diff options
Diffstat (limited to 'js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_spreadable-string-wrapper.js')
-rw-r--r-- | js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_spreadable-string-wrapper.js | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_spreadable-string-wrapper.js b/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_spreadable-string-wrapper.js new file mode 100644 index 0000000000..e44fbc769a --- /dev/null +++ b/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_spreadable-string-wrapper.js @@ -0,0 +1,34 @@ +// 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 string wrapper +includes: [compareArray.js] +features: [Symbol.isConcatSpreadable] +---*/ +var str1 = new String("yuck\uD83D\uDCA9") +// String wrapper objects are not concat-spreadable by default +assert.compareArray([str1], [].concat(str1), '[str1] must return the same value returned by [].concat(str1)'); + +// String wrapper objects may be individually concat-spreadable +str1[Symbol.isConcatSpreadable] = true; +assert.compareArray(["y", "u", "c", "k", "\uD83D", "\uDCA9"], [].concat(str1), + '["y", "u", "c", "k", "uD83D", "uDCA9"] must return the same value returned by [].concat(str1)' +); + +String.prototype[Symbol.isConcatSpreadable] = true; +// String wrapper objects may be concat-spreadable +assert.compareArray(["y", "u", "c", "k", "\uD83D", "\uDCA9"], [].concat(new String("yuck\uD83D\uDCA9")), + '["y", "u", "c", "k", "uD83D", "uDCA9"] must return the same value returned by [].concat(new String("yuckuD83DuDCA9"))' +); + +// String values are never concat-spreadable +assert.compareArray(["yuck\uD83D\uDCA9"], [].concat("yuck\uD83D\uDCA9"), + '["yuckuD83DuDCA9"] must return the same value returned by [].concat("yuckuD83DuDCA9")' +); +delete String.prototype[Symbol.isConcatSpreadable]; + +reportCompare(0, 0); |