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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
es6id: 22.2.3.8
description: >
Fills elements from coerced to Integer `start` and `end` values
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 ] ] )
...
3. Let relativeStart be ? ToInteger(start).
4. If relativeStart < 0, let k be max((len + relativeStart), 0); else let k be
min(relativeStart, len).
5. If end is undefined, let relativeEnd be len; else let relativeEnd be ?
ToInteger(end).
...
includes: [compareArray.js, testTypedArray.js]
---*/
testWithTypedArrayConstructors(function(TA, N) {
assert(
compareArray(new TA(N([0, 0])).fill(N(1), undefined), N([1, 1])),
'`undefined` start coerced to 0'
);
assert(
compareArray(new TA(N([0, 0])).fill(N(1), 0, undefined), N([1, 1])),
'If end is undefined, let relativeEnd be len'
);
assert(
compareArray(new TA(N([0, 0])).fill(N(1), null), N([1, 1])),
'`null` start coerced to 0'
);
assert(
compareArray(new TA(N([0, 0])).fill(N(1), 0, null), N([0, 0])),
'`null` end coerced to 0'
);
assert(
compareArray(new TA(N([0, 0])).fill(N(1), true), N([0, 1])),
'`true` start coerced to 1'
);
assert(
compareArray(new TA(N([0, 0])).fill(N(1), 0, true), N([1, 0])),
'`true` end coerced to 1'
);
assert(
compareArray(new TA(N([0, 0])).fill(N(1), false), N([1, 1])),
'`false` start coerced to 0'
);
assert(
compareArray(new TA(N([0, 0])).fill(N(1), 0, false), N([0, 0])),
'`false` end coerced to 0'
);
assert(
compareArray(new TA(N([0, 0])).fill(N(1), NaN), N([1, 1])),
'`NaN` start coerced to 0'
);
assert(
compareArray(new TA(N([0, 0])).fill(N(1), 0, NaN), N([0, 0])),
'`NaN` end coerced to 0'
);
assert(
compareArray(new TA(N([0, 0])).fill(N(1), '1'), N([0, 1])),
'string start coerced'
);
assert(
compareArray(new TA(N([0, 0])).fill(N(1), 0, '1'), N([1, 0])),
'string end coerced'
);
assert(
compareArray(new TA(N([0, 0])).fill(N(1), 1.5), N([0, 1])),
'start as a float number coerced'
);
assert(
compareArray(new TA(N([0, 0])).fill(N(1), 0, 1.5), N([1, 0])),
'end as a float number coerced'
);
});
|
