LibJS: Implement Temporal.PlainDate.prototype.since

Userland/Libraries/LibJS/Tests/builtins/Temporal/PlainDate/PlainDate.prototype.since.js

@@ -0,0 +1,267 @@
+describe("correct behavior", () => {
+    test("length is 1", () => {
+        expect(Temporal.PlainDate.prototype.since).toHaveLength(1);
+    });
+
+    // FIXME: All the checks for years, months, weeks and days have to check for -0 instead of 0.
+    //        This is because CreateTemporalDuration in the spec doesn't convert -0 to 0 unlike the polyfill or what
+    //        the test262 tests expect.
+    //        Once this has been fixed in the spec, change the -0 checks for these properties to be just 0.
+
+    test("basic functionality", () => {
+        const dateOne = new Temporal.PlainDate(2021, 11, 14);
+        const dateTwo = new Temporal.PlainDate(2022, 12, 25);
+        const sinceDuration = dateTwo.since(dateOne);
+
+        expect(sinceDuration.years).toBe(-0);
+        expect(sinceDuration.months).toBe(-0);
+        expect(sinceDuration.weeks).toBe(-0);
+        expect(sinceDuration.days).toBe(406);
+        expect(sinceDuration.hours).toBe(0);
+        expect(sinceDuration.minutes).toBe(0);
+        expect(sinceDuration.seconds).toBe(0);
+        expect(sinceDuration.milliseconds).toBe(0);
+        expect(sinceDuration.microseconds).toBe(0);
+        expect(sinceDuration.nanoseconds).toBe(0);
+    });
+
+    test("equal dates", () => {
+        const equalDateOne = new Temporal.PlainDate(1, 1, 1);
+        const equalDateTwo = new Temporal.PlainDate(1, 1, 1);
+
+        const checkResults = result => {
+            expect(result.years).toBe(-0);
+            expect(result.months).toBe(-0);
+            expect(result.weeks).toBe(-0);
+            expect(result.days).toBe(-0);
+            expect(result.hours).toBe(0);
+            expect(result.minutes).toBe(0);
+            expect(result.seconds).toBe(0);
+            expect(result.milliseconds).toBe(0);
+            expect(result.microseconds).toBe(0);
+            expect(result.nanoseconds).toBe(0);
+        };
+
+        checkResults(equalDateOne.since(equalDateOne));
+        checkResults(equalDateTwo.since(equalDateTwo));
+        checkResults(equalDateOne.since(equalDateTwo));
+        checkResults(equalDateTwo.since(equalDateOne));
+    });
+
+    test("negative direction", () => {
+        const dateOne = new Temporal.PlainDate(2021, 11, 14);
+        const dateTwo = new Temporal.PlainDate(2022, 12, 25);
+        const sinceDuration = dateOne.since(dateTwo);
+
+        expect(sinceDuration.years).toBe(-0);
+        expect(sinceDuration.months).toBe(-0);
+        expect(sinceDuration.weeks).toBe(-0);
+        expect(sinceDuration.days).toBe(-406);
+        expect(sinceDuration.hours).toBe(0);
+        expect(sinceDuration.minutes).toBe(0);
+        expect(sinceDuration.seconds).toBe(0);
+        expect(sinceDuration.milliseconds).toBe(0);
+        expect(sinceDuration.microseconds).toBe(0);
+        expect(sinceDuration.nanoseconds).toBe(0);
+    });
+
+    test("largestUnit option", () => {
+        const values = [
+            ["year", { years: 1, months: 1, days: 11 }],
+            ["month", { months: 13, days: 11 }],
+            ["week", { weeks: 58 }],
+            ["day", { days: 406 }],
+        ];
+
+        const dateOne = new Temporal.PlainDate(2021, 11, 14);
+        const dateTwo = new Temporal.PlainDate(2022, 12, 25);
+
+        for (const [largestUnit, durationLike] of values) {
+            const singularOptions = { largestUnit };
+            const pluralOptions = { largestUnit: `${largestUnit}s` };
+
+            const propertiesToCheck = Object.keys(durationLike);
+
+            // Positive direction
+            const positiveSingularResult = dateTwo.since(dateOne, singularOptions);
+            for (const property of propertiesToCheck)
+                expect(positiveSingularResult[property]).toBe(durationLike[property]);
+
+            const positivePluralResult = dateTwo.since(dateOne, pluralOptions);
+            for (const property of propertiesToCheck)
+                expect(positivePluralResult[property]).toBe(durationLike[property]);
+
+            // Negative direction
+            const negativeSingularResult = dateOne.since(dateTwo, singularOptions);
+            for (const property of propertiesToCheck)
+                expect(negativeSingularResult[property]).toBe(-durationLike[property]);
+
+            const negativePluralResult = dateOne.since(dateTwo, pluralOptions);
+            for (const property of propertiesToCheck)
+                expect(negativePluralResult[property]).toBe(-durationLike[property]);
+        }
+    });
+
+    // FIXME: Unskip when plain date string parsing is implemented.
