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LibJS: Implement Temporal.PlainDate.prototype.add()
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describe("correct behavior", () => {
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test("length is 1", () => {
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expect(Temporal.PlainDate.prototype.add).toHaveLength(1);
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});
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test("basic functionality", () => {
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const plainDate = new Temporal.PlainDate(1970, 1, 1);
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const result = plainDate.add(new Temporal.Duration(51, 6, 0, 5));
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expect(result.equals(new Temporal.PlainDate(2021, 7, 6))).toBeTrue();
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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.PlainDate object", () => {
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expect(() => {
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Temporal.PlainDate.prototype.add.call("foo");
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}).toThrowWithMessage(TypeError, "Not an object of type Temporal.PlainDate");
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});
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});
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