string-fromcharcode.js revision 8b112d2025046f85ef7f6be087c6129c872ebad2 
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27
28// Test String.fromCharCode.
29
30
31// Test various receivers and arguments passed to String.fromCharCode.
32
33Object.prototype.fromCharCode = function(x) { return this; };
34
35var fcc = String.fromCharCode;
36var fcc2 = fcc;
37
38function constFun(x) { return function(y) { return x; }; }
39
40function test(num) {
41  assertEquals(" ", String.fromCharCode(0x20));
42  assertEquals(" ", String.fromCharCode(0x20 + 0x10000));
43  assertEquals(" ", String.fromCharCode(0x20 - 0x10000));
44  assertEquals(" ", String.fromCharCode(0x20 + 0.5));
45
46  assertEquals("\u1234", String.fromCharCode(0x1234));
47  assertEquals("\u1234", String.fromCharCode(0x1234 + 0x10000));
48  assertEquals("\u1234", String.fromCharCode(0x1234 - 0x10000));
49  assertEquals("\u1234", String.fromCharCode(0x1234 + 0.5));
50
51  assertEquals("  ", String.fromCharCode(0x20, 0x20));
52  assertEquals("  ", String.fromCharCode(0x20 + 0.5, 0x20));
53
54  assertEquals(" ", fcc(0x20));
55  assertEquals(" ", fcc(0x20 + 0x10000));
56  assertEquals(" ", fcc(0x20 - 0x10000));
57  assertEquals(" ", fcc(0x20 + 0.5));
58
59  assertEquals("\u1234", fcc(0x1234));
60  assertEquals("\u1234", fcc(0x1234 + 0x10000));
61  assertEquals("\u1234", fcc(0x1234 - 0x10000));
62  assertEquals("\u1234", fcc(0x1234 + 0.5));
63
64  assertEquals("  ", fcc(0x20, 0x20));
65  assertEquals("  ", fcc(0x20 + 0.5, 0x20));
66
67  var receiver = (num < 5) ? String : (num < 9) ? "dummy" : 42;
68  fcc2 = (num < 5) ? fcc
69                   : (num < 9) ? constFun(Object("dummy"))
70                               : constFun(Object(42));
71  var expected = (num < 5) ? " " : (num < 9) ? Object("dummy") : Object(42);
72  assertEquals(expected, receiver.fromCharCode(0x20));
73  assertEquals(expected, receiver.fromCharCode(0x20 - 0x10000));
74  assertEquals(expected, receiver.fromCharCode(0x20 + 0.5));
75  assertEquals(expected, fcc2(0x20));
76  assertEquals(expected, fcc2(0x20 - 0x10000));
77  assertEquals(expected, fcc2(0x20 + 0.5));
78}
79
80// Use loop to test the custom IC.
81for (var i = 0; i < 10; i++) {
82  test(i);
83}
84
85
86// Test the custom IC works correctly when the map changes.
87for (var i = 0; i < 10; i++) {
88  var expected = (i < 5) ? " " : 42;
89  if (i == 5) String.fromCharCode = function() { return 42; };
90  assertEquals(expected, String.fromCharCode(0x20));
91}
92