diff options
Diffstat (limited to 'js/src/tests/test262/built-ins/Array/prototype/concat/create-species.js')
-rw-r--r-- | js/src/tests/test262/built-ins/Array/prototype/concat/create-species.js | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Array/prototype/concat/create-species.js b/js/src/tests/test262/built-ins/Array/prototype/concat/create-species.js new file mode 100644 index 0000000000..60cc7138a5 --- /dev/null +++ b/js/src/tests/test262/built-ins/Array/prototype/concat/create-species.js @@ -0,0 +1,48 @@ +// 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: Species constructor is used to create a new instance +info: | + 1. Let O be ? ToObject(this value). + 2. Let A be ? ArraySpeciesCreate(O, 0). + + 9.4.2.3 ArraySpeciesCreate + + [...] + 5. Let C be ? Get(originalArray, "constructor"). + [...] + 7. If Type(C) is Object, then + a. Let C be ? Get(C, @@species). + b. If C is null, let C be undefined. + [...] + 10. Return ? Construct(C, « length »). +features: [Symbol.species] +---*/ + +var thisValue, args, result; +var callCount = 0; +var instance = []; +var Ctor = function() { + callCount += 1; + thisValue = this; + args = arguments; + return instance; +}; +var a = []; +a.constructor = {}; +a.constructor[Symbol.species] = Ctor; + +result = a.concat(); + +assert.sameValue(callCount, 1, 'The value of callCount is expected to be 1'); +assert.sameValue( + Object.getPrototypeOf(thisValue), + Ctor.prototype, + 'Object.getPrototypeOf(this) returns Ctor.prototype' +); +assert.sameValue(args.length, 1, 'The value of args.length is expected to be 1'); +assert.sameValue(args[0], 0, 'The value of args[0] is expected to be 0'); +assert.sameValue(result, instance, 'The value of result is expected to equal the value of instance'); + +reportCompare(0, 0); |