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LibJS+LibUnicode: Generate a set of default DateTimeFormat patterns

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This isn't called out in TR-35, but before ICU even looks at CLDR data,
it adds a hard-coded set of default patterns to each locale's calendar.
It has done this since 2006 when its DateTimeFormat feature was first
created. Several test262 tests depend on this, which under ECMA-402,
falls into "implementation defined" behavior. For compatibility, we
can do the same in LibUnicode.
This commit is contained in:
Timothy Flynn 2022-07-22 18:00:06 -04:00 • committed by Linus Groh
parent 8150d71821
commit ae2acc8cdf
3 changed files with 56 additions and 2 deletions
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40
Userland/Libraries/LibJS/Tests/builtins/Intl/DateTimeFormat/DateTimeFormat.prototype.format.js
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@ -263,7 +263,11 @@ describe("dayPeriod", () => {
});
test("flexible day period rolls over midnight", () => {
const en = new Intl.DateTimeFormat("en", { dayPeriod: "short", timeZone: "UTC" });
const en = new Intl.DateTimeFormat("en", {
hour: "numeric",
dayPeriod: "short",
timeZone: "UTC",
});
// For the en locale, these times (05:00 and 23:00) fall in the flexible day period range of
// [21:00, 06:00), on either side of midnight.
@ -291,6 +295,7 @@ describe("dayPeriod", () => {
// The en locale includes the "noon" fixed day period, whereas the ar locale does not.
data.forEach(d => {
const en = new Intl.DateTimeFormat("en", {
hour: "numeric",
dayPeriod: "short",
timeZone: "UTC",
minute: d.minute,
@ -303,6 +308,7 @@ describe("dayPeriod", () => {
expect(en.format(date3)).toBe(d.en3);
const ar = new Intl.DateTimeFormat("ar", {
hour: "numeric",
dayPeriod: "short",
timeZone: "UTC",
minute: d.minute,
@ -315,6 +321,38 @@ describe("dayPeriod", () => {
expect(ar.format(date3)).toBe(d.ar3);
});
});
test("dayPeriod without time", () => {
// prettier-ignore
const data = [
{ dayPeriod: "narrow", en0: "in the afternoon", en1: "in the morning", ar0: "بعد الظهر", ar1: "صباحًا", as0: "অপৰাহ্ন", as1: "পূৰ্বাহ্ন"},
{ dayPeriod: "short", en0: "in the afternoon", en1: "in the morning", ar0: "بعد الظهر", ar1: "ص", as0: "অপৰাহ্ন", as1: "পূৰ্বাহ্ন"},
{ dayPeriod: "long", en0: "in the afternoon", en1: "in the morning", ar0: "بعد الظهر", ar1: "صباحًا", as0: "অপৰাহ্ন", as1: "পূৰ্বাহ্ন"},
];
data.forEach(d => {
const en = new Intl.DateTimeFormat("en", {
dayPeriod: d.dayPeriod,
timeZone: "UTC",
});
expect(en.format(d0)).toBe(d.en0);
expect(en.format(d1)).toBe(d.en1);
const ar = new Intl.DateTimeFormat("ar", {
dayPeriod: d.dayPeriod,
timeZone: "UTC",
});
expect(ar.format(d0)).toBe(d.ar0);
expect(ar.format(d1)).toBe(d.ar1);
const as = new Intl.DateTimeFormat("as", {
dayPeriod: d.dayPeriod,
timeZone: "UTC",
});
expect(as.format(d0)).toBe(d.as0);
expect(as.format(d1)).toBe(d.as1);
});
});
});
describe("hour", () => {