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// 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%.prototype.copywithin
description: Preservation of bit-level encoding
info: |
Array.prototype.copyWithin (target, start [ , end ] )
12. Repeat, while count > 0
[...]
d. If fromPresent is true, then
i. Let fromVal be ? Get(O, fromKey).
ii. Perform ? Set(O, toKey, fromVal, true).
includes: [nans.js, compareArray.js, testTypedArray.js]
features: [TypedArray]
---*/
function body(FloatArray) {
var subject = new FloatArray(NaNs.length * 2);
NaNs.forEach(function(v, i) {
subject[i] = v;
});
var originalBytes, copiedBytes;
var length = NaNs.length * FloatArray.BYTES_PER_ELEMENT;
originalBytes = new Uint8Array(
subject.buffer,
0,
length
);
subject.copyWithin(NaNs.length, 0);
copiedBytes = new Uint8Array(
subject.buffer,
length
);
assert(compareArray(originalBytes, copiedBytes));
}
testWithTypedArrayConstructors(body, [Float32Array, Float64Array]);
reportCompare(0, 0);
|
