(d), 314)
3460         C.__hash__ = None
3461         self.assertRaises(TypeError, hash, d)
3462         del C.__hash__
3463         self.assertEqual(hash(d), 42)
3464         A.__hash__ = None
3465         self.assertRaises(TypeError, hash, d)
3466         del A.__hash__
3467         self.assertEqual(hash(d), orig_hash)
3468         d.foo = 42
3469         d.bar = 42
3470         self.assertEqual(d.foo, 42)
3471         self.assertEqual(d.bar, 42)
3472         def __getattribute__(self, name):
3473             if name == "foo":
3474                 return 24
3475             return object.__getattribute__(self, name)
3476         A.__getattribute__ = __getattribute__
3477         self.assertEqual(d.foo, 24)
3478         self.assertEqual(d.bar, 42)
3479         def __getattr__(self, name):
3480             if name in ("spam", "foo", "bar"):
3481                 return "hello"
3482             raise AttributeError, name
3483         B.__getattr__ = __getattr__
3484         self.assertEqual(d.spam, "hello")
3485         self.assertEqual(d.foo, 24)
3486         self.assertEqual(d.bar, 42)
3487         del A.__getattribute__
3488         self.assertEqual(d.foo, 42)
3489         del d.foo
3490         self.assertEqual(d.foo, "hello")
3491         self.assertEqual(d.bar, 42)
3492         del B.__getattr__
3493         try:
3494             d.foo
3495         except AttributeError:
3496             pass
3497         else:
3498             self.fail("d.foo should be undefined now")
3499
3500         # Test a nasty bug in recurse_down_subclasses()
3501         class A(object):
3502             pass
3503         class B(A):
3504             pass
3505         del B
3506         test_support.gc_collect()
3507         A.__setitem__ = lambda *a: None # crash
3508
3509     def test_buffer_inheritance(self):
3510         # Testing that buffer interface is inherited ...
3511
3512         import binascii
3513         # SF bug [#470040] ParseTuple t# vs subclasses.
3514
3515         class MyStr(str):
3516             pass
3517         base = 'abc'
3518         m = MyStr(base)
3519         # b2a_hex uses the buffer interface to get its argument's value, via
3520         # PyArg_ParseTuple 't#' code.
3521         self.assertEqual(binascii.b2a_hex(m), binascii.b2a_hex(base))
3522
3523         # It's not clear that unicode will continue to support the character
3524         # buffer interface, and this test will fail if that's taken away.
3525         class MyUni(unicode):
3526             pass
3527         base = u'abc'
3528         m = MyUni(base)
3529         self.assertEqual(binascii.b2a_hex(m), binascii.b2a_hex(base))
3530
3531         class MyInt(int):
3532             pass
3533         m = MyInt(42)
3534         try:
3535             binascii.b2a_hex(m)
3536             self.fail('subclass of int should not have a buffer interface')
3537         except TypeError:
3538             pass
3539
3540     def test_str_of_str_subclass(self):
3541         # Testing __str__ defined in subclass of str ...
3542         import binascii
3543         import cStringIO
3544
3545         class octetstring(str):
3546             def __str__(self):
3547                 return binascii.b2a_hex(self)
3548             def __repr__(self):
3549                 return self + " repr"
3550
3551         o = octetstring('A')
3552         self.assertEqual(type(o), octetstring)
3553         self.assertEqual(type(str(o)), str)
3554         self.assertEqual(type(repr(o)), str)
3555         self.assertEqual(ord(o), 0x41)
3556         self.assertEqual(str(o), '41')
3557         self.assertEqual(repr(o), 'A repr')
3558         self.assertEqual(o.__str__(), '41')
3559         self.assertEqual(o.__repr__(), 'A repr')
3560
3561         capture = cStringIO.StringIO()
3562         # Calling str() or not exercises different internal paths.
3563         print >> capture, o
3564         print >> capture, str(o)
3565         self.assertEqual(capture.getvalue(), '41\n41\n')
3566         capture.close()
3567
3568     def test_keyword_arguments(self):
3569         # Testing keyword arguments to __init__, __call__...
3570         def f(a): return a
3571         self.assertEqual(f.__call__(a=42), 42)
3572         a = []
3573         list.__init__(a, sequence=[0, 1, 2])
3574         self.assertEqual(a, [0, 1, 2])
3575
3576     def test_recursive_call(self):
3577         # Testing recursive __call__() by setting to instance of class...
3578         class A(object):
3579             pass
3580
3581         A.__call__ = A()
3582         try:
3583             A()()
3584         except RuntimeError:
3585             pass
3586         else:
3587             self.fail("Recursion limit should have been reached for __call__()")
3588
3589     def test_delete_hook(self):
3590         # Testing __del__ hook...
3591         log = []
3592         class C(object):
3593             def __del__(self):
3594                 log.append(1)
3595         c = C()
3596         self.assertEqual(log, [])
3597         del c
3598         test_support.gc_collect()
3599         self.assertEqual(log, [1])
3600
3601         class D(object): pass
3602         d = D()
3603         try: del d[0]
3604         except TypeError: pass
3605         else: self.fail("invalid del() didn't raise TypeError")
3606
3607     def test_hash_inheritance(self):
3608         # Testing hash of mutable subclasses...
