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("Test to ensure correct behaviour of prototype caching with dictionary prototypes"); 25 26function protoTest(o) { 27 return o.protoProp; 28} 29 30var proto = {protoProp: "PASS", propToRemove: "foo"}; 31var o = { __proto__: proto }; 32 33delete proto.propToRemove; 34 35// Prototype lookup caching will attempt to convert proto back to an ordinary structure 36protoTest(o); 37protoTest(o); 38protoTest(o); 39shouldBe("protoTest(o)", "'PASS'"); 40delete proto.protoProp; 41proto.fakeProtoProp = "FAIL"; 42shouldBeUndefined("protoTest(o)"); 43 44function protoTest2(o) { 45 return o.b; 46} 47 48var proto = {a:1, b:"meh", c:2}; 49var o = { __proto__: proto }; 50 51delete proto.b; 52proto.d = 3; 53protoTest2(o); 54protoTest2(o); 55protoTest2(o); 56var protoKeys = []; 57for (var i in proto) 58 protoKeys.push(proto[i]); 59 60shouldBe("protoKeys", "[1,2,3]"); 61 62function protoTest3(o) { 63 return o.b; 64} 65 66var proto = {a:1, b:"meh", c:2}; 67var o = { __proto__: proto }; 68 69delete proto.b; 70protoTest2(o); 71protoTest2(o); 72protoTest2(o); 73proto.d = 3; 74var protoKeys = []; 75for (var i in proto) 76 protoKeys.push(proto[i]); 77 78shouldBe("protoKeys", "[1,2,3]"); 79 80function testFunction(o) { 81 return o.test; 82} 83 84var proto = { test: true }; 85var subclass1 = { __proto__: proto }; 86var subclass2 = { __proto__: proto }; 87for (var i = 0; i < 500; i++) 88 subclass2["a"+i]="a"+i; 89 90testFunction(subclass1); 91shouldBeTrue("testFunction(subclass1)"); 92shouldBeTrue("testFunction(subclass2)"); 93proto.test = false 94subclass2.test = true; 95shouldBeTrue("testFunction(subclass2)"); 96