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Diffstat (limited to 'test/built-ins/TypedArrays/ctors/object-arg/use-custom-proto-if-object.js')
-rw-r--r-- | test/built-ins/TypedArrays/ctors/object-arg/use-custom-proto-if-object.js | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/test/built-ins/TypedArrays/ctors/object-arg/use-custom-proto-if-object.js b/test/built-ins/TypedArrays/ctors/object-arg/use-custom-proto-if-object.js new file mode 100644 index 000000000..bb5754a9c --- /dev/null +++ b/test/built-ins/TypedArrays/ctors/object-arg/use-custom-proto-if-object.js @@ -0,0 +1,47 @@ +// 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-object +description: > + Use prototype from new target if it's an Object +info: | + 22.2.4.4 TypedArray ( object ) + + This description applies only if the TypedArray function is called with at + least one argument and the Type of the first argument is Object and that + object does not have either a [[TypedArrayName]] or an [[ArrayBufferData]] + internal slot. + + ... + 3. Let O be ? AllocateTypedArray(TypedArray.[[TypedArrayConstructorName]], + NewTarget, "%TypedArrayPrototype%"). + ... + + 22.2.4.2.1 Runtime Semantics: AllocateTypedArray (constructorName, newTarget, + defaultProto [ , length ]) + + 1. Let proto be ? GetPrototypeFromConstructor(newTarget, defaultProto). + 2. Let obj be IntegerIndexedObjectCreate (proto, «[[ViewedArrayBuffer]], + [[TypedArrayName]], [[ByteLength]], [[ByteOffset]], [[ArrayLength]]» ). + ... + + 9.4.5.7 IntegerIndexedObjectCreate (prototype, internalSlotsList) + + ... + 10. Set the [[Prototype]] internal slot of A to prototype. + ... + 12. Return A. +includes: [testTypedArray.js] +features: [Reflect, TypedArray] +---*/ + +function newTarget() {} +var proto = {}; +newTarget.prototype = proto; + +testWithTypedArrayConstructors(function(TA) { + var ta = Reflect.construct(TA, [], newTarget); + + assert.sameValue(ta.constructor, Object); + assert.sameValue(Object.getPrototypeOf(ta), proto); +}); |