3609
3610         class mydict(dict):
3611             pass
3612         d = mydict()
3613         try:
3614             hash(d)
3615         except TypeError:
3616             pass
3617         else:
3618             self.fail("hash() of dict subclass should fail")
3619
3620         class mylist(list):
3621             pass
3622         d = mylist()
3623         try:
3624             hash(d)
3625         except TypeError:
3626             pass
3627         else:
3628             self.fail("hash() of list subclass should fail")
3629
3630     def test_str_operations(self):
3631         try: 'a' + 5
3632         except TypeError: pass
3633         else: self.fail("'' + 5 doesn't raise TypeError")
3634
3635         try: ''.split('')
3636         except ValueError: pass
3637         else: self.fail("''.split('') doesn't raise ValueError")
3638
3639         try: ''.join([0])
3640         except TypeError: pass
3641         else: self.fail("''.join([0]) doesn't raise TypeError")
3642
3643         try: ''.rindex('5')
3644         except ValueError: pass
3645         else: self.fail("''.rindex('5') doesn't raise ValueError")
3646
3647         try: '%(n)s' % None
3648         except TypeError: pass
3649         else: self.fail("'%(n)s' % None doesn't raise TypeError")
3650
3651         try: '%(n' % {}
3652         except ValueError: pass
3653         else: self.fail("'%(n' % {} '' doesn't raise ValueError")
3654
3655         try: '%*s' % ('abc')
3656         except TypeError: pass
3657         else: self.fail("'%*s' % ('abc') doesn't raise TypeError")
3658
3659         try: '%*.*s' % ('abc', 5)
3660         except TypeError: pass
3661         else: self.fail("'%*.*s' % ('abc', 5) doesn't raise TypeError")
3662
3663         try: '%s' % (1, 2)
3664         except TypeError: pass
3665         else: self.fail("'%s' % (1, 2) doesn't raise TypeError")
3666
3667         try: '%' % None
3668         except ValueError: pass
3669         else: self.fail("'%' % None doesn't raise ValueError")
3670
3671         self.assertEqual('534253'.isdigit(), 1)
3672         self.assertEqual('534253x'.isdigit(), 0)
3673         self.assertEqual('%c' % 5, '\x05')
3674         self.assertEqual('%c' % '5', '5')
3675
3676     def test_deepcopy_recursive(self):
3677         # Testing deepcopy of recursive objects...
3678         class Node:
3679             pass
3680         a = Node()
3681         b = Node()
3682         a.b = b
3683         b.a = a
3684         z = deepcopy(a) # This blew up before
3685
3686     def test_unintialized_modules(self):
3687         # Testing uninitialized module objects...
3688         from types import ModuleType as M
3689         m = M.__new__(M)
3690         str(m)
3691         self.assertEqual(hasattr(m, "__name__"), 0)
3692         self.assertEqual(hasattr(m, "__file__"), 0)
3693         self.assertEqual(hasattr(m, "foo"), 0)
3694         self.assertFalse(m.__dict__)   # None or {} are both reasonable answers
3695         m.foo = 1
3696         self.assertEqual(m.__dict__, {"foo": 1})
3697
3698     def test_funny_new(self):
3699         # Testing __new__ returning something unexpected...
3700         class C(object):
3701             def __new__(cls, arg):
3702                 if isinstance(arg, str): return [1, 2, 3]
3703                 elif isinstance(arg, int): return object.__new__(D)
3704                 else: return object.__new__(cls)
3705         class D(C):
3706             def __init__(self, arg):
3707                 self.foo = arg
3708         self.assertEqual(C("1"), [1, 2, 3])
3709         self.assertEqual(D("1"), [1, 2, 3])
3710         d = D(None)
3711         self.assertEqual(d.foo, None)
3712         d = C(1)
3713         self.assertEqual(isinstance(d, D), True)
3714         self.assertEqual(d.foo, 1)
3715         d = D(1)
3716         self.assertEqual(isinstance(d, D), True)
3717         self.assertEqual(d.foo, 1)
3718
3719     def test_imul_bug(self):
3720         # Testing for __imul__ problems...
3721         # SF bug 544647
3722         class C(object):
3723             def __imul__(self, other):
3724                 return (self, other)
3725         x = C()
3726         y = x
3727         y *= 1.0
3728         self.assertEqual(y, (x, 1.0))
3729         y = x
3730         y *= 2
3731         self.assertEqual(y, (x, 2))
3732         y = x
3733         y *= 3L
3734         self.assertEqual(y, (x, 3L))
3735         y = x
3736         y *= 1L<<100
3737         self.assertEqual(y, (x, 1L<<100))
3738         y = x
3739         y *= None
3740         self.assertEqual(y, (x, None))
3741         y = x
3742         y *= "foo"
3743         self.assertEqual(y, (x, "foo"))
3744
3745     def test_copy_setstate(self):
3746         # Testing that copy.*copy() correctly uses __setstate__...
