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LibJS/Tests: Fix Temporal.Now.plainDate{,ISO}() at end of month/year

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Evidently, going one day forward on the last day of month increases the
month number by one and resets the day to 1. Doing the same on the last
day of the year resets the month to 1.
This commit is contained in:
Linus Groh 2021-07-31 13:52:29 +01:00
parent 57e2a38de0
commit cab1015a03
2 changed files with 28 additions and 8 deletions
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18
Userland/Libraries/LibJS/Tests/builtins/Temporal/Now/Now.plainDate.js
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@ -19,9 +19,19 @@ describe("correct behavior", () => {
};
const plainDate = Temporal.Now.plainDate(calendar);
const plainDateWithOffset = Temporal.Now.plainDate(calendar, timeZone);
// Yes, this will fail if a day, month, or year change happens between the above two lines :^)
expect(plainDateWithOffset.year).toBe(plainDate.year);
expect(plainDateWithOffset.month).toBe(plainDate.month);
expect(plainDateWithOffset.day).toBe(plainDate.day + 1);
if (plainDate.dayOfYear === plainDate.daysInYear) {
expect(plainDateWithOffset.year).toBe(plainDate.year + 1);
expect(plainDateWithOffset.month).toBe(1);
expect(plainDateWithOffset.day).toBe(1);
} else {
expect(plainDateWithOffset.year).toBe(plainDate.year);
if (plainDate.day === plainDate.daysInMonth) {
expect(plainDateWithOffset.month).toBe(plainDate.month + 1);
expect(plainDateWithOffset.day).toBe(1);
} else {
expect(plainDateWithOffset.month).toBe(plainDate.month);
expect(plainDateWithOffset.day).toBe(plainDate.day + 1);
}
}
});
});