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test: add test for week number with different first day of week setting

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Jin 2026-02-01 14:25:51 +00:00
parent bd7e47d8f0
commit 7fd2bc30cc
1 changed files with 45 additions and 0 deletions
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45
packages/commons/src/lib/week_utils.spec.ts
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@ -38,6 +38,51 @@ describe("week_utils", () => {
expect(result.weekYear).toBe(2026);
expect(result.weekNumber).toBe(2);
});
it("2026-02-01 (Sunday) should be 2026-W05 (still in week 5)", () => {
// Feb 1, 2026 is Sunday - with Monday as first day, this is the last day of week 5
// Week 5 starts on 2026-01-26 (Mon) and ends on 2026-02-01 (Sun)
const result = getWeekInfo(dayjs("2026-02-01"), settings);
expect(result.weekYear).toBe(2026);
expect(result.weekNumber).toBe(5);
});
it("2026-02-02 (Monday) should be 2026-W06 (start of week 6)", () => {
// Feb 2, 2026 is Monday - start of week 6
const result = getWeekInfo(dayjs("2026-02-02"), settings);
expect(result.weekYear).toBe(2026);
expect(result.weekNumber).toBe(6);
});
});
describe("with firstDayOfWeek=7 (Sunday as first day)", () => {
const settings: WeekSettings = {
firstDayOfWeek: 7, // Sunday
firstWeekOfYear: 0,
minDaysInFirstWeek: 4
};
it("2026-02-01 (Sunday) should be 2026-W06 (start of new week)", () => {
// Feb 1, 2026 is Sunday - should be the START of week 6, not end of week 5
const result = getWeekInfo(dayjs("2026-02-01"), settings);
expect(result.weekYear).toBe(2026);
expect(result.weekNumber).toBe(6);
});
it("2026-01-31 (Saturday) should be 2026-W05 (last day of week 5)", () => {
// Jan 31, 2026 is Saturday - should be the last day of week 5
const result = getWeekInfo(dayjs("2026-01-31"), settings);
expect(result.weekYear).toBe(2026);
expect(result.weekNumber).toBe(5);
});
it("2026-01-25 (Sunday) should be 2026-W05 (start of week 5)", () => {
// Jan 25, 2026 is Sunday - week 5 starts here
const result = getWeekInfo(dayjs("2026-01-25"), settings);
expect(result.weekYear).toBe(2026);
expect(result.weekNumber).toBe(5);
});
});
describe("with firstWeekOfYear=1 (ISO standard, first week contains first Thursday)", () => {