3747         import copy
3748         class C(object):
3749             def __init__(self, foo=None):
3750                 self.foo = foo
3751                 self.__foo = foo
3752             def setfoo(self, foo=None):
3753                 self.foo = foo
3754             def getfoo(self):
3755                 return self.__foo
3756             def __getstate__(self):
3757                 return [self.foo]
3758             def __setstate__(self_, lst):
3759                 self.assertEqual(len(lst), 1)
3760                 self_.__foo = self_.foo = lst[0]
3761         a = C(42)
3762         a.setfoo(24)
3763         self.assertEqual(a.foo, 24)
3764         self.assertEqual(a.getfoo(), 42)
3765         b = copy.copy(a)
3766         self.assertEqual(b.foo, 24)
3767         self.assertEqual(b.getfoo(), 24)
3768         b = copy.deepcopy(a)
3769         self.assertEqual(b.foo, 24)
3770         self.assertEqual(b.getfoo(), 24)
3771
3772     def test_slices(self):
3773         # Testing cases with slices and overridden __getitem__ ...
3774
3775         # Strings
3776         self.assertEqual("hello"[:4], "hell")
3777         self.assertEqual("hello"[slice(4)], "hell")
3778         self.assertEqual(str.__getitem__("hello", slice(4)), "hell")
3779         class S(str):
3780             def __getitem__(self, x):
3781                 return str.__getitem__(self, x)
3782         self.assertEqual(S("hello")[:4], "hell")
3783         self.assertEqual(S("hello")[slice(4)], "hell")
3784         self.assertEqual(S("hello").__getitem__(slice(4)), "hell")
3785         # Tuples
3786         self.assertEqual((1,2,3)[:2], (1,2))
3787         self.assertEqual((1,2,3)[slice(2)], (1,2))
3788         self.assertEqual(tuple.__getitem__((1,2,3), slice(2)), (1,2))
3789         class T(tuple):
3790             def __getitem__(self, x):
3791                 return tuple.__getitem__(self, x)
3792         self.assertEqual(T((1,2,3))[:2], (1,2))
3793         self.assertEqual(T((1,2,3))[slice(2)], (1,2))
3794         self.assertEqual(T((1,2,3)).__getitem__(slice(2)), (1,2))
3795         # Lists
3796         self.assertEqual([1,2,3][:2], [1,2])
3797         self.assertEqual([1,2,3][slice(2)], [1,2])
3798         self.assertEqual(list.__getitem__([1,2,3], slice(2)), [1,2])
3799         class L(list):
3800             def __getitem__(self, x):
3801                 return list.__getitem__(self, x)
3802         self.assertEqual(L([1,2,3])[:2], [1,2])
3803         self.assertEqual(L([1,2,3])[slice(2)], [1,2])
3804         self.assertEqual(L([1,2,3]).__getitem__(slice(2)), [1,2])
3805         # Now do lists and __setitem__
3806         a = L([1,2,3])
3807         a[slice(1, 3)] = [3,2]
3808         self.assertEqual(a, [1,3,2])
3809         a[slice(0, 2, 1)] = [3,1]
3810         self.assertEqual(a, [3,1,2])
3811         a.__setitem__(slice(1, 3), [2,1])
3812         self.assertEqual(a, [3,2,1])
3813         a.__setitem__(slice(0, 2, 1), [2,3])
3814         self.assertEqual(a, [2,3,1])
3815
3816     def test_subtype_resurrection(self):
3817         # Testing resurrection of new-style instance...
3818
3819         class C(object):
3820             container = []
3821
3822             def __del__(self):
3823                 # resurrect the instance
3824                 C.container.append(self)
3825
3826         c = C()
3827         c.attr = 42
3828
3829         # The most interesting thing here is whether this blows up, due to
3830         # flawed GC tracking logic in typeobject.c's call_finalizer() (a 2.2.1
3831         # bug).
3832         del c
3833
3834         # If that didn't blow up, it's also interesting to see whether clearing
3835         # the last container slot works: that will attempt to delete c again,
3836         # which will cause c to get appended back to the container again
3837         # "during" the del.  (On non-CPython implementations, however, __del__
3838         # is typically not called again.)
3839         test_support.gc_collect()
3840         self.assertEqual(len(C.container), 1)
3841         del C.container[-1]
3842         if test_support.check_impl_detail():
3843             test_support.gc_collect()
3844             self.assertEqual(len(C.container), 1)
3845             self.assertEqual(C.container[-1].attr, 42)
3846
3847         # Make c mortal again, so that the test framework with -l doesn't report
3848         # it as a leak.
3849         del C.__del__
3850
3851     def test_slots_trash(self):
3852         # Testing slot trash...
3853         # Deallocating deeply nested slotted trash caused stack overflows
3854         class trash(object):
3855             __slots__ = ['x']
3856             def __init__(self, x):
3857                 self.x = x
3858         o = None
3859         for i in xrange(50000):
3860             o = trash(o)
3861         del o
3862
3863     def test_slots_multiple_inheritance(self):
3864         # SF bug 575229, multiple inheritance w/ slots dumps core
3865         class A(object):
3866             __slots__=()
3867         class B(object):
3868             pass
3869         class C(A,B) :
3870             __slots__=()
3871         if test_support.check_impl_detail():
3872             self.assertEqual(C.__basicsize__, B.__basicsize__)
3873         self.assertTrue(hasattr(C, '__dict__'))
3874         self.assertTrue(hasattr(C, '__weakref__'))
3875         C().x = 2
3876
3877     def test_rmul(self):
3878         # Testing correct invocation of __rmul__...
