// Copyright (c) 2012 Ecma International. All rights reserved. // This code is governed by the BSD license found in the LICENSE file. /*--- info: > Refer 11.1.4; The production ElementList : ElementList , Elisionopt AssignmentExpression 6.Call the [[DefineOwnProperty]] internal method of array with arguments ToString(ToUint32((pad+len)) and the Property Descriptor { [[Value]]: initValue , [[Writable]]: true, [[Enumerable]]: true, [[Configurable]]: true}, and false. es5id: 11.1.4_5-6-1 description: > Initialize array using ElementList (ElementList , Elisionopt AssignmentExpression) when index property (read-only) exists in Array.prototype (step 6) includes: [runTestCase.js] ---*/ function testcase() { try { Object.defineProperty(Array.prototype, "1", { value: 100, writable: false, configurable: true }); var arr = [101, 12]; return arr.hasOwnProperty("1") && arr[1] === 12; } finally { delete Array.prototype[1]; } } runTestCase(testcase);