mirror of https://github.com/tc39/test262.git
25 lines
780 B
JavaScript
25 lines
780 B
JavaScript
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// 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 ?.[Expression]
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features: [optional-chaining]
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flags: [async]
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---*/
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async function checkAssertions() {
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assert.sameValue(await [11]?.[0], 11);
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assert.sameValue([22, 33]?.[await Promise.resolve(1)], 33);
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assert.sameValue([44, await Promise.resolve(55)]?.[1], 55);
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assert.sameValue(undefined?.[
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await Promise.reject(new Error('unreachable'))
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], undefined);
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}
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checkAssertions().then($DONE, $DONE);
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