3879         # SF patch 592646
3880         class C(object):
3881             def __mul__(self, other):
3882                 return "mul"
3883             def __rmul__(self, other):
3884                 return "rmul"
3885         a = C()
3886         self.assertEqual(a*2, "mul")
3887         self.assertEqual(a*2.2, "mul")
3888         self.assertEqual(2*a, "rmul")
3889         self.assertEqual(2.2*a, "rmul")
3890
3891     def test_ipow(self):
3892         # Testing correct invocation of __ipow__...
3893         # [SF bug 620179]
3894         class C(object):
3895             def __ipow__(self, other):
3896                 pass
3897         a = C()
3898         a **= 2
3899
3900     def test_mutable_bases(self):
3901         # Testing mutable bases...
3902
3903         # stuff that should work:
3904         class C(object):
3905             pass
3906         class C2(object):
3907             def __getattribute__(self, attr):
3908                 if attr == 'a':
3909                     return 2
3910                 else:
3911                     return super(C2, self).__getattribute__(attr)
3912             def meth(self):
3913                 return 1
3914         class D(C):
3915             pass
3916         class E(D):
3917             pass
3918         d = D()
3919         e = E()
3920         D.__bases__ = (C,)
3921         D.__bases__ = (C2,)
3922         self.assertEqual(d.meth(), 1)
3923         self.assertEqual(e.meth(), 1)
3924         self.assertEqual(d.a, 2)
3925         self.assertEqual(e.a, 2)
3926         self.assertEqual(C2.__subclasses__(), [D])
3927
3928         try:
3929             del D.__bases__
3930         except (TypeError, AttributeError):
3931             pass
3932         else:
3933             self.fail("shouldn't be able to delete .__bases__")
3934
3935         try:
3936             D.__bases__ = ()
3937         except TypeError, msg:
3938             if str(msg) == "a new-style class can't have only classic bases":
3939                 self.fail("wrong error message for .__bases__ = ()")
3940         else:
3941             self.fail("shouldn't be able to set .__bases__ to ()")
3942
3943         try:
3944             D.__bases__ = (D,)
3945         except TypeError:
3946             pass
3947         else:
3948             # actually, we'll have crashed by here...
3949             self.fail("shouldn't be able to create inheritance cycles")
3950
3951         try:
3952             D.__bases__ = (C, C)
3953         except TypeError:
3954             pass
3955         else:
3956             self.fail("didn't detect repeated base classes")
3957
3958         try:
3959             D.__bases__ = (E,)
3960         except TypeError:
3961             pass
3962         else:
3963             self.fail("shouldn't be able to create inheritance cycles")
3964
3965         # let's throw a classic class into the mix:
3966         class Classic:
3967             def meth2(self):
3968                 return 3
3969
3970         D.__bases__ = (C, Classic)
3971
3972         self.assertEqual(d.meth2(), 3)
3973         self.assertEqual(e.meth2(), 3)
3974         try:
3975             d.a
3976         except AttributeError:
3977             pass
3978         else:
3979             self.fail("attribute should have vanished")
3980
3981         try:
3982             D.__bases__ = (Classic,)
3983         except TypeError:
3984             pass
3985         else:
3986             self.fail("new-style class must have a new-style base")
3987
3988     def test_builtin_bases(self):
3989         # Make sure all the builtin types can have their base queried without
3990         # segfaulting. See issue #5787.
3991         builtin_types = [tp for tp in __builtin__.__dict__.itervalues()
3992                          if isinstance(tp, type)]
3993         for tp in builtin_types:
3994             object.__getattribute__(tp, "__bases__")
3995             if tp is not object:
3996                 self.assertEqual(len(tp.__bases__), 1, tp)
3997
3998         class L(list):
3999             pass
4000
4001         class C(object):
4002             pass
4003
4004         class D(C):
4005             pass
4006
4007         try:
4008             L.__bases__ = (dict,)
4009         except TypeError:
4010             pass
4011         else:
4012             self.fail("shouldn't turn list subclass into dict subclass")
4013
4014         try:
4015             list.__bases__ = (dict,)
4016         except TypeError:
4017             pass
4018         else:
4019             self.fail("shouldn't be able to assign to list.__bases__")
4020
4021         try:
4022             D.__bases__ = (C, list)
4023         except TypeError:
4024             pass
4025         else:
4026             assert 0, "best_base calculation found wanting"
4027
4028
4029     def test_mutable_bases_with_failing_mro(self):
4030         # Testing mutable bases with failing mro...
4031         class WorkOnce(type):
4032             def __new__(self, name, bases, ns):
4033                 self.flag = 0
4034                 return super(WorkOnce, self).__new__(WorkOnce, name, bases, ns)
4035             def mro(self):
4036                 if self.flag > 0:
4037                     raise RuntimeError, "bozo"
4038                 else:
4039                     self.flag += 1
4040                     return type.mro(self)
4041
4042         class WorkAlways(type):
4043             def mro(self):
4044                 # this is here to make sure that .mro()s aren't called
4045                 # with an exception set (which was possible at one point).
