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LibJS: Implement Temporal.Instant.prototype.add()
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8 changed files with 173 additions and 3 deletions
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describe("correct behavior", () => {
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test("length is 1", () => {
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expect(Temporal.Instant.prototype.add).toHaveLength(1);
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});
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test("basic functionality", () => {
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const instant = new Temporal.Instant(1625614921000000000n);
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const duration = new Temporal.Duration(0, 0, 0, 0, 1, 2, 3, 4, 5, 6);
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expect(instant.add(duration).epochNanoseconds).toBe(1625618644004005006n);
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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.Instant object", () => {
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expect(() => {
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Temporal.Instant.prototype.add.call("foo");
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}).toThrowWithMessage(TypeError, "Not a Temporal.Instant");
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});
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test("invalid nanoseconds value, positive", () => {
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const instant = new Temporal.Instant(8_640_000_000_000_000_000_000n);
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const duration = new Temporal.Duration(0, 0, 0, 0, 0, 0, 0, 0, 0, 1);
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expect(() => {
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instant.add(duration);
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}).toThrowWithMessage(
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RangeError,
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"Invalid epoch nanoseconds value, must be in range -86400 * 10^17 to 86400 * 10^17"
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);
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});
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test("invalid nanoseconds value, negative", () => {
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const instant = new Temporal.Instant(-8_640_000_000_000_000_000_000n);
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const duration = new Temporal.Duration(0, 0, 0, 0, 0, 0, 0, 0, 0, -1);
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expect(() => {
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instant.add(duration);
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}).toThrowWithMessage(
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RangeError,
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"Invalid epoch nanoseconds value, must be in range -86400 * 10^17 to 86400 * 10^17"
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);
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});
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test("disallowed fields", () => {
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const instant = new Temporal.Instant(1625614921000000000n);
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for (const [args, property] of [
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[[123, 0, 0, 0], "years"],
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[[0, 123, 0, 0], "months"],
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[[0, 0, 123, 0], "weeks"],
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[[0, 0, 0, 123], "days"],
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]) {
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const duration = new Temporal.Duration(...args);
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expect(() => {
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instant.add(duration);
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}).toThrowWithMessage(
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RangeError,
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`Invalid value for duration property '${property}': must be zero, got 123`
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);
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}
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});
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});
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