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LibJS: Implement Temporal.Duration.prototype.subtract
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describe("correct behavior", () => {
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test("length is 1", () => {
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expect(Temporal.Duration.prototype.subtract).toHaveLength(1);
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});
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function checkCommonResults(durationResult) {
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expect(durationResult.years).toBe(0);
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expect(durationResult.months).toBe(0);
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expect(durationResult.weeks).toBe(0);
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expect(durationResult.days).toBe(1);
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expect(durationResult.hours).toBe(1);
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expect(durationResult.minutes).toBe(1);
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expect(durationResult.seconds).toBe(1);
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expect(durationResult.milliseconds).toBe(1);
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expect(durationResult.microseconds).toBe(1);
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expect(durationResult.nanoseconds).toBe(1);
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}
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test("basic functionality", () => {
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const duration = new Temporal.Duration(0, 0, 0, 2, 2, 2, 2, 2, 2, 2);
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const oneDuration = new Temporal.Duration(0, 0, 0, 1, 1, 1, 1, 1, 1, 1);
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const durationResult = duration.subtract(oneDuration);
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checkCommonResults(durationResult);
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});
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test("from duration-like", () => {
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const duration = new Temporal.Duration(0, 0, 0, 2, 2, 2, 2, 2, 2, 2);
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const oneDuration = {
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days: 1,
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hours: 1,
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minutes: 1,
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seconds: 1,
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milliseconds: 1,
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microseconds: 1,
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nanoseconds: 1,
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};
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const durationResult = duration.subtract(oneDuration);
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checkCommonResults(durationResult);
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});
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test("from string", () => {
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const duration = new Temporal.Duration(0, 0, 0, 2, 2, 2, 2, 2, 2, 2);
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const oneDuration = "P1DT1H1M1.001001001S";
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const durationResult = duration.subtract(oneDuration);
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checkCommonResults(durationResult);
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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.Duration object", () => {
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expect(() => {
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Temporal.Duration.prototype.subtract.call("foo");
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}).toThrowWithMessage(TypeError, "Not an object of type Temporal.Duration");
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});
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test("relativeTo is required when duration has calendar units", () => {
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const yearDuration = new Temporal.Duration(1);
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const monthDuration = new Temporal.Duration(0, 1);
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const weekDuration = new Temporal.Duration(0, 0, 1);
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const durationToSubtract = { seconds: 1 };
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expect(() => {
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yearDuration.subtract(durationToSubtract);
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}).toThrowWithMessage(
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RangeError,
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"A starting point is required for balancing year, month or week"
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);
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expect(() => {
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monthDuration.subtract(durationToSubtract);
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}).toThrowWithMessage(
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RangeError,
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"A starting point is required for balancing year, month or week"
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);
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expect(() => {
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weekDuration.subtract(durationToSubtract);
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}).toThrowWithMessage(
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RangeError,
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"A starting point is required for balancing year, month or week"
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);
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});
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});
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