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LibJS: Implement Temporal.PlainYearMonth.prototype.monthsInYear
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describe("correct behavior", () => {
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test("basic functionality", () => {
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const plainYearMonth = new Temporal.PlainYearMonth(2021, 7);
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expect(plainYearMonth.monthsInYear).toBe(12);
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});
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});
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describe("errors", () => {
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test("this value must be a Temporal.PlainYearMonth object", () => {
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expect(() => {
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Reflect.get(Temporal.PlainYearMonth.prototype, "monthsInYear", "foo");
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}).toThrowWithMessage(TypeError, "Not a Temporal.PlainYearMonth");
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});
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});
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