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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.fill
description: >
Fills all the elements from a with a custom end index.
info: |
22.2.3.8 %TypedArray%.prototype.fill (value [ , start [ , end ] ] )
%TypedArray%.prototype.fill is a distinct function that implements the same
algorithm as Array.prototype.fill as defined in 22.1.3.6 except that the this
object's [[ArrayLength]] internal slot is accessed in place of performing a
[[Get]] of "length". The implementation of the algorithm may be optimized with
the knowledge that the this value is an object that has a fixed length and
whose integer indexed properties are not sparse. However, such optimization
must not introduce any observable changes in the specified behaviour of the
algorithm.
...
22.1.3.6 Array.prototype.fill (value [ , start [ , end ] ] )
...
5. If end is undefined, let relativeEnd be len; else let relativeEnd be ?
ToInteger(end).
6. If relativeEnd < 0, let final be max((len + relativeEnd), 0); else let
final be min(relativeEnd, len).
...
includes: [compareArray.js, testTypedArray.js]
features: [TypedArray]
---*/
testWithTypedArrayConstructors(function(TA) {
assert(
compareArray(new TA([0, 0, 0]).fill(8, 0, 1), [8, 0, 0]),
"Fill elements from custom end position"
);
assert(
compareArray(new TA([0, 0, 0]).fill(8, 0, -1), [8, 8, 0]),
"negative end sets final position to max((length + relativeEnd), 0)"
);
assert(
compareArray(new TA([0, 0, 0]).fill(8, 0, 5), [8, 8, 8]),
"end position is never higher than of length"
);
assert(
compareArray(new TA([0, 0, 0]).fill(8, 0, -4), [0, 0, 0]),
"end position is 0 when (len + relativeEnd) < 0"
);
});
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