4046                 # An error message will be printed in a debug build.
4047                 # What's a good way to test for this?
4048                 return type.mro(self)
4049
4050         class C(object):
4051             pass
4052
4053         class C2(object):
4054             pass
4055
4056         class D(C):
4057             pass
4058
4059         class E(D):
4060             pass
4061
4062         class F(D):
4063             __metaclass__ = WorkOnce
4064
4065         class G(D):
4066             __metaclass__ = WorkAlways
4067
4068         # Immediate subclasses have their mro's adjusted in alphabetical
4069         # order, so E's will get adjusted before adjusting F's fails.  We
4070         # check here that E's gets restored.
4071
4072         E_mro_before = E.__mro__
4073         D_mro_before = D.__mro__
4074
4075         try:
4076             D.__bases__ = (C2,)
4077         except RuntimeError:
4078             self.assertEqual(E.__mro__, E_mro_before)
4079             self.assertEqual(D.__mro__, D_mro_before)
4080         else:
4081             self.fail("exception not propagated")
4082
4083     def test_mutable_bases_catch_mro_conflict(self):
4084         # Testing mutable bases catch mro conflict...
4085         class A(object):
4086             pass
4087
4088         class B(object):
4089             pass
4090
4091         class C(A, B):
4092             pass
4093
4094         class D(A, B):
4095             pass
4096
4097         class E(C, D):
4098             pass
4099
4100         try:
4101             C.__bases__ = (B, A)
4102         except TypeError:
4103             pass
4104         else:
4105             self.fail("didn't catch MRO conflict")
4106
4107     def test_mutable_names(self):
4108         # Testing mutable names...
4109         class C(object):
4110             pass
4111
4112         # C.__module__ could be 'test_descr' or '__main__'
4113         mod = C.__module__
4114
4115         C.__name__ = 'D'
4116         self.assertEqual((C.__module__, C.__name__), (mod, 'D'))
4117
4118         C.__name__ = 'D.E'
4119         self.assertEqual((C.__module__, C.__name__), (mod, 'D.E'))
4120
4121     def test_subclass_right_op(self):
4122         # Testing correct dispatch of subclass overloading __r<op>__...
4123
4124         # This code tests various cases where right-dispatch of a subclass
4125         # should be preferred over left-dispatch of a base class.
4126
4127         # Case 1: subclass of int; this tests code in abstract.c::binary_op1()
4128
4129         class B(int):
4130             def __floordiv__(self, other):
4131                 return "B.__floordiv__"
4132             def __rfloordiv__(self, other):
4133                 return "B.__rfloordiv__"
4134
4135         self.assertEqual(B(1) // 1, "B.__floordiv__")
4136         self.assertEqual(1 // B(1), "B.__rfloordiv__")
4137
4138         # Case 2: subclass of object; this is just the baseline for case 3
4139
4140         class C(object):
4141             def __floordiv__(self, other):
4142                 return "C.__floordiv__"
4143             def __rfloordiv__(self, other):
4144                 return "C.__rfloordiv__"
4145
4146         self.assertEqual(C() // 1, "C.__floordiv__")
4147         self.assertEqual(1 // C(), "C.__rfloordiv__")
4148
4149         # Case 3: subclass of new-style class; here it gets interesting
4150
4151         class D(C):
4152             def __floordiv__(self, other):
4153                 return "D.__floordiv__"
4154             def __rfloordiv__(self, other):
4155                 return "D.__rfloordiv__"
4156
4157         self.assertEqual(D() // C(), "D.__floordiv__")
4158         self.assertEqual(C() // D(), "D.__rfloordiv__")
4159
4160         # Case 4: this didn't work right in 2.2.2 and 2.3a1
4161
4162         class E(C):
4163             pass
4164
4165         self.assertEqual(E.__rfloordiv__, C.__rfloordiv__)
4166
4167         self.assertEqual(E() // 1, "C.__floordiv__")
4168         self.assertEqual(1 // E(), "C.__rfloordiv__")
4169         self.assertEqual(E() // C(), "C.__floordiv__")
4170         self.assertEqual(C() // E(), "C.__floordiv__") # This one would fail
4171
4172     @test_support.impl_detail("testing an internal kind of method object")
4173     def test_meth_class_get(self):
4174         # Testing __get__ method of METH_CLASS C methods...
4175         # Full coverage of descrobject.c::classmethod_get()
4176
4177         # Baseline
4178         arg = [1, 2, 3]
4179         res = {1: None, 2: None, 3: None}
4180         self.assertEqual(dict.fromkeys(arg), res)
4181         self.assertEqual({}.fromkeys(arg), res)
4182
4183         # Now get the descriptor
4184         descr = dict.__dict__["fromkeys"]
4185
4186         # More baseline using the descriptor directly
4187         self.assertEqual(descr.__get__(None, dict)(arg), res)
4188         self.assertEqual(descr.__get__({})(arg), res)
4189
4190         # Now check various error cases
4191         try:
4192             descr.__get__(None, None)
4193         except TypeError:
4194             pass
4195         else:
4196             self.fail("shouldn't have allowed descr.__get__(None, None)")
4197         try:
4198             descr.__get__(42)
4199         except TypeError:
4200             pass
4201         else:
4202             self.fail("shouldn't have allowed descr.__get__(42)")
4203         try:
4204             descr.__get__(None, 42)
4205         except TypeError:
4206             pass
4207         else:
4208             self.fail("shouldn't have allowed descr.__get__(None, 42)")
4209         try:
4210             descr.__get__(None, int)
4211         except TypeError:
4212             pass
4213         else:
4214             self.fail("shouldn't have allowed descr.__get__(None, int)")
4215
4216     def test_isinst_isclass(self):
4217         # Testing proxy isinstance() and isclass()...
