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// Copyright (C) 2017 Mozilla Corporation. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-integer-indexed-exotic-objects-defineownproperty-p-desc
description: >
Defining a typed array element to a value that, when converted to the typed
array element type, detaches the typed array's underlying buffer, should
return true and not modify the typed array.
info: |
9.4.5.3 [[DefineOwnProperty]] ( P, Desc )
...
3. If Type(P) is String, then
a. Let numericIndex be ! CanonicalNumericIndexString(P).
b. If numericIndex is not undefined, then
...
x. If Desc has a [[Value]] field, then
1. Let value be Desc.[[Value]].
2. Return ? IntegerIndexedElementSet(O, numericIndex, value).
...
IntegerIndexedElementSet ( O, index, value )
Assert: O is an Integer-Indexed exotic object.
If O.[[ContentType]] is BigInt, let numValue be ? ToBigInt(value).
Otherwise, let numValue be ? ToNumber(value).
Let buffer be O.[[ViewedArrayBuffer]].
If IsDetachedBuffer(buffer) is false and ! IsValidIntegerIndex(O, index) is true, then
Let offset be O.[[ByteOffset]].
Let arrayTypeName be the String value of O.[[TypedArrayName]].
Let elementSize be the Element Size value specified in Table 62 for arrayTypeName.
Let indexedPosition be (ℝ(index) × elementSize) + offset.
Let elementType be the Element Type value in Table 62 for arrayTypeName.
Perform SetValueInBuffer(buffer, indexedPosition, elementType, numValue, true, Unordered).
Return NormalCompletion(undefined).
includes: [testTypedArray.js, detachArrayBuffer.js]
features: [align-detached-buffer-semantics-with-web-reality, Reflect, TypedArray]
---*/
testWithTypedArrayConstructors(function(TA) {
var ta = new TA([17]);
var desc =
{
value: {
valueOf() {
$DETACHBUFFER(ta.buffer);
return 42;
}
}
};
assert.sameValue(
Reflect.defineProperty(ta, 0, desc),
true,
'Reflect.defineProperty(ta, 0, {value: {valueOf() {$DETACHBUFFER(ta.buffer); return 42;}}} ) must return true'
);
assert.sameValue(ta[0], undefined, 'The value of ta[0] is expected to equal `undefined`');
});
reportCompare(0, 0);
|
