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// |reftest| skip-if(!this.hasOwnProperty('AsyncIterator'))
//
//
/*---
esid: pending
description: Lazy %AsyncIterator.prototype% methods throw eagerly when called on non-iterators.
info: >
AsyncIterator Helpers proposal 1.1.1
features: [iterator-helpers]
---*/
async function* gen(x) { yield x; }
const methods = [
iter => AsyncIterator.prototype.map.bind(iter, x => x),
iter => AsyncIterator.prototype.filter.bind(iter, x => x),
iter => AsyncIterator.prototype.take.bind(iter, 1),
iter => AsyncIterator.prototype.drop.bind(iter, 0),
iter => AsyncIterator.prototype.asIndexedPairs.bind(iter),
iter => AsyncIterator.prototype.flatMap.bind(iter, gen),
];
for (const method of methods) {
for (const value of [undefined, null, 0, false, '', Symbol(''), {}, []]) {
assertThrowsInstanceOf(method(value), TypeError);
}
}
if (typeof reportCompare == 'function')
reportCompare(0, 0);
|
