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Diffstat (limited to 'js/src/tests/test262/built-ins/TypedArrayConstructors/from/custom-ctor-returns-other-instance.js')
-rw-r--r-- | js/src/tests/test262/built-ins/TypedArrayConstructors/from/custom-ctor-returns-other-instance.js | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/TypedArrayConstructors/from/custom-ctor-returns-other-instance.js b/js/src/tests/test262/built-ins/TypedArrayConstructors/from/custom-ctor-returns-other-instance.js new file mode 100644 index 0000000000..9083ca3c08 --- /dev/null +++ b/js/src/tests/test262/built-ins/TypedArrayConstructors/from/custom-ctor-returns-other-instance.js @@ -0,0 +1,52 @@ +// 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-%typedarray%.from +description: > + Custom constructor can return any TypedArray instance with higher or same + length +info: | + %TypedArray%.from ( source [ , mapfn [ , thisArg ] ] ) + + ... + 7. If usingIterator is not undefined, then + a. Let values be ? IterableToList(source, usingIterator). + b. Let len be the number of elements in values. + c. Let targetObj be ? TypedArrayCreate(C, «len»). + ... + 10. Let len be ? ToLength(? Get(arrayLike, "length")). + 11. Let targetObj be ? TypedArrayCreate(C, « len »). + ... +includes: [testTypedArray.js] +features: [Symbol.iterator, TypedArray] +---*/ + +var sourceItor = [1, 2]; +var sourceObj = { + length: 2 +}; + +testWithTypedArrayConstructors(function(TA) { + var result; + var custom = new TA(2); + var ctor = function() { + return custom; + }; + + result = TypedArray.from.call(ctor, sourceItor); + assert.sameValue(result, custom, "using iterator, same length"); + + result = TypedArray.from.call(ctor, sourceObj); + assert.sameValue(result, custom, "not using iterator, same length"); + + custom = new TA(3); + + result = TypedArray.from.call(ctor, sourceItor); + assert.sameValue(result, custom, "using iterator, higher length"); + + result = TypedArray.from.call(ctor, sourceObj); + assert.sameValue(result, custom, "not using iterator, higher length"); +}); + +reportCompare(0, 0); |