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// |reftest| skip-if(!this.hasOwnProperty('AsyncIterator'))
//
//
/*---
esid: pending
description: %AsyncIterator.prototype%.flatMap skips empty inner iterables.
info: >
Iterator Helpers proposal 2.1.6.7
1. Repeat,
...
k. Repeat, while innerAlive is true,
...
v. Let innerComplete be IteratorComplete(innerNext).
...
vii. If innerComplete is true, set innerAlive to false.
features: [iterator-helpers]
---*/
async function* gen(values) {
yield* values;
}
(async () => {
let iter = gen([0, 1, 2, 3]).flatMap(x => x % 2 ? gen([]) : gen([x]));
for (const expected of [0, 2]) {
const result = await iter.next();
assertEq(result.value, expected);
assertEq(result.done, false);
}
let result = await iter.next();
assertEq(result.value, undefined);
assertEq(result.done, true);
iter = gen([0, 1, 2, 3]).flatMap(x => gen([]));
result = await iter.next();
assertEq(result.value, undefined);
assertEq(result.done, true);
})();
if (typeof reportCompare == 'function')
reportCompare(0, 0);
|
