diff options
Diffstat (limited to 'js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_spreadable-number-wrapper.js')
-rw-r--r-- | js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_spreadable-number-wrapper.js | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_spreadable-number-wrapper.js b/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_spreadable-number-wrapper.js new file mode 100644 index 0000000000..08923aa009 --- /dev/null +++ b/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_spreadable-number-wrapper.js @@ -0,0 +1,43 @@ +// Copyright (c) 2014 the V8 project authors. All rights reserved. +// Use of this source code is governed by a BSD-style license that can be +// found in the LICENSE file. + + +/*--- +esid: sec-array.prototype.concat +description: Array.prototype.concat Symbol.isConcatSpreadable number wrapper +includes: [compareArray.js] +features: [Symbol.isConcatSpreadable] +---*/ +var num = new Number(true) +// Number wrapper objects are not concat-spreadable by default +assert.compareArray([num], [].concat(num), '[num] must return the same value returned by [].concat(num)'); + +// Number wrapper objects may be individually concat-spreadable +num[Symbol.isConcatSpreadable] = true; +num.length = 3; +num[0] = 1, num[1] = 2, num[2] = 3; +assert.compareArray([1, 2, 3], [].concat(num), '[1, 2, 3] must return the same value returned by [].concat(num)'); + +Number.prototype[Symbol.isConcatSpreadable] = true; +// Number wrapper objects may be concat-spreadable +assert.compareArray([], [].concat(new Number(123)), + '[] must return the same value returned by [].concat(new Number(123))' +); +Number.prototype[0] = 1; +Number.prototype[1] = 2; +Number.prototype[2] = 3; +Number.prototype.length = 3; +assert.compareArray([1, 2, 3], [].concat(new Number(123)), + '[1, 2, 3] must return the same value returned by [].concat(new Number(123))' +); + +// Number values are never concat-spreadable +assert.compareArray([true], [].concat(true), '[true] must return the same value returned by [].concat(true)'); +delete Number.prototype[Symbol.isConcatSpreadable]; +delete Number.prototype[0]; +delete Number.prototype[1]; +delete Number.prototype[2]; +delete Number.prototype.length; + +reportCompare(0, 0); |