| // Copyright (C) 2016 the V8 project authors. All rights reserved. |
| // This code is governed by the BSD license found in the LICENSE file. |
| /*--- |
| esid: sec-integer-indexed-exotic-objects-defineownproperty-p-desc |
| description: > |
| Returns false if numericIndex is "-0" |
| info: | |
| 9.4.5.3 [[DefineOwnProperty]] ( P, Desc) |
| ... |
| 3. If Type(P) is String, then |
| a. Let numericIndex be ! CanonicalNumericIndexString(P). |
| b. If numericIndex is not undefined, then |
| i. If IsInteger(numericIndex) is false, return false. |
| ii. Let intIndex be numericIndex. |
| iii. If intIndex = -0, return false. |
| ... |
| includes: [testTypedArray.js] |
| features: [Reflect, TypedArray] |
| ---*/ |
| |
| testWithTypedArrayConstructors(function(TA) { |
| var sample = new TA(2); |
| |
| assert.sameValue( |
| Reflect.defineProperty(sample, "-0", { |
| value: 42, |
| configurable: false, |
| enumerable: true, |
| writable: true |
| }), |
| false, |
| "defineProperty returns false" |
| ); |
| assert.sameValue(sample[0], 0, "does not change the value for [0]"); |
| assert.sameValue(sample["-0"], undefined, "does define a value for ['-0']"); |
| }); |