mirror of https://github.com/tc39/test262.git
30 lines
964 B
JavaScript
30 lines
964 B
JavaScript
// Copyright (C) 2023 Michael Ficarra. All rights reserved.
|
|
// This code is governed by the BSD license found in the LICENSE file.
|
|
/*---
|
|
esid: sec-iterator.from
|
|
description: >
|
|
The value of the [[Prototype]] internal slot of the return value of Iterator.from is the
|
|
intrinsic object %WrapForValidIteratorPrototype%, whose [[Prototype]] is %IteratorHelperPrototype%.
|
|
features: [iterator-helpers]
|
|
---*/
|
|
let iter = {
|
|
next() {
|
|
return {
|
|
done: true,
|
|
value: undefined,
|
|
};
|
|
},
|
|
};
|
|
|
|
const WrapForValidIteratorPrototype = Object.getPrototypeOf(Iterator.from(iter));
|
|
|
|
assert.sameValue(Object.getPrototypeOf(WrapForValidIteratorPrototype), Iterator.prototype);
|
|
|
|
class SubIterator extends Iterator {}
|
|
assert.sameValue(Object.getPrototypeOf(SubIterator.from(iter)), WrapForValidIteratorPrototype);
|
|
|
|
function* g() {}
|
|
const GeneratorPrototype = Object.getPrototypeOf(g());
|
|
|
|
assert.sameValue(Object.getPrototypeOf(Iterator.from(g())), GeneratorPrototype);
|