mirror of https://github.com/tc39/test262.git
30 lines
891 B
JavaScript
30 lines
891 B
JavaScript
// Copyright 2019 Google, Inc. All rights reserved.
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// This code is governed by the BSD license found in the LICENSE file.
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/*---
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esid: prod-OptionalExpression
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description: >
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optional chain expansions in an async context
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info: |
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Left-Hand-Side Expressions
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OptionalExpression
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MemberExpression [PrimaryExpression Identifier] OptionalChain
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OptionalChain OptionalChain ?.[Expression]
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features: [optional-chaining]
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flags: [async]
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includes: [asyncHelpers.js]
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---*/
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async function checkAssertions() {
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assert.sameValue(await {a: [11]}?.a[0], 11);
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const b = {c: [22, 33]};
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assert.sameValue(b?.c[await Promise.resolve(1)], 33);
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function e(val) {
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return val;
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}
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assert.sameValue({d: e}?.d(await Promise.resolve([44, 55]))[1], 55);
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assert.sameValue(undefined?.arr[
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await Promise.reject(new Error('unreachable'))
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], undefined);
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}
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asyncTest(checkAssertions);
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