1// Copyright 2008 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 28assertTrue({} instanceof Object); 29assertTrue([] instanceof Object); 30 31assertFalse({} instanceof Array); 32assertTrue([] instanceof Array); 33 34function TestChains() { 35 var A = {}; 36 var B = {}; 37 var C = {}; 38 B.__proto__ = A; 39 C.__proto__ = B; 40 41 function F() { } 42 F.prototype = A; 43 assertTrue(C instanceof F); 44 assertTrue(B instanceof F); 45 assertFalse(A instanceof F); 46 47 F.prototype = B; 48 assertTrue(C instanceof F); 49 assertFalse(B instanceof F); 50 assertFalse(A instanceof F); 51 52 F.prototype = C; 53 assertFalse(C instanceof F); 54 assertFalse(B instanceof F); 55 assertFalse(A instanceof F); 56} 57 58TestChains(); 59 60 61function TestExceptions() { 62 function F() { } 63 var items = [ 1, new Number(42), 64 true, 65 'string', new String('hest'), 66 {}, [], 67 F, new F(), 68 Object, String ]; 69 70 var exceptions = 0; 71 var instanceofs = 0; 72 73 for (var i = 0; i < items.length; i++) { 74 for (var j = 0; j < items.length; j++) { 75 try { 76 if (items[i] instanceof items[j]) instanceofs++; 77 } catch (e) { 78 assertTrue(e instanceof TypeError); 79 exceptions++; 80 } 81 } 82 } 83 assertEquals(10, instanceofs); 84 assertEquals(88, exceptions); 85 86 // Make sure to throw an exception if the function prototype 87 // isn't a proper JavaScript object. 88 function G() { } 89 G.prototype = undefined; 90 assertThrows("({} instanceof G)"); 91} 92 93TestExceptions(); 94