JezK
Edit File: object-keys.js
// Copyright (c) 2006 Apple Computer, 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. // // 3. Neither the name of the copyright holder(s) nor the names of any // contributors may be used to endorse or promote products derived // from this software without specific prior written permission. // // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 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 THE // COPYRIGHT OWNER OR 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. // Based on LayoutTests/fast/js/Object-keys.html assertThrows(function () { Object.keys(2) }, TypeError); assertThrows(function () { Object.keys("foo") }, TypeError); assertThrows(function () { Object.keys(null) }, TypeError); assertThrows(function () { Object.keys(undefined) }, TypeError); assertEquals(Object.keys({}), []); assertEquals(Object.keys({a:null}), ['a']); assertEquals(Object.keys({a:null, b:null}), ['a', 'b']); assertEquals(Object.keys({b:null, a:null}), ['b', 'a']); assertEquals(Object.keys([]), []); assertEquals(Object.keys([null]), ['0']); assertEquals(Object.keys([null,null]), ['0', '1']); assertEquals(Object.keys([null,null,,,,null]), ['0', '1', '5']); assertEquals(Object.keys({__proto__:{a:null}}), []); assertEquals(Object.keys({__proto__:[1,2,3]}), []); var x = []; x.__proto__ = [1, 2, 3]; assertEquals(Object.keys(x), []); assertEquals(Object.keys(function () {}), []); assertEquals('string', typeof(Object.keys([1])[0])); function argsTest(a, b, c) { assertEquals(['0', '1', '2'], Object.keys(arguments)); } argsTest(1, 2, 3); var literal = {a: 1, b: 2, c: 3}; var keysBefore = Object.keys(literal); assertEquals(['a', 'b', 'c'], keysBefore); keysBefore[0] = 'x'; var keysAfter = Object.keys(literal); assertEquals(['a', 'b', 'c'], keysAfter); assertEquals(['x', 'b', 'c'], keysBefore);