| // Copyright 2019 the V8 project authors. All rights reserved. |
| // Copyright 2020-2021 Apple Inc. All rights reserved. |
| // Use of this source code is governed by a BSD-style license. |
| |
| function shouldBe(actual, expected) { |
| // Tolerate different space characters used by different ICU versions. |
| // Older ICU uses U+2009 Thin Space in ranges, whereas newer ICU uses |
| // regular old U+0020. Let's ignore these differences. |
| if (typeof actual === 'string') |
| actual = actual.replaceAll(' ', ' '); |
| |
| if (actual !== expected) |
| throw new Error('bad value: ' + actual); |
| } |
| |
| if ($vm.icuHeaderVersion() >= 67) { |
| let df = new Intl.DateTimeFormat("en"); |
| // A modern date |
| let d1 = new Date(2019, 3, 4); |
| let d2 = new Date(2019, 4, 5); |
| shouldBe(df.format(d1), df.formatRange(d1, d1)); |
| shouldBe(df.format(d2), df.formatRange(d2, d2)); |
| shouldBe(df.formatRange(d1, d2), "4/4/2019 – 5/5/2019"); |
| // An old date just before the Julian / Gregorian switch |
| let d3 = new Date(1582, 8, 13); |
| let d4 = new Date(1582, 9, 14); |
| shouldBe(df.format(d3), df.formatRange(d3, d3)); |
| shouldBe(df.format(d4), df.formatRange(d4, d4)); |
| shouldBe(df.formatRange(d3, d4), "9/13/1582 – 10/14/1582"); |
| // An older date |
| let d5 = new Date(1000, 0, 1); |
| let d6 = new Date(1001, 1, 2); |
| shouldBe(df.format(d5), df.formatRange(d5, d5)); |
| shouldBe(df.format(d6), df.formatRange(d6, d6)); |
| shouldBe(df.formatRange(d5, d6), "1/1/1000 – 2/2/1001"); |
| } |
