tests/stress/instanceof.js

   1 function foo(o, prototype) {
   2     return o instanceof prototype;
   3 }
   4
   5 noInline(foo);
   6
   7 function test(o, prototype, expected) {
   8     var actual = foo(o, prototype);
   9     if (actual != expected)
  10         throw new Error("bad result: " + actual);
  11 }
  12
  13 function Foo() { }
  14
  15 function Bar() { }
  16 Bar.prototype = new Foo();
  17
  18 for (var i = 0; i < 10000; ++i) {
  19     test({}, Object, true);
  20     test({}, Array, false);
  21     test({}, String, false);
  22     test({}, Foo, false);
  23     test({}, Bar, false);
  24     test([], Object, true);
  25     test([], Array, true);
  26     test([], String, false);
  27     test([], Foo, false);
  28     test([], Bar, false);
  29     test(new Foo(), Object, true);
  30     test(new Foo(), Array, false);
  31     test(new Foo(), String, false);
  32     test(new Foo(), Foo, true);
  33     test(new Foo(), Bar, false);
  34     test(new Bar(), Object, true);
  35     test(new Bar(), Array, false);
  36     test(new Bar(), String, false);
  37     test(new Bar(), Foo, true);
  38     test(new Bar(), Bar, true);
  39 }