blob: b1bd426dd8fe31058667b4fc430221402ab23e69 (
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// |reftest| skip-if(!this.hasOwnProperty('AsyncIterator'))
//
//
/*---
esid: pending
description: Lazy %AsyncIterator.prototype% methods handle empty iterators.
info: >
Iterator Helpers proposal 2.1.6
features: [iterator-helpers]
---*/
class EmptyIterator extends AsyncIterator {
async next() {
return {done: true};
}
}
async function* gen() {}
const methods = [
iter => iter.map(x => x),
iter => iter.filter(x => x),
iter => iter.take(1),
iter => iter.drop(0),
iter => iter.asIndexedPairs(),
iter => iter.flatMap(x => gen()),
];
for (const method of methods) {
for (const iterator of [new EmptyIterator(), gen()]) {
method(iterator).next().then(
({done, value}) => {
assertEq(done, true);
assertEq(value, undefined);
}
);
}
}
if (typeof reportCompare == 'function')
reportCompare(0, 0);
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