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fix(date): compute %U and %W week numbers like strftime (#958)

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web-orbit12
2026-09-27 14:47:52 +08:00
committed by GitHub
parent a2cdfb8aef
commit 0587ca803f
2 changed files with 19 additions and 6 deletions
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src/util/strftime.spec.ts
+16
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@@ -140,6 +140,22 @@ describe('util/strftime', function () {
it('should format %W as week of year, starts with 1', function () {
expect(t(now, '%W')).toBe('01')
})
it('should format %U and %W as 00 before the first Sunday/Monday', function () {
// 2021-01-01 is a Friday
expect(t(new TestDate('2021-01-01 12:00:00'), '%U %W')).toBe('00 00')
expect(t(new TestDate('2021-01-03 12:00:00'), '%U %W')).toBe('01 00')
expect(t(new TestDate('2021-01-04 12:00:00'), '%U %W')).toBe('01 01')
})
it('should keep Sunday in the previous %W week', function () {
// 2000-01-02 is a Sunday
expect(t(new TestDate('2000-01-02 12:00:00'), '%W')).toBe('00')
expect(t(new TestDate('2000-01-09 12:00:00'), '%W')).toBe('01')
})
it('should format %U and %W when January 1st is the start day', function () {
// 2006-01-01 is a Sunday, 2007-01-01 is a Monday
expect(t(new TestDate('2006-07-05 12:00:00'), '%U %W')).toBe('27 27')
expect(t(new TestDate('2007-01-01 12:00:00'), '%U %W')).toBe('00 01')
})
})
describe('Time zone', () => {