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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.reduceright
description: >
callbackfn arguments using default accumulator (value at last index)
info: |
22.2.3.21 %TypedArray%.prototype.reduceRight ( callbackfn [ , initialValue ] )
%TypedArray%.prototype.reduceRight is a distinct function that implements the
same algorithm as Array.prototype.reduceRight as defined in 22.1.3.20 except
that the this object's [[ArrayLength]] internal slot is accessed in place of
performing a [[Get]] of "length".
22.1.3.20 Array.prototype.reduceRight ( callbackfn [ , initialValue ] )
...
7. Else initialValue is not present,
...
b. Repeat, while kPresent is false and k ≥ 0
...
ii. Let kPresent be ? HasProperty(O, Pk).
iii. If kPresent is true, then
1. Let accumulator be ? Get(O, Pk).
iv. Decrease k by 1.
...
8. Repeat, while k ≥ 0
...
c. If kPresent is true, then
i. Let kValue be ? Get(O, Pk).
ii. Let accumulator be ? Call(callbackfn, undefined, « accumulator,
kValue, k, O »).
d. Decrease k by 1.
...
includes: [testBigIntTypedArray.js]
features: [BigInt, TypedArray]
---*/
testWithBigIntTypedArrayConstructors(function(TA) {
var sample = new TA([42n, 43n, 44n]);
var results = [];
sample.reduceRight(function(accumulator) {
results.push(arguments);
return accumulator + 1n;
});
assert.sameValue(results.length, 2, "results.length");
assert.sameValue(results[0].length, 4, "results[1].length");
assert.sameValue(results[0][0], 44n, "results[1][0] - accumulator");
assert.sameValue(results[0][1], 43n, "results[1][1] - kValue");
assert.sameValue(results[0][2], 1, "results[1][2] - k");
assert.sameValue(results[0][3], sample, "results[1][3] - this");
assert.sameValue(results[1].length, 4, "results[2].length");
assert.sameValue(results[1][0], 45n, "results[2][0] - accumulator");
assert.sameValue(results[1][1], 42n, "results[2][1] - kValue");
assert.sameValue(results[1][2], 0, "results[2][2] - k");
assert.sameValue(results[1][3], sample, "results[2][3] - this");
});
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