1 // Copyright 2011 the V8 project authors. All rights reserved.
2 // Redistribution and use in source and binary forms, with or without
3 // modification, are permitted provided that the following conditions are
6 // * Redistributions of source code must retain the above copyright
7 // notice, this list of conditions and the following disclaimer.
8 // * Redistributions in binary form must reproduce the above
9 // copyright notice, this list of conditions and the following
10 // disclaimer in the documentation and/or other materials provided
11 // with the distribution.
12 // * Neither the name of Google Inc. nor the names of its
13 // contributors may be used to endorse or promote products derived
14 // from this software without specific prior written permission.
16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 // Flags: --allow-natives-syntax
30 // Check that message and name are not enumerable on Error objects.
31 var desc = Object.getOwnPropertyDescriptor(Error.prototype, 'name');
32 assertFalse(desc['enumerable']);
33 desc = Object.getOwnPropertyDescriptor(Error.prototype, 'message');
34 assertFalse(desc['enumerable']);
36 var e = new Error("foobar");
37 desc = Object.getOwnPropertyDescriptor(e, 'message');
38 assertFalse(desc['enumerable']);
39 desc = Object.getOwnPropertyDescriptor(e, 'stack');
40 assertFalse(desc['enumerable']);
43 assertFalse(e.hasOwnProperty('message'));
45 // name is not tested above, but in addition we should have no enumerable
46 // properties, so we simply assert that.
51 // Check that error construction does not call setters for the
52 // properties on error objects in prototypes.
53 function fail() { assertUnreachable(); };
54 ReferenceError.prototype.__defineSetter__('name', fail);
55 ReferenceError.prototype.__defineSetter__('message', fail);
56 ReferenceError.prototype.__defineSetter__('stack', fail);
58 var e = new ReferenceError();
59 assertTrue(e.hasOwnProperty('stack'));
61 var e = new ReferenceError('123');
62 assertTrue(e.hasOwnProperty('message'));
63 assertTrue(e.hasOwnProperty('stack'));
65 var e = %MakeReferenceError("my_test_error", [0, 1]);
66 assertTrue(e.hasOwnProperty('stack'));
68 // Check that intercepting property access from toString is prevented for
69 // compiler errors. This is not specified, but allowing interception
70 // through a getter can leak error objects from different
71 // script tags in the same context in a browser setting.
72 var errors = [SyntaxError, ReferenceError, TypeError];
73 for (var i in errors) {
74 var name = errors[i].prototype.toString();
75 // Monkey-patch prototype.
76 var props = ["name", "message", "stack"];
77 for (var j in props) {
78 errors[i].prototype.__defineGetter__(props[j], fail);
80 // String conversion should not invoke monkey-patched getters on prototype.
81 var e = new errors[i];
82 assertEquals(name, e.toString());
83 // Custom getters in actual objects are welcome.
84 e.__defineGetter__("name", function() { return "mine"; });
85 assertEquals("mine", e.toString());
88 // Monkey-patching non-static errors should still be observable.
90 MyError.prototype = new Error;
91 var errors = [Error, RangeError, EvalError, URIError, MyError];
92 for (var i in errors) {
93 errors[i].prototype.__defineGetter__("name", function() { return "my"; });
94 errors[i].prototype.__defineGetter__("message", function() { return "moo"; });
95 var e = new errors[i];
96 assertEquals("my: moo", e.toString());
100 Error.prototype.toString = Object.prototype.toString;
101 assertEquals("[object Error]", Error.prototype.toString());
102 assertEquals(Object.prototype, Error.prototype.__proto__);
103 var e = new Error("foo");
104 assertEquals("[object Error]", e.toString());