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// |reftest| skip-if(!this.hasOwnProperty('Iterator'))
//
//
/*---
esid: pending
description: Calling `.return()` on a lazy %Iterator.prototype% method closes the source iterator.
info: >
Iterator Helpers proposal 2.1.5
features: [iterator-helpers]
---*/
class TestIterator extends Iterator {
next() {
return {done: false, value: 1};
}
closed = false;
return(value) {
this.closed = true;
return {done: true, value};
}
}
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) {
const iter = new TestIterator();
const iterHelper = method(iter);
iterHelper.next();
assertEq(iter.closed, false);
const result = iterHelper.return("ignored");
assertEq(iter.closed, true);
assertEq(result.done, true);
assertEq(result.value, undefined);
}
for (const method of methods) {
const iter = new TestIterator();
const iterHelper = method(iter);
assertEq(iter.closed, false);
const result = iterHelper.return("ignored");
assertEq(iter.closed, true);
assertEq(result.done, true);
assertEq(result.value, undefined);
}
if (typeof reportCompare == 'function')
reportCompare(0, 0);