regress-485.js revision d0582a6c46733687d045e4188a1bcd0123c758a1 
1// Copyright 2009 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// See: http://code.google.com/p/v8/issues/detail?id=485
29
30// Ensure that we don't expose the builtins object when calling
31// builtin functions that use or return "this".
32
33var global = this;
34var global2 = (function(){return this;})();
35assertEquals(global, global2, "direct call to local function returns global");
36
37var builtin = Object.prototype.valueOf;  // Builtin function that returns this.
38
39assertEquals(global, builtin(), "Direct call to builtin");
40
41assertEquals(global, builtin.call(), "call() to builtin");
42assertEquals(global, builtin.call(null), "call(null) to builtin");
43assertEquals(global, builtin.call(undefined), "call(undefined) to builtin");
44
45assertEquals(global, builtin.apply(), "apply() to builtin");
46assertEquals(global, builtin.apply(null), "apply(null) to builtin");
47assertEquals(global, builtin.apply(undefined), "apply(undefined) to builtin");
48
49assertEquals(global, builtin.call.call(builtin), "call.call() to builtin");
50assertEquals(global, builtin.call.apply(builtin), "call.apply() to builtin");
51assertEquals(global, builtin.apply.call(builtin), "apply.call() to builtin");
52assertEquals(global, builtin.apply.apply(builtin), "apply.apply() to builtin");
53
54
55// Builtin that depends on value of this to compute result.
56var builtin2 = Object.prototype.toString;
57
58// Global object has class "Object" according to Object.prototype.toString.
59// Builtins object displays as "[object builtins]".
60assertTrue("[object builtins]" != builtin2(), "Direct call to toString");
61assertTrue("[object builtins]" != builtin2.call(), "call() to toString");
62assertTrue("[object builtins]" != builtin2.apply(), "call() to toString");
63assertTrue("[object builtins]" != builtin2.call.call(builtin2),
64           "call.call() to toString");
65