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LibJS: Only allow TimeZone this value in TimeZone#getPlainDateTimeFor

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This is a normative change in the Temporal spec.

See: 2644fc6
This commit is contained in:
Luke Wilde 2021-12-18 23:17:09 +00:00 • committed by Linus Groh
parent 7729598b5b
commit cf5f08b317
2 changed files with 15 additions and 28 deletions
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34
Userland/Libraries/LibJS/Tests/builtins/Temporal/TimeZone/TimeZone.prototype.getPlainDateTimeFor.js
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@ -26,35 +26,21 @@ describe("correct behavior", () => {
const plainDateTime = timeZone.getPlainDateTimeFor(instant, calendar);
expect(plainDateTime.calendar).toBe(calendar);
});
test("non-TimeZone this value", () => {
const timeZoneLike = {
getOffsetNanosecondsFor() {
return 123;
},
};
const instant = new Temporal.Instant(0n);
const plainDateTime = Temporal.TimeZone.prototype.getPlainDateTimeFor.call(
timeZoneLike,
instant
);
expect(plainDateTime.year).toBe(1970);
expect(plainDateTime.month).toBe(1);
expect(plainDateTime.day).toBe(1);
expect(plainDateTime.hour).toBe(0);
expect(plainDateTime.minute).toBe(0);
expect(plainDateTime.second).toBe(0);
expect(plainDateTime.millisecond).toBe(0);
expect(plainDateTime.microsecond).toBe(0);
expect(plainDateTime.nanosecond).toBe(123);
});
});
describe("errors", () => {
test("custom time zone doesn't have a getOffsetNanosecondsFor function", () => {
test("time zone doesn't have a getOffsetNanosecondsFor function", () => {
const timeZone = new Temporal.TimeZone("UTC");
timeZone.getOffsetNanosecondsFor = undefined;
const instant = new Temporal.Instant(1n);
expect(() => {
Temporal.TimeZone.prototype.getPlainDateTimeFor.call({}, instant);
timeZone.getPlainDateTimeFor(instant);
}).toThrowWithMessage(TypeError, "null is not a function");
});
test("this value must be a Temporal.TimeZone object", () => {
expect(() => {
Temporal.TimeZone.prototype.getPlainDateTimeFor.call("foo");
}).toThrowWithMessage(TypeError, "Not an object of type Temporal.TimeZone");
});
});