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Diffstat (limited to 'js/src/tests/test262/built-ins/Array/prototype/concat/create-non-array.js')
-rw-r--r-- | js/src/tests/test262/built-ins/Array/prototype/concat/create-non-array.js | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Array/prototype/concat/create-non-array.js b/js/src/tests/test262/built-ins/Array/prototype/concat/create-non-array.js new file mode 100644 index 0000000000..6501c3270a --- /dev/null +++ b/js/src/tests/test262/built-ins/Array/prototype/concat/create-non-array.js @@ -0,0 +1,40 @@ +// 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-array.prototype.concat +description: Constructor is ignored for non-Array values +info: | + 1. Let O be ? ToObject(this value). + 2. Let A be ? ArraySpeciesCreate(O, 0). + + 9.4.2.3 ArraySpeciesCreate + + [...] + 3. Let isArray be ? IsArray(originalArray). + 4. If isArray is false, return ? ArrayCreate(length). +---*/ + +var obj = { + length: 0 +}; +var callCount = 0; +var result; +Object.defineProperty(obj, 'constructor', { + get: function() { + callCount += 1; + } +}); + +result = Array.prototype.concat.call(obj); + +assert.sameValue(callCount, 0, 'The value of callCount is expected to be 0'); +assert.sameValue( + Object.getPrototypeOf(result), + Array.prototype, + 'Object.getPrototypeOf(Array.prototype.concat.call(obj)) returns Array.prototype' +); +assert(Array.isArray(result), 'Array.isArray(result) must return true'); +assert.sameValue(result.length, 1, 'The value of result.length is expected to be 1'); +assert.sameValue(result[0], obj, 'The value of result[0] is expected to equal the value of obj'); + +reportCompare(0, 0); |