| // Copyright 2015 Microsoft Corporation. All rights reserved. |
| // This code is governed by the license found in the LICENSE file. |
| |
| /*--- |
| description: Elements added after the call to from |
| esid: sec-array.from |
| ---*/ |
| |
| var arrayIndex = -1; |
| var originalLength = 7; |
| var obj = { |
| length: originalLength, |
| 0: 2, |
| 1: 4, |
| 2: 8, |
| 3: 16, |
| 4: 32, |
| 5: 64, |
| 6: 128 |
| }; |
| var array = [2, 4, 8, 16, 32, 64, 128]; |
| |
| function mapFn(value, index) { |
| arrayIndex++; |
| assert.sameValue(value, obj[arrayIndex], 'The value of value is expected to equal the value of obj[arrayIndex]'); |
| assert.sameValue(index, arrayIndex, 'The value of index is expected to equal the value of arrayIndex'); |
| obj[originalLength + arrayIndex] = 2 * arrayIndex + 1; |
| |
| return obj[arrayIndex]; |
| } |
| |
| |
| var a = Array.from(obj, mapFn); |
| assert.sameValue(a.length, array.length, 'The value of a.length is expected to equal the value of array.length'); |
| |
| for (var j = 0; j < a.length; j++) { |
| assert.sameValue(a[j], array[j], 'The value of a[j] is expected to equal the value of array[j]'); |
| } |