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LibJS: Implement Date.prototype.setUTCFullYear

This commit is contained in:
Timothy Flynn 2022-01-15 15:56:17 -05:00 committed by Andreas Kling
parent 51bc973ecc
commit 0d73da0328
3 changed files with 93 additions and 2 deletions

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describe("errors", () => {
test("called on non-Date object", () => {
expect(() => {
Date.prototype.setUTCFullYear();
}).toThrowWithMessage(TypeError, "Not an object of type Date");
});
test("called with non-numeric parameters", () => {
expect(() => {
new Date().setUTCFullYear(Symbol.hasInstance);
}).toThrowWithMessage(TypeError, "Cannot convert symbol to number");
expect(() => {
new Date().setUTCFullYear(1989, Symbol.hasInstance);
}).toThrowWithMessage(TypeError, "Cannot convert symbol to number");
expect(() => {
new Date().setUTCFullYear(1989, 0, Symbol.hasInstance);
}).toThrowWithMessage(TypeError, "Cannot convert symbol to number");
});
});
describe("correct behavior", () => {
const d = new Date(2000, 2, 1);
test("basic functionality", () => {
d.setUTCFullYear(1989);
expect(d.getUTCFullYear()).toBe(1989);
d.setUTCFullYear(1990, 1);
expect(d.getUTCFullYear()).toBe(1990);
expect(d.getUTCMonth()).toBe(1);
d.setUTCFullYear(1991, 2, 15);
expect(d.getUTCFullYear()).toBe(1991);
expect(d.getUTCMonth()).toBe(2);
expect(d.getUTCDate()).toBe(15);
d.setUTCFullYear("");
expect(d.getUTCFullYear()).toBe(0);
d.setUTCFullYear("a");
expect(d.getUTCFullYear()).toBe(NaN);
});
test("NaN", () => {
d.setUTCFullYear(NaN);
expect(d.getUTCFullYear()).toBeNaN();
});
test("time clip", () => {
d.setUTCFullYear(8.65e15);
expect(d.getUTCFullYear()).toBeNaN();
});
});