| // 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 ?.[Expression] |
| features: [optional-chaining] |
| flags: [async] |
| ---*/ |
| |
| async function checkAssertions() { |
| assert.sameValue(await [11]?.[0], 11); |
| assert.sameValue([22, 33]?.[await Promise.resolve(1)], 33); |
| assert.sameValue([44, await Promise.resolve(55)]?.[1], 55); |
| assert.sameValue(undefined?.[ |
| await Promise.reject(new Error('unreachable')) |
| ], undefined); |
| } |
| checkAssertions().then($DONE, $DONE); |
