mirror of https://github.com/tc39/test262.git
37 lines
874 B
JavaScript
37 lines
874 B
JavaScript
// Copyright 2019 Google, LLC. All rights reserved.
|
|
// This code is governed by the BSD license found in the LICENSE file.
|
|
/*---
|
|
esid: prod-OptionalExpression
|
|
description: >
|
|
optional chain RHS of for await statement
|
|
info: |
|
|
IterationStatement
|
|
for await (LeftHandSideExpression of AssignmentExpression) Statement
|
|
features: [optional-chaining]
|
|
flags: [async]
|
|
includes: [asyncHelpers.js]
|
|
---*/
|
|
const obj = {
|
|
iterable: {
|
|
[Symbol.asyncIterator]() {
|
|
return {
|
|
i: 0,
|
|
next() {
|
|
if (this.i < 3) {
|
|
return Promise.resolve({ value: this.i++, done: false });
|
|
}
|
|
return Promise.resolve({ done: true });
|
|
}
|
|
};
|
|
}
|
|
}
|
|
};
|
|
async function checkAssertions() {
|
|
let count = 0;
|
|
for await (const num of obj?.iterable) {
|
|
count += num;
|
|
}
|
|
assert.sameValue(3, count);
|
|
}
|
|
asyncTest(checkAssertions);
|