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 24 description('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. 27 function Constructor() {} 28 var 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. 31 function 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. 40 testSet("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. 44 testSet("{}", { "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. 48 testSet("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. 52 Constructor.prototype = 1; 53 testSet("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. 57 Constructor.prototype = {}; 58 testSet("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. 62 Constructor.prototype = null; 63 testSet("Constructor", { "1":shouldBeFalse, "{}":shouldThrow, "obj":shouldThrow }); 64
