value-callic-prototype-change.js revision a7e24c173cf37484693b9abb38e494fa7bd7baeb 
1// Copyright 2008 the V8 project authors. All rights reserved.
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3// modification, are permitted provided that the following conditions are
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5//
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27
28// Test that the inline caches correctly detect that constant
29// functions on value prototypes change.
30
31function testString() {
32  function f(s, expected) {
33    var result = s.toString();
34    assertEquals(expected, result);
35  };
36
37  for (var i = 0; i < 10; i++) {
38    var s = String.fromCharCode(i);
39    f(s, s);
40  }
41
42  String.prototype.toString = function() { return "ostehaps"; };
43
44  for (var i = 0; i < 10; i++) {
45    var s = String.fromCharCode(i);
46    f(s, "ostehaps");
47  }
48}
49
50testString();
51
52
53function testNumber() {
54  Number.prototype.toString = function() { return 0; };
55
56  function f(n, expected) {
57    var result = n.toString();
58    assertEquals(expected, result);
59  };
60
61  for (var i = 0; i < 10; i++) {
62    f(i, 0);
63  }
64
65  Number.prototype.toString = function() { return 42; };
66
67  for (var i = 0; i < 10; i++) {
68    f(i, 42);
69  }
70}
71
72testNumber();
73
74
75function testBoolean() {
76  Boolean.prototype.toString = function() { return 0; };
77
78  function f(b, expected) {
79    var result = b.toString();
80    assertEquals(expected, result);
81  };
82
83  for (var i = 0; i < 10; i++) {
84    f((i % 2 == 0), 0);
85  }
86
87  Boolean.prototype.toString = function() { return 42; };
88
89  for (var i = 0; i < 10; i++) {
90    f((i % 2 == 0), 42);
91  }
92}
93
94testBoolean();
95