| // Copyright (C) 2017 André Bargull. All rights reserved. |
| // This code is governed by the BSD license found in the LICENSE file. |
| |
| /*--- |
| esid: sec-array.prototype.splice |
| description: > |
| A value is inserted in an array-like object whose length property is near the integer limit. |
| info: | |
| ... |
| 16. Else if itemCount > actualDeleteCount, then |
| a. Let k be (len - actualDeleteCount). |
| b. Repeat, while k > actualStart |
| i. Let from be ! ToString(k + actualDeleteCount - 1). |
| ii. Let to be ! ToString(k + itemCount - 1). |
| iii. Let fromPresent be ? HasProperty(O, from). |
| iv. If fromPresent is true, then |
| 1. Let fromValue be ? Get(O, from). |
| 2. Perform ? Set(O, to, fromValue, true). |
| v. Else fromPresent is false, |
| 1. Perform ? DeletePropertyOrThrow(O, to). |
| vi. Decrease k by 1. |
| ... |
| includes: [compareArray.js] |
| ---*/ |
| |
| var arrayLike = { |
| "9007199254740985": "9007199254740985", |
| "9007199254740986": "9007199254740986", |
| "9007199254740987": "9007199254740987", |
| /* "9007199254740988": hole */ |
| "9007199254740989": "9007199254740989", |
| /* "9007199254740990": empty */ |
| "9007199254740991": "9007199254740991", |
| length: 2 ** 53 - 2, |
| }; |
| |
| var result = Array.prototype.splice.call(arrayLike, 9007199254740986, 0, "new-value"); |
| |
| assert.compareArray(result, [], "No elements are removed"); |
| |
| assert.sameValue(arrayLike.length, 2 ** 53 - 1, "New length is 2**53 - 1"); |
| |
| assert.sameValue(arrayLike["9007199254740985"], "9007199254740985", |
| "arrayLike['9007199254740985'] is unchanged"); |
| |
| assert.sameValue(arrayLike["9007199254740986"], "new-value", |
| "arrayLike['9007199254740986'] contains the inserted value"); |
| |
| assert.sameValue(arrayLike["9007199254740987"], "9007199254740986", |
| "arrayLike['9007199254740986'] is moved to arrayLike['9007199254740987']"); |
| |
| assert.sameValue(arrayLike["9007199254740988"], "9007199254740987", |
| "arrayLike['9007199254740987'] is moved to arrayLike['9007199254740988']"); |
| |
| assert.sameValue("9007199254740989" in arrayLike, false, |
| "arrayLike['9007199254740989'] is removed"); |
| |
| assert.sameValue(arrayLike["9007199254740990"], "9007199254740989", |
| "arrayLike['9007199254740989'] is moved to arrayLike['9007199254740990']"); |
| |
| assert.sameValue(arrayLike["9007199254740991"], "9007199254740991", |
| "arrayLike['9007199254740991'] is unchanged"); |