| // Copyright (C) 2021 Igalia, S.L. All rights reserved. |
| // This code is governed by the BSD license found in the LICENSE file. |
| |
| /*--- |
| esid: sec-temporal.instant.prototype.tolocalestring |
| description: Verify that undefined options are handled correctly. |
| features: [BigInt, Temporal] |
| ---*/ |
| |
| const instant = new Temporal.Instant(957270896_987_650_000n); |
| const defaultFormatter = new Intl.DateTimeFormat('en', Object.create(null)); |
| const expected = defaultFormatter.format(instant); |
| |
| const actualExplicit = instant.toLocaleString('en', undefined); |
| assert.sameValue(actualExplicit, expected, "default locale is determined by Intl.DateTimeFormat"); |
| |
| const actualImplicit = instant.toLocaleString('en'); |
| assert.sameValue(actualImplicit, expected, "default locale is determined by Intl.DateTimeFormat"); |
