third_party/WebKit/LayoutTests/fast/js/script-tests/method-check.js

   1 description(
   2 "Test method-check related bugs"
   3 );
   4
   5 function func2() { }
   6
   7 // This test yields PASS, if malloc does not reuse the memory address for the structure of String prototype
   8 function func()
   9 {
  10     String.prototype.a = function() { }
  11     String.prototype.b = function() { }
  12
  13     if (window.GCController)
  14         GCController.collect();
  15     else {
  16         // The following 3 lines cause gc() flush on a Debian
  17         // Linux machine, but there is no garantee, it works on
  18         // any other computer. (Not even another Debian Linux)
  19         // If func2() is not called or a much bigger or lower
  20         // value than 5000 is chosen, the crash won't happen
  21         func2()
  22         for (var i = 0; i < 5000; ++i)
  23             new Boolean()
  24     }
  25
  26     var str = ""
  27     for (var i = 0; i < 5; ++i)
  28         str.a()
  29 }
  30
  31 func()
  32 func()
  33
  34 // Test that method caching correctly invalidates (doesn't incorrectly continue to call a previously cached function).
  35 var total = 0;
  36 function addOne()
  37 {
  38     ++total;
  39 }
  40 function addOneHundred()
  41 {
  42     total+=100;
  43 }
  44 var totalizer = {
  45     makeCall: function(callback)
  46     {
  47         this.callback = callback;
  48         this.callback();
  49     }
  50 };
  51 for (var i=0; i<100; ++i)
  52     totalizer.makeCall(addOne);
  53 totalizer.makeCall(addOneHundred);
  54 shouldBe('total', '200');
  55
  56 // Check that we don't assert when method_check is applied to a non-JSFunction
  57 for (var i = 0; i < 10000; i++)
  58     Array.constructor(1);