4218         class Proxy(object):
4219             def __init__(self, obj):
4220                 self.__obj = obj
4221             def __getattribute__(self, name):
4222                 if name.startswith("_Proxy__"):
4223                     return object.__getattribute__(self, name)
4224                 else:
4225                     return getattr(self.__obj, name)
4226         # Test with a classic class
4227         class C:
4228             pass
4229         a = C()
4230         pa = Proxy(a)
4231         self.assertIsInstance(a, C)  # Baseline
4232         self.assertIsInstance(pa, C) # Test
4233         # Test with a classic subclass
4234         class D(C):
4235             pass
4236         a = D()
4237         pa = Proxy(a)
4238         self.assertIsInstance(a, C)  # Baseline
4239         self.assertIsInstance(pa, C) # Test
4240         # Test with a new-style class
4241         class C(object):
4242             pass
4243         a = C()
4244         pa = Proxy(a)
4245         self.assertIsInstance(a, C)  # Baseline
4246         self.assertIsInstance(pa, C) # Test
4247         # Test with a new-style subclass
4248         class D(C):
4249             pass
4250         a = D()
4251         pa = Proxy(a)
4252         self.assertIsInstance(a, C)  # Baseline
4253         self.assertIsInstance(pa, C) # Test
4254
4255     def test_proxy_super(self):
4256         # Testing super() for a proxy object...
4257         class Proxy(object):
4258             def __init__(self, obj):
4259                 self.__obj = obj
4260             def __getattribute__(self, name):
4261                 if name.startswith("_Proxy__"):
4262                     return object.__getattribute__(self, name)
4263                 else:
4264                     return getattr(self.__obj, name)
4265
4266         class B(object):
4267             def f(self):
4268                 return "B.f"
4269
4270         class C(B):
4271             def f(self):
4272                 return super(C, self).f() + "->C.f"
4273
4274         obj = C()
4275         p = Proxy(obj)
4276         self.assertEqual(C.__dict__["f"](p), "B.f->C.f")
4277
4278     def test_carloverre(self):
4279         # Testing prohibition of Carlo Verre's hack...
4280         try:
4281             object.__setattr__(str, "foo", 42)
4282         except TypeError:
4283             pass
4284         else:
4285             self.fail("Carlo Verre __setattr__ suceeded!")
4286         try:
4287             object.__delattr__(str, "lower")
4288         except TypeError:
4289             pass
4290         else:
4291             self.fail("Carlo Verre __delattr__ succeeded!")
4292
4293     def test_weakref_segfault(self):
4294         # Testing weakref segfault...
4295         # SF 742911
4296         import weakref
4297
4298         class Provoker:
4299             def __init__(self, referrent):
4300                 self.ref = weakref.ref(referrent)
4301
4302             def __del__(self):
4303                 x = self.ref()
4304
4305         class Oops(object):
4306             pass
4307
4308         o = Oops()
4309         o.whatever = Provoker(o)
4310         del o
4311
4312     def test_wrapper_segfault(self):
4313         # SF 927248: deeply nested wrappers could cause stack overflow
4314         f = lambda:None
4315         for i in xrange(1000000):
4316             f = f.__call__
4317         f = None
4318
4319     def test_file_fault(self):
4320         # Testing sys.stdout is changed in getattr...
4321         test_stdout = sys.stdout
4322         class StdoutGuard:
4323             def __getattr__(self, attr):
4324                 sys.stdout = sys.__stdout__
4325                 raise RuntimeError("Premature access to sys.stdout.%s" % attr)
4326         sys.stdout = StdoutGuard()
4327         try:
4328             print "Oops!"
4329         except RuntimeError:
4330             pass
4331         finally:
4332             sys.stdout = test_stdout
4333
4334     def test_vicious_descriptor_nonsense(self):
4335         # Testing vicious_descriptor_nonsense...
4336
4337         # A potential segfault spotted by Thomas Wouters in mail to
4338         # python-dev 2003-04-17, turned into an example & fixed by Michael
4339         # Hudson just less than four months later...
4340
4341         class Evil(object):
4342             def __hash__(self):
4343                 return hash('attr')
4344             def __eq__(self, other):
4345                 del C.attr
4346                 return 0
4347
4348         class Descr(object):
4349             def __get__(self, ob, type=None):
4350                 return 1
4351
4352         class C(object):
4353             attr = Descr()
4354
4355         c = C()
4356         c.__dict__[Evil()] = 0
4357
4358         self.assertEqual(c.attr, 1)
4359         # this makes a crash more likely:
4360         test_support.gc_collect()
4361         self.assertEqual(hasattr(c, 'attr'), False)
4362
4363     def test_init(self):
4364         # SF 1155938
4365         class Foo(object):
4366             def __init__(self):
4367                 return 10
4368         try:
4369             Foo()
4370         except TypeError:
4371             pass
4372         else:
4373             self.fail("did not test __init__() for None return")
4374
4375     def test_method_wrapper(self):
4376         # Testing method-wrapper objects...
