1// Copyright 2013 the V8 project authors. All rights reserved.
2// Copyright (C) 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
3//
4// Redistribution and use in source and binary forms, with or without
5// modification, are permitted provided that the following conditions
6// are met:
7// 1.  Redistributions of source code must retain the above copyright
8//     notice, this list of conditions and the following disclaimer.
9// 2.  Redistributions in binary form must reproduce the above copyright
10//     notice, this list of conditions and the following disclaimer in the
11//     documentation and/or other materials provided with the distribution.
12//
13// THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
14// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
15// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
16// DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
17// DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
18// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
19// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
20// ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
21// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
22// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
23
24description('This test makes sure that instance of behaves correctly when the value, constructor, or its prototype are immediates.');
25
26// A Constructor to use check for instances of, and an instance called obj.
27function Constructor() {}
28var obj = new Constructor();
29
30// Run a batch of tests; call'testInstanceOf' three times, passing 1, {}, and the object 'obj', which is an instance of Constructor.
31function testSet(constructor, testMethod)
32{
33    testMethod["1"]("(1 instanceof " + constructor + ")");
34    testMethod["{}"]("({} instanceof " + constructor + ")");
35    testMethod["obj"]("(obj instanceof " + constructor + ")");
36}
37
38// Test set 1, test passing the integer 1 as the constructor to be tested for.
39// The constructor being an object is the first thing tested, so these should all throw.
40testSet("1", { "1":shouldThrow, "{}":shouldThrow, "obj":shouldThrow });
41
42// Test set 2, test passing an empty object ({}) as the constructor to be tested for.
43// As well as being an object, the constructor must implement 'HasInstance' (i.e. be a function), so these should all throw too.
44testSet("{}", { "1":shouldThrow, "{}":shouldThrow, "obj":shouldThrow });
45
46// Test set 3, test passing Constructor as the constructor to be tested for.
47// Nothing should except, the third test should pass, since obj is an instance of Constructor.
48testSet("Constructor", { "1":shouldBeFalse, "{}":shouldBeFalse, "obj":shouldBeTrue });
49
50// Test set 4, test passing Constructor as the constructor to be tested for - with Constructor.prototype set to the integer 1.
51// Constructor.prototype being a non-object will cause an exception, /unless/ value is also a non-object, since this is checked first.
52Constructor.prototype = 1;
53testSet("Constructor", { "1":shouldBeFalse, "{}":shouldThrow, "obj":shouldThrow });
54
55// Test set 5, test passing Constructor as the constructor to be tested for - with Constructor.prototype set to an empty object ({}).
56// All test fail, no reason to throw.  (obj instanceof Constructor) is now false, since Constructor.prototype has changed.
57Constructor.prototype = {};
58testSet("Constructor", { "1":shouldBeFalse, "{}":shouldBeFalse, "obj":shouldBeFalse });
59
60// Test set 6, test passing Constructor as the constructor to be tested for - with Constructor.prototype set to null.
61// Test that behaviour is the same as for test set 4.
62Constructor.prototype = null;
63testSet("Constructor", { "1":shouldBeFalse, "{}":shouldThrow, "obj":shouldThrow });
64