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LibJS: Implement ECMA-402 Date.prototype.toLocaleTimeString

This commit is contained in:
Timothy Flynn 2021-12-09 22:57:25 -05:00 committed by Linus Groh
parent 4d310fd7aa
commit 2e4e0195de
2 changed files with 81 additions and 6 deletions

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describe("errors", () => {
test("called on non-Date object", () => {
expect(() => {
Date.prototype.toLocaleTimeString();
}).toThrowWithMessage(TypeError, "Not an object of type Date");
});
test("called with value that cannot be converted to a number", () => {
expect(() => {
new Date(Symbol.hasInstance).toLocaleTimeString();
}).toThrowWithMessage(TypeError, "Cannot convert symbol to number");
expect(() => {
new Date(1n).toLocaleTimeString();
}).toThrowWithMessage(TypeError, "Cannot convert BigInt to number");
});
test("time value cannot be clipped", () => {
expect(() => {
new Date(-8.65e15).toLocaleTimeString();
}).toThrowWithMessage(RangeError, "Time value must be between -8.64E15 and 8.64E15");
});
test("dateStyle may not be specified", () => {
expect(() => {
new Date().toLocaleTimeString([], { dateStyle: "short" });
}).toThrowWithMessage(TypeError, "Option dateStyle cannot be set when also providing time");
});
});
describe("correct behavior", () => {
test("NaN", () => {
const d = new Date(NaN);
expect(d.toLocaleTimeString()).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 time", () => {
expect(d0.toLocaleTimeString("en", { timeZone: "UTC" })).toBe("5:40:50 PM");
expect(d1.toLocaleTimeString("en", { timeZone: "UTC" })).toBe("7:08:09 AM");
expect(d0.toLocaleTimeString("ar", { timeZone: "UTC" })).toBe("٥:٤٠:٥٠ م");
expect(d1.toLocaleTimeString("ar", { timeZone: "UTC" })).toBe("٧:٠٨:٠٩ ص");
});
test("timeStyle may be set", () => {
expect(d0.toLocaleTimeString("en", { timeStyle: "long", timeZone: "UTC" })).toBe(
"5:40:50 PM UTC"
);
expect(d1.toLocaleTimeString("en", { timeStyle: "long", timeZone: "UTC" })).toBe(
"7:08:09 AM UTC"
);
expect(d0.toLocaleTimeString("ar", { timeStyle: "long", timeZone: "UTC" })).toBe(
"٥:٤٠:٥٠ م UTC"
);
expect(d1.toLocaleTimeString("ar", { timeStyle: "long", timeZone: "UTC" })).toBe(
"٧:٠٨:٠٩ ص UTC"
);
});
});