4377         # <type 'method-wrapper'> did not support any reflection before 2.5
4378
4379         l = []
4380         self.assertEqual(l.__add__, l.__add__)
4381         self.assertEqual(l.__add__, [].__add__)
4382         self.assertTrue(l.__add__ != [5].__add__)
4383         self.assertTrue(l.__add__ != l.__mul__)
4384         self.assertTrue(l.__add__.__name__ == '__add__')
4385         if hasattr(l.__add__, '__self__'):
4386             # CPython
4387             self.assertTrue(l.__add__.__self__ is l)
4388             self.assertTrue(l.__add__.__objclass__ is list)
4389         else:
4390             # Python implementations where [].__add__ is a normal bound method
4391             self.assertTrue(l.__add__.im_self is l)
4392             self.assertTrue(l.__add__.im_class is list)
4393         self.assertEqual(l.__add__.__doc__, list.__add__.__doc__)
4394         try:
4395             hash(l.__add__)
4396         except TypeError:
4397             pass
4398         else:
4399             self.fail("no TypeError from hash([].__add__)")
4400
4401         t = ()
4402         t += (7,)
4403         self.assertEqual(t.__add__, (7,).__add__)
4404         self.assertEqual(hash(t.__add__), hash((7,).__add__))
4405
4406     def test_not_implemented(self):
4407         # Testing NotImplemented...
4408         # all binary methods should be able to return a NotImplemented
4409         import operator
4410
4411         def specialmethod(self, other):
4412             return NotImplemented
4413
4414         def check(expr, x, y):
4415             try:
4416                 exec expr in {'x': x, 'y': y, 'operator': operator}
4417             except TypeError:
4418                 pass
4419             else:
4420                 self.fail("no TypeError from %r" % (expr,))
4421
4422         N1 = sys.maxint + 1L    # might trigger OverflowErrors instead of
4423                                 # TypeErrors
4424         N2 = sys.maxint         # if sizeof(int) < sizeof(long), might trigger
4425                                 #   ValueErrors instead of TypeErrors
4426         for metaclass in [type, types.ClassType]:
4427             for name, expr, iexpr in [
4428                     ('__add__',      'x + y',                   'x += y'),
4429                     ('__sub__',      'x - y',                   'x -= y'),
4430                     ('__mul__',      'x * y',                   'x *= y'),
4431                     ('__truediv__',  'operator.truediv(x, y)',  None),
4432                     ('__floordiv__', 'operator.floordiv(x, y)', None),
4433                     ('__div__',      'x / y',                   'x /= y'),
4434                     ('__mod__',      'x % y',                   'x %= y'),
4435                     ('__divmod__',   'divmod(x, y)',            None),
4436                     ('__pow__',      'x ** y',                  'x **= y'),
4437                     ('__lshift__',   'x << y',                  'x <<= y'),
4438                     ('__rshift__',   'x >> y',                  'x >>= y'),
4439                     ('__and__',      'x & y',                   'x &= y'),
4440                     ('__or__',       'x | y',                   'x |= y'),
4441                     ('__xor__',      'x ^ y',                   'x ^= y'),
4442                     ('__coerce__',   'coerce(x, y)',            None)]:
4443                 if name == '__coerce__':
4444                     rname = name
4445                 else:
4446                     rname = '__r' + name[2:]
4447                 A = metaclass('A', (), {name: specialmethod})
4448                 B = metaclass('B', (), {rname: specialmethod})
4449                 a = A()
4450                 b = B()
4451                 check(expr, a, a)
4452                 check(expr, a, b)
4453                 check(expr, b, a)
4454                 check(expr, b, b)
4455                 check(expr, a, N1)
4456                 check(expr, a, N2)
4457                 check(expr, N1, b)
4458                 check(expr, N2, b)
4459                 if iexpr:
4460                     check(iexpr, a, a)
4461                     check(iexpr, a, b)
4462                     check(iexpr, b, a)
4463                     check(iexpr, b, b)
4464                     check(iexpr, a, N1)
4465                     check(iexpr, a, N2)
4466                     iname = '__i' + name[2:]
4467                     C = metaclass('C', (), {iname: specialmethod})
4468                     c = C()
4469                     check(iexpr, c, a)
4470                     check(iexpr, c, b)
4471                     check(iexpr, c, N1)
4472                     check(iexpr, c, N2)
4473
4474     def test_assign_slice(self):
4475         # ceval.c's assign_slice used to check for
4476         # tp->tp_as_sequence->sq_slice instead of
4477         # tp->tp_as_sequence->sq_ass_slice
4478
4479         class C(object):
4480             def __setslice__(self, start, stop, value):
4481                 self.value = value
4482
4483         c = C()
4484         c[1:2] = 3
4485         self.assertEqual(c.value, 3)
4486
4487     def test_set_and_no_get(self):
4488         # See
4489         # http://mail.python.org/pipermail/python-dev/2010-January/095637.html
4490         class Descr(object):
4491
4492             def __init__(self, name):
4493                 self.name = name
4494
4495             def __set__(self, obj, value):
4496                 obj.__dict__[self.name] = value
4497         descr = Descr("a")
4498
4499         class X(object):
4500             a = descr
4501
4502         x = X()
4503         self.assertIs(x.a, descr)
4504         x.a = 42
4505         self.assertEqual(x.a, 42)
4506
4507         # Also check type_getattro for correctness.
