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// |reftest| skip-if(!this.hasOwnProperty('Iterator'))
//
//
/*---
esid: pending
description: %Iterator.prototype%.flatMap closes the iterator when innerValue throws.
info: >
Iterator Helpers proposal 2.1.5.7
1. Repeat,
...
i. Repeat, while innerAlive is true,
...
vi. Else,
1. Let innerValue be IteratorValue(innerNext).
2. IfAbruptCloseIterator(innerValue, iterated).
features: [iterator-helpers]
---*/
class TestIterator extends Iterator {
next() {
return {done: false, value: 0};
}
closed = false;
return() {
this.closed = true;
return {done: true};
}
}
class TestError extends Error {}
class InnerIterator extends Iterator {
next() {
return {
done: false,
get value() {
throw new TestError();
},
};
}
}
const iter = new TestIterator();
const mapped = iter.flatMap(x => new InnerIterator());
assertEq(iter.closed, false);
assertThrowsInstanceOf(() => mapped.next(), TestError);
assertEq(iter.closed, true);
if (typeof reportCompare == 'function')
reportCompare(0, 0);
|
