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// |reftest| shell-option(--enable-iterator-helpers) skip-if(!this.hasOwnProperty('Iterator')||!xulRuntime.shell) -- iterator-helpers is not enabled unconditionally, requires shell-options
// Copyright (C) 2023 Michael Ficarra. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-iteratorprototype.reduce
description: >
Iterator.prototype.reduce reducer can return any ECMAScript language value
info: |
%Iterator.prototype%.reduce ( reducer )
features: [iterator-helpers]
flags: []
---*/
const values = [undefined, null, true, false, 0, -0, 1, NaN, Infinity, "string", Symbol(), 0n, {}, [], () => {}];
let iter = values[Symbol.iterator]();
let assertionCount = 0;
let initialValue = {};
let result = iter.reduce((memo, v, count) => {
if (count == 0) {
assert.sameValue(memo, initialValue);
} else {
assert.sameValue(memo, values[count - 1]);
}
++assertionCount;
return v;
}, initialValue);
assert.sameValue(result, values[values.length - 1]);
assert.sameValue(assertionCount, values.length);
reportCompare(0, 0);
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