4508         class Meta(type):
4509             pass
4510         class X(object):
4511             __metaclass__ = Meta
4512         X.a = 42
4513         Meta.a = Descr("a")
4514         self.assertEqual(X.a, 42)
4515
4516     def test_getattr_hooks(self):
4517         # issue 4230
4518
4519         class Descriptor(object):
4520             counter = 0
4521             def __get__(self, obj, objtype=None):
4522                 def getter(name):
4523                     self.counter += 1
4524                     raise AttributeError(name)
4525                 return getter
4526
4527         descr = Descriptor()
4528         class A(object):
4529             __getattribute__ = descr
4530         class B(object):
4531             __getattr__ = descr
4532         class C(object):
4533             __getattribute__ = descr
4534             __getattr__ = descr
4535
4536         self.assertRaises(AttributeError, getattr, A(), "attr")
4537         self.assertEqual(descr.counter, 1)
4538         self.assertRaises(AttributeError, getattr, B(), "attr")
4539         self.assertEqual(descr.counter, 2)
4540         self.assertRaises(AttributeError, getattr, C(), "attr")
4541         self.assertEqual(descr.counter, 4)
4542
4543         import gc
4544         class EvilGetattribute(object):
4545             # This used to segfault
4546             def __getattr__(self, name):
4547                 raise AttributeError(name)
4548             def __getattribute__(self, name):
4549                 del EvilGetattribute.__getattr__
4550                 for i in range(5):
4551                     gc.collect()
4552                 raise AttributeError(name)
4553
4554         self.assertRaises(AttributeError, getattr, EvilGetattribute(), "attr")
4555
4556
4557 class DictProxyTests(unittest.TestCase):
4558     def setUp(self):
4559         class C(object):
4560             def meth(self):
4561                 pass
4562         self.C = C
4563
4564     def test_iter_keys(self):
4565         # Testing dict-proxy iterkeys...
4566         keys = [ key for key in self.C.__dict__.iterkeys() ]
4567         keys.sort()
4568         self.assertEqual(keys, ['__dict__', '__doc__', '__module__',
4569             '__weakref__', 'meth'])
4570
4571     def test_iter_values(self):
4572         # Testing dict-proxy itervalues...
4573         values = [ values for values in self.C.__dict__.itervalues() ]
4574         self.assertEqual(len(values), 5)
4575
4576     def test_iter_items(self):
4577         # Testing dict-proxy iteritems...
4578         keys = [ key for (key, value) in self.C.__dict__.iteritems() ]
4579         keys.sort()
4580         self.assertEqual(keys, ['__dict__', '__doc__', '__module__',
4581             '__weakref__', 'meth'])
4582
4583     def test_dict_type_with_metaclass(self):
4584         # Testing type of __dict__ when __metaclass__ set...
4585         class B(object):
4586             pass
4587         class M(type):
4588             pass
4589         class C:
4590             # In 2.3a1, C.__dict__ was a real dict rather than a dict proxy
4591             __metaclass__ = M
4592         self.assertEqual(type(C.__dict__), type(B.__dict__))
4593
4594
4595 class PTypesLongInitTest(unittest.TestCase):
4596     # This is in its own TestCase so that it can be run before any other tests.
4597     def test_pytype_long_ready(self):
4598         # Testing SF bug 551412 ...
4599
4600         # This dumps core when SF bug 551412 isn't fixed --
4601         # but only when test_descr.py is run separately.
4602         # (That can't be helped -- as soon as PyType_Ready()
4603         # is called for PyLong_Type, the bug is gone.)
4604         class UserLong(object):
4605             def __pow__(self, *args):
4606                 pass
4607         try:
4608             pow(0L, UserLong(), 0L)
4609         except:
4610             pass
4611
4612         # Another segfault only when run early
4613         # (before PyType_Ready(tuple) is called)
4614         type.mro(tuple)
4615
4616
4617 def test_main():
4618     deprecations = [(r'complex divmod\(\), // and % are deprecated$',
4619                      DeprecationWarning)]
4620     if sys.py3kwarning:
4621         deprecations += [
4622             ("classic (int|long) division", DeprecationWarning),
4623             ("coerce.. not supported", DeprecationWarning),
4624             (".+__(get|set|del)slice__ has been removed", DeprecationWarning)]
4625     with test_support.check_warnings(*deprecations):
4626         # Run all local test cases, with PTypesLongInitTest first.
4627         test_support.run_unittest(PTypesLongInitTest, OperatorsTest,
4628                                   ClassPropertiesAndMethods, DictProxyTests)
4629
4630 if __name__ == "__main__":
4631     test_main()