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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(convertToBigInt([42, 43, 44]));
+
+ var results = [];
+
+ sample.reduceRight(function(accumulator) {
+ results.push(arguments);
+ return accumulator + convertToBigInt(1);
+ });
+
+ assert.sameValue(results.length, 2, "results.length");
+
+ assert.sameValue(results[0].length, 4, "results[1].length");
+ assert.sameValue(results[0][0], convertToBigInt(44), "results[1][0] - accumulator");
+ assert.sameValue(results[0][1], convertToBigInt(43), "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], convertToBigInt(45), "results[2][0] - accumulator");
+ assert.sameValue(results[1][1], convertToBigInt(42), "results[2][1] - kValue");
+ assert.sameValue(results[1][2], 0, "results[2][2] - k");
+ assert.sameValue(results[1][3], sample, "results[2][3] - this");
+});