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// |reftest| skip-if(!this.hasOwnProperty('Iterator'))
//
//
/*---
esid: pending
description: Lazy %Iterator.prototype% methods don't close the iterator if `.next` call throws.
info: >
Iterator Helpers proposal 2.1.5
features: [iterator-helpers]
---*/
class TestError extends Error {}
class TestIterator extends Iterator {
next() {
throw new TestError();
}
closed = false;
return() {
this.closed = true;
return {done: true};
}
}
const iterator = new TestIterator();
const methods = [
iter => iter.map(x => x),
iter => iter.filter(x => x),
iter => iter.take(1),
iter => iter.drop(0),
iter => iter.flatMap(x => [x]),
];
for (const method of methods) {
assertEq(iterator.closed, false);
assertThrowsInstanceOf(() => method(iterator).next(), TestError);
assertEq(iterator.closed, false);
}
if (typeof reportCompare == 'function')
reportCompare(0, 0);
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