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|
// |reftest| skip-if(!this.hasOwnProperty('AsyncIterator'))
//
//
/*---
esid: pending
description: %AsyncIterator.prototype%.flatMap closes the iterator and throws when mapped isn't iterable.
info: >
Iterator Helpers proposal 2.1.6.7
1. Repeat,
...
h. Let innerIterator be GetIterator(mapped, async).
i. IfAbruptCloseAsyncIterator(innerIterator, iterated).
features: [iterator-helpers]
---*/
class NotIterable {
async next() {
return {done: true};
}
}
class InvalidIterable {
[Symbol.asyncIterator]() {
return {};
}
}
class TestIterator extends AsyncIterator {
async next() {
return {done: false, value: 0};
}
closed = false;
async return(value) {
this.closed = true;
return {done: true, value};
}
}
const nonIterables = [
new NotIterable(),
new InvalidIterable(),
undefined,
null,
0,
false,
Symbol(''),
0n,
{},
];
(async () => {
for (const value of nonIterables) {
const iter = new TestIterator();
const mapped = iter.flatMap(x => value);
assertEq(iter.closed, false);
console.log("here!");
try {
await mapped.next();
assertEq(true, false, 'Expected reject');
} catch (exc) {
assertEq(exc instanceof TypeError, true);
}
assertEq(iter.closed, true);
}
})();
if (typeof reportCompare == 'function')
reportCompare(0, 0);
|
