// Copyright 2013 the V8 project authors. All rights reserved. // Copyright (C) 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved. // // Redistribution and use in source and binary forms, with or without // modification, are permitted provided that the following conditions // are met: // 1. Redistributions of source code must retain the above copyright // notice, this list of conditions and the following disclaimer. // 2. Redistributions in binary form must reproduce the above copyright // notice, this list of conditions and the following disclaimer in the // documentation and/or other materials provided with the distribution. // // THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY // EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED // WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE // DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY // DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES // (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; // LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON // ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. description("Test to ensure correct behaviour of prototype caching with dictionary prototypes"); function protoTest(o) { return o.protoProp; } var proto = {protoProp: "PASS", propToRemove: "foo"}; var o = { __proto__: proto }; delete proto.propToRemove; // Prototype lookup caching will attempt to convert proto back to an ordinary structure protoTest(o); protoTest(o); protoTest(o); shouldBe("protoTest(o)", "'PASS'"); delete proto.protoProp; proto.fakeProtoProp = "FAIL"; shouldBeUndefined("protoTest(o)"); function protoTest2(o) { return o.b; } var proto = {a:1, b:"meh", c:2}; var o = { __proto__: proto }; delete proto.b; proto.d = 3; protoTest2(o); protoTest2(o); protoTest2(o); var protoKeys = []; for (var i in proto) protoKeys.push(proto[i]); shouldBe("protoKeys", "[1,2,3]"); function protoTest3(o) { return o.b; } var proto = {a:1, b:"meh", c:2}; var o = { __proto__: proto }; delete proto.b; protoTest2(o); protoTest2(o); protoTest2(o); proto.d = 3; var protoKeys = []; for (var i in proto) protoKeys.push(proto[i]); shouldBe("protoKeys", "[1,2,3]"); function testFunction(o) { return o.test; } var proto = { test: true }; var subclass1 = { __proto__: proto }; var subclass2 = { __proto__: proto }; for (var i = 0; i < 500; i++) subclass2["a"+i]="a"+i; testFunction(subclass1); shouldBeTrue("testFunction(subclass1)"); shouldBeTrue("testFunction(subclass2)"); proto.test = false subclass2.test = true; shouldBeTrue("testFunction(subclass2)");