src/v8/test/mjsunit/contextual-calls.js

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  27
  28 var realms = [Realm.current(), Realm.create()];
  29 globals = [Realm.global(0), Realm.global(1)];
  30 Realm.shared = {}
  31
  32 function install(name, value) {
  33   Realm.shared[name] = value;
  34   for (i in realms) {
  35     Realm.eval(realms[i], name + " = Realm.shared['" + name + "'];");
  36   }
  37 }
  38
  39 install('return_this', function() { return this; });
  40 install('return_this_strict', function () { 'use strict'; return this; });
  41
  42 // test behaviour of 'with' scope
  43 for (i in realms) {
  44   Realm.shared.results = [];
  45   // in the second case, 'this' is found in the with scope,
  46   // so the receiver is 'this'
  47   Realm.eval(realms[i],"                                                       \
  48       with('irrelevant') {                                                     \
  49         Realm.shared.results.push(return_this());                              \
  50         Realm.shared.results.push(return_this_strict());                       \
  51       }                                                                        \
  52       with(this) {                                                             \
  53         Realm.shared.results.push(return_this());                              \
  54         Realm.shared.results.push(return_this_strict());                       \
  55       }                                                                        \
  56     ");
  57   assertSame(globals[0], Realm.shared.results[0]);
  58   assertSame(undefined, Realm.shared.results[1]);
  59   assertSame(globals[i], Realm.shared.results[2]);
  60   assertSame(globals[i], Realm.shared.results[3]);
  61 }
  62
  63 // test 'apply' and 'call'
  64 for (i in realms) {
  65   // 'apply' without a receiver is a contextual call
  66   assertSame(globals[0], Realm.eval(realms[i],'return_this.apply()')) ;
  67   assertSame(undefined, Realm.eval(realms[i],'return_this_strict.apply()'));
  68   assertSame(globals[0], Realm.eval(realms[i],'return_this.apply(null)')) ;
  69   assertSame(null, Realm.eval(realms[i],'return_this_strict.apply(null)'));
  70   // 'call' without a receiver is a contextual call
  71   assertSame(globals[0], Realm.eval(realms[i],'return_this.call()')) ;
  72   assertSame(undefined, Realm.eval(realms[i],'return_this_strict.call()'));
  73   assertSame(globals[0], Realm.eval(realms[i],'return_this.call(null)')) ;
  74   assertSame(null, Realm.eval(realms[i],'return_this_strict.call(null)'));
  75 }
  76
  77 // test ics
  78 for (var i = 0; i < 4; i++) {
  79   assertSame(globals[0], return_this());
  80   assertSame(undefined, return_this_strict());
  81 }
  82
  83 // BUG(1547)
  84
  85 Realm.eval(realms[0], "var name = 'o'");
  86 Realm.eval(realms[1], "var name = 'i'");
  87
  88 install('f', function() { return this.name; });
  89 install('g', function() { "use strict"; return this ? this.name : "u"; });
  90
  91 for (i in realms) {
  92   result = Realm.eval(realms[i], "                                             \
  93       (function(){return f();})() +                                            \
  94       (function(){return (1,f)();})() +                                        \
  95       (function(){'use strict'; return f();})() +                              \
  96       (function(){'use strict'; return (1,f)();})() +                          \
  97       (function(){return g();})() +                                            \
  98       (function(){return (1,g)();})() +                                        \
  99       (function(){'use strict'; return g();})() +                              \
 100       (function(){'use strict'; return (1,g)();})();                           \
 101     ");
 102   assertSame("oooouuuu", result);
 103 }