• Home
  • Line#
  • Scopes#
  • Navigate#
  • Raw
  • Download
1// Copyright 2010 the V8 project authors. All rights reserved.
2// Redistribution and use in source and binary forms, with or without
3// modification, are permitted provided that the following conditions are
4// met:
5//
6//     * Redistributions of source code must retain the above copyright
7//       notice, this list of conditions and the following disclaimer.
8//     * Redistributions in binary form must reproduce the above
9//       copyright notice, this list of conditions and the following
10//       disclaimer in the documentation and/or other materials provided
11//       with the distribution.
12//     * Neither the name of Google Inc. nor the names of its
13//       contributors may be used to endorse or promote products derived
14//       from this software without specific prior written permission.
15//
16// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27
28// Flags: --allow-natives-syntax
29
30// Test String.fromCharCode.
31
32// Test char codes larger than 0xffff.
33var expected = "";
34for (var i = 100; i < 500; i++) {
35  expected += String.fromCharCode(i);
36}
37
38function testCharCodeTruncation() {
39  var result = "";
40  for (var i = 0x100000 + 100; i < 0x100000 + 500; i++) {
41    result += String.fromCharCode(i);
42  }
43  assertEquals(String.fromCharCode(0xFFFF), String.fromCharCode(0xFFFFFFFF));
44  return result;
45}
46
47assertEquals(expected, testCharCodeTruncation());
48assertEquals(expected, testCharCodeTruncation());
49%OptimizeFunctionOnNextCall(testCharCodeTruncation);
50assertEquals(expected, testCharCodeTruncation());
51
52// Test various receivers and arguments passed to String.fromCharCode.
53
54Object.prototype.fromCharCode = function(x) { return this; };
55
56var fcc = String.fromCharCode;
57var fcc2 = fcc;
58
59function constFun(x) { return function(y) { return x; }; }
60
61function test(num) {
62  assertEquals(" ", String.fromCharCode(0x20));
63  assertEquals(" ", String.fromCharCode(0x20 + 0x10000));
64  assertEquals(" ", String.fromCharCode(0x20 - 0x10000));
65  assertEquals(" ", String.fromCharCode(0x20 + 0.5));
66
67  assertEquals("\u1234", String.fromCharCode(0x1234));
68  assertEquals("\u1234", String.fromCharCode(0x1234 + 0x10000));
69  assertEquals("\u1234", String.fromCharCode(0x1234 - 0x10000));
70  assertEquals("\u1234", String.fromCharCode(0x1234 + 0.5));
71
72  assertEquals("  ", String.fromCharCode(0x20, 0x20));
73  assertEquals("  ", String.fromCharCode(0x20 + 0.5, 0x20));
74
75  assertEquals(" ", fcc(0x20));
76  assertEquals(" ", fcc(0x20 + 0x10000));
77  assertEquals(" ", fcc(0x20 - 0x10000));
78  assertEquals(" ", fcc(0x20 + 0.5));
79
80  assertEquals("\u1234", fcc(0x1234));
81  assertEquals("\u1234", fcc(0x1234 + 0x10000));
82  assertEquals("\u1234", fcc(0x1234 - 0x10000));
83  assertEquals("\u1234", fcc(0x1234 + 0.5));
84
85  assertEquals("  ", fcc(0x20, 0x20));
86  assertEquals("  ", fcc(0x20 + 0.5, 0x20));
87
88  var receiver = (num < 5) ? String : (num < 9) ? "dummy" : 42;
89  fcc2 = (num < 5) ? fcc
90                   : (num < 9) ? constFun(Object("dummy"))
91                               : constFun(Object(42));
92  var expected = (num < 5) ? " " : (num < 9) ? Object("dummy") : Object(42);
93  assertEquals(expected, receiver.fromCharCode(0x20));
94  assertEquals(expected, receiver.fromCharCode(0x20 - 0x10000));
95  assertEquals(expected, receiver.fromCharCode(0x20 + 0.5));
96  assertEquals(expected, fcc2(0x20));
97  assertEquals(expected, fcc2(0x20 - 0x10000));
98  assertEquals(expected, fcc2(0x20 + 0.5));
99}
100
101// Use loop to test the custom IC.
102for (var i = 0; i < 10; i++) {
103  test(i);
104}
105
106// Test the custom IC works correctly when the map changes.
107for (var i = 0; i < 10; i++) {
108  var expected = (i < 5) ? " " : 42;
109  if (i == 5) String.fromCharCode = function() { return 42; };
110  assertEquals(expected, String.fromCharCode(0x20));
111}
112