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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.map
description: >
Underlying iterator is advanced after calling map
info: |
%Iterator.prototype%.map ( mapper )
features: [iterator-helpers]
flags: []
---*/
let iterator = (function* () {
for (let i = 0; i < 5; ++i) {
yield i;
}
})();
let mapped = iterator.map(x => x);
let { value, done } = iterator.next();
assert.sameValue(value, 0);
assert.sameValue(done, false);
iterator.next();
iterator.next();
({ value, done } = mapped.next());
assert.sameValue(value, 3);
assert.sameValue(done, false);
({ value, done } = mapped.next());
assert.sameValue(value, 4);
assert.sameValue(done, false);
({ value, done } = mapped.next());
assert.sameValue(value, undefined);
assert.sameValue(done, true);
reportCompare(0, 0);
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