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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.flatMap
description: >
Mapper returned iterator return is called when result iterator is closed
info: |
%Iterator.prototype%.flatMap ( mapper )
features: [iterator-helpers]
flags: []
---*/
let returnCount = 0;
function* g() {
yield 0;
}
let iter = g().flatMap(v => ({
next() {
return {
done: false,
value: 1,
};
},
return() {
++returnCount;
return {};
},
}));
assert.sameValue(returnCount, 0);
let { done, value } = iter.next();
assert.sameValue(done, false);
assert.sameValue(value, 1);
assert.sameValue(returnCount, 0);
iter.return();
assert.sameValue(returnCount, 1);
iter.return();
assert.sameValue(returnCount, 1);
reportCompare(0, 0);
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