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LibJS: Add Date.parse formats for the output of Date.prototype.to*String

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We currently cannot parse the output of `toString` and `toUTCString`.
While the spec does not require such support, test262 expects it, and
all major engines support it.
This commit is contained in:
Timothy Flynn 2023-11-07 11:16:03 -05:00 • committed by Andreas Kling
parent 9d3f942d43
commit bf3fce1766
3 changed files with 73 additions and 7 deletions
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64
Userland/Libraries/LibJS/Tests/builtins/Date/Date.parse.js
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@ -119,3 +119,67 @@ test("Month dd, yy hh:mm:ss extension", () => {
expectStringToGiveDate("May 30, 2023 17:00:00", 2023, 5, 30, 17, 0, 0);
expectStringToGiveDate("June 5, 2023 17:00:00", 2023, 6, 5, 17, 0, 0);
});
test("Date.prototype.toString extension", () => {
function expectStringToGiveDate(input, fullYear, month, dayInMonth, hours) {
const date = new Date(Date.parse(input));
expect(date.getFullYear()).toBe(fullYear);
expect(date.getMonth() + 1).toBe(month);
expect(date.getDate()).toBe(dayInMonth);
expect(date.getHours()).toBe(hours);
}
const time1 = "Tue Nov 07 2023 10:00:00 GMT-0500 (Eastern Standard Time)";
const time2 = "Tue Nov 07 2023 10:00:00 GMT+0100 (Central European Standard Time)";
const time3 = "Tue Nov 07 2023 10:00:00 GMT+0800 (Australian Western Standard Time)";
const originalTimeZone = setTimeZone("UTC");
expectStringToGiveDate(time1, 2023, 11, 7, 15);
expectStringToGiveDate(time2, 2023, 11, 7, 9);
expectStringToGiveDate(time3, 2023, 11, 7, 2);
setTimeZone("America/New_York");
expectStringToGiveDate(time1, 2023, 11, 7, 10);
expectStringToGiveDate(time2, 2023, 11, 7, 4);
expectStringToGiveDate(time3, 2023, 11, 6, 21);
setTimeZone("Australia/Perth");
expectStringToGiveDate(time1, 2023, 11, 7, 23);
expectStringToGiveDate(time2, 2023, 11, 7, 17);
expectStringToGiveDate(time3, 2023, 11, 7, 10);
// FIXME: Create a scoped time zone helper when bytecode supports the `using` declaration.
setTimeZone(originalTimeZone);
});
test("Date.prototype.toUTCString extension", () => {
function expectStringToGiveDate(input, fullYear, month, dayInMonth, hours) {
const date = new Date(Date.parse(input));
expect(date.getFullYear()).toBe(fullYear);
expect(date.getMonth() + 1).toBe(month);
expect(date.getDate()).toBe(dayInMonth);
expect(date.getHours()).toBe(hours);
}
const time = "Tue, 07 Nov 2023 15:00:00 GMT";
const originalTimeZone = setTimeZone("UTC");
expectStringToGiveDate(time, 2023, 11, 7, 15);
setTimeZone("America/New_York");
expectStringToGiveDate(time, 2023, 11, 7, 10);
setTimeZone("Australia/Perth");
expectStringToGiveDate(time, 2023, 11, 7, 23);
// FIXME: Create a scoped time zone helper when bytecode supports the `using` declaration.
setTimeZone(originalTimeZone);
});
test("Round trip Date.prototype.to*String", () => {
const epoch = new Date(0);
expect(Date.parse(epoch.toString())).toBe(epoch.valueOf());
expect(Date.parse(epoch.toISOString())).toBe(epoch.valueOf());
expect(Date.parse(epoch.toUTCString())).toBe(epoch.valueOf());
});