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// |reftest| async
// Copyright 2019 Google, Inc. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: prod-OptionalExpression
description: >
optional chain expansions in an async context
info: |
Left-Hand-Side Expressions
OptionalExpression
MemberExpression [PrimaryExpression Identifier] OptionalChain
OptionalChain OptionalChain ?.[Expression]
features: [optional-chaining]
flags: [async]
includes: [asyncHelpers.js]
---*/
async function checkAssertions() {
assert.sameValue(await {a: [11]}?.a[0], 11);
const b = {c: [22, 33]};
assert.sameValue(b?.c[await Promise.resolve(1)], 33);
function e(val) {
return val;
}
assert.sameValue({d: e}?.d(await Promise.resolve([44, 55]))[1], 55);
assert.sameValue(undefined?.arr[
await Promise.reject(new Error('unreachable'))
], undefined);
}
asyncTest(checkAssertions);