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// |reftest| skip-if(!this.hasOwnProperty('Iterator'))
//
//
/*---
esid: pending
description: Lazy %Iterator.prototype% methods close the iterator if callback throws.
info: >
Iterator Helpers proposal 2.1.5
features: [iterator-helpers]
---*/
class TestError extends Error {}
class TestIterator extends Iterator {
next() {
return {done: false, value: 1};
}
closed = false;
return() {
this.closed = true;
return {done: true};
}
}
function fn() {
throw new TestError();
}
const methods = [
iter => iter.map(fn),
iter => iter.filter(fn),
iter => iter.flatMap(fn),
];
for (const method of methods) {
const iter = new TestIterator();
assertEq(iter.closed, false);
assertThrowsInstanceOf(() => method(iter).next(), TestError);
assertEq(iter.closed, true);
}
if (typeof reportCompare == 'function')
reportCompare(0, 0);