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// |reftest| skip-if(!this.hasOwnProperty('AsyncIterator'))
//
//
/*---
esid: pending
description: Lazy %AsyncIterator.prototype% methods don't close the iterator if `next` returns rejected promise.
info: >
AsyncIterator Helpers proposal 2.1.6
features: [iterator-helpers]
---*/
class TestIterator extends AsyncIterator {
next() {
return Promise.reject('rejection');
}
closed = false;
async return(value) {
this.closed = true;
return {done: true, value};
}
}
async function* gen(x) { yield x; }
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(gen),
];
for (const method of methods) {
const iterator = new TestIterator();
assertEq(iterator.closed, false);
method(iterator).next().then(
_ => assertEq(true, false, 'Expected reject'),
err => {
assertEq(err, 'rejection');
assertEq(iterator.closed, false);
},
);
}
if (typeof reportCompare == 'function')
reportCompare(0, 0);
|
