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LibJS: Implement ECMA-402 Date.prototype.toLocaleString

This commit is contained in:
Timothy Flynn 2021-12-09 22:46:08 -05:00 committed by Linus Groh
parent 9be409585c
commit 9a62c01ebc
2 changed files with 93 additions and 6 deletions

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describe("errors", () => {
test("called on non-Date object", () => {
expect(() => {
Date.prototype.toLocaleString();
}).toThrowWithMessage(TypeError, "Not an object of type Date");
});
test("called with value that cannot be converted to a number", () => {
expect(() => {
new Date(Symbol.hasInstance).toLocaleString();
}).toThrowWithMessage(TypeError, "Cannot convert symbol to number");
expect(() => {
new Date(1n).toLocaleString();
}).toThrowWithMessage(TypeError, "Cannot convert BigInt to number");
});
test("time value cannot be clipped", () => {
expect(() => {
new Date(-8.65e15).toLocaleString();
}).toThrowWithMessage(RangeError, "Time value must be between -8.64E15 and 8.64E15");
});
});
describe("correct behavior", () => {
test("NaN", () => {
const d = new Date(NaN);
expect(d.toLocaleString()).toBe("Invalid Date");
});
const d0 = new Date(Date.UTC(2021, 11, 7, 17, 40, 50, 456));
const d1 = new Date(Date.UTC(1989, 0, 23, 7, 8, 9, 45));
test("defaults to date and time", () => {
expect(d0.toLocaleString("en", { timeZone: "UTC" })).toBe("12/7/2021, 5:40:50 PM");
expect(d1.toLocaleString("en", { timeZone: "UTC" })).toBe("1/23/1989, 7:08:09 AM");
expect(d0.toLocaleString("ar", { timeZone: "UTC" })).toBe("٧/١٢‏/٢٠٢١, ٥:٤٠:٥٠ م");
expect(d1.toLocaleString("ar", { timeZone: "UTC" })).toBe("٢٣‏/١/١٩٨٩, ٧:٠٨:٠٩ ص");
});
test("dateStyle may be set", () => {
expect(d0.toLocaleString("en", { dateStyle: "short", timeZone: "UTC" })).toBe("12/7/21");
expect(d1.toLocaleString("en", { dateStyle: "short", timeZone: "UTC" })).toBe("1/23/89");
expect(d0.toLocaleString("ar", { dateStyle: "short", timeZone: "UTC" })).toBe(
"٧/١٢‏/٢٠٢١"
);
expect(d1.toLocaleString("ar", { dateStyle: "short", timeZone: "UTC" })).toBe(
"٢٣‏/١/١٩٨٩"
);
});
test("timeStyle may be set", () => {
expect(d0.toLocaleString("en", { timeStyle: "short", timeZone: "UTC" })).toBe("5:40 PM");
expect(d1.toLocaleString("en", { timeStyle: "short", timeZone: "UTC" })).toBe("7:08 AM");
expect(d0.toLocaleString("ar", { timeStyle: "short", timeZone: "UTC" })).toBe("٥:٤٠ م");
expect(d1.toLocaleString("ar", { timeStyle: "short", timeZone: "UTC" })).toBe("٧:٠٨ ص");
});
});