+    test.skip("PlainDate string argument", () => {
+        const dateTwo = new Temporal.PlainDate(2022, 12, 25);
+        const sinceDuration = dateTwo.since("2021-11-14");
+
+        expect(sinceDuration.years).toBe(-0);
+        expect(sinceDuration.months).toBe(-0);
+        expect(sinceDuration.weeks).toBe(-0);
+        expect(sinceDuration.days).toBe(406);
+        expect(sinceDuration.hours).toBe(0);
+        expect(sinceDuration.minutes).toBe(0);
+        expect(sinceDuration.seconds).toBe(0);
+        expect(sinceDuration.milliseconds).toBe(0);
+        expect(sinceDuration.microseconds).toBe(0);
+        expect(sinceDuration.nanoseconds).toBe(0);
+    });
+});
+
+describe("errors", () => {
+    test("this value must be a Temporal.PlainDate object", () => {
+        expect(() => {
+            Temporal.PlainDate.prototype.since.call("foo");
+        }).toThrowWithMessage(TypeError, "Not an object of type Temporal.PlainDate");
+    });
+
+    test("cannot compare dates from different calendars", () => {
+        const calendarOne = {
+            toString() {
+                return "calendarOne";
+            },
+        };
+
+        const calendarTwo = {
+            toString() {
+                return "calendarTwo";
+            },
+        };
+
+        const dateOneWithCalendar = new Temporal.PlainDate(2021, 11, 14, calendarOne);
+        const dateTwoWithCalendar = new Temporal.PlainDate(2022, 12, 25, calendarTwo);
+
+        expect(() => {
+            dateOneWithCalendar.since(dateTwoWithCalendar);
+        }).toThrowWithMessage(RangeError, "Cannot compare dates from two different calendars");
+    });
+
+    test("disallowed units", () => {
+        const dateOne = new Temporal.PlainDate(2021, 11, 14);
+        const dateTwo = new Temporal.PlainDate(2022, 12, 25);
+
+        const disallowedUnits = [
+            "hour",
+            "minute",
+            "second",
+            "millisecond",
+            "microsecond",
+            "nanosecond",
+        ];
+
+        for (const smallestUnit of disallowedUnits) {
+            const singularSmallestUnitOptions = { smallestUnit };
+            const pluralSmallestUnitOptions = { smallestUnit: `${smallestUnit}s` };
+
+            expect(() => {
+                dateOne.since(dateTwo, singularSmallestUnitOptions);
+            }).toThrowWithMessage(
+                RangeError,
+                `${smallestUnit} is not a valid value for option smallestUnit`
+            );
+
+            expect(() => {
+                dateOne.since(dateTwo, pluralSmallestUnitOptions);
+            }).toThrowWithMessage(
+                RangeError,
+                `${smallestUnit} is not a valid value for option smallestUnit`
+            );
+        }
+
+        for (const largestUnit of disallowedUnits) {
+            const singularLargestUnitOptions = { largestUnit };
+            const pluralLargestUnitOptions = { largestUnit: `${largestUnit}s` };
+
+            expect(() => {
+                dateOne.since(dateTwo, singularLargestUnitOptions);
+            }).toThrowWithMessage(
+                RangeError,
+                `${largestUnit} is not a valid value for option largestUnit`
+            );
+
+            expect(() => {
+                dateOne.since(dateTwo, pluralLargestUnitOptions);
+            }).toThrowWithMessage(
+                RangeError,
+                `${largestUnit} is not a valid value for option largestUnit`
+            );
+        }
+    });
+
+    test("invalid unit range", () => {
+        // smallestUnit -> disallowed largestUnits, see validate_temporal_unit_range
+        // Note that all the "smallestUnits" are all the allowedUnits.
+        const invalidRanges = [
+            ["year", ["month", "week", "day"]],
+            ["month", ["week", "day"]],
+            ["week", ["day"]],
+        ];
+
+        const dateOne = new Temporal.PlainDate(2021, 11, 14);
+        const dateTwo = new Temporal.PlainDate(2022, 12, 25);
+
+        for (const [smallestUnit, disallowedLargestUnits] of invalidRanges) {
+            for (const disallowedUnit of disallowedLargestUnits) {
+                const pluralSmallestUnit = `${smallestUnit}s`;
+                const pluralDisallowedUnit = `${disallowedUnit}s`;
+
+                const singularSmallestSingularDisallowedOptions = {
+                    smallestUnit,
+                    largestUnit: disallowedUnit,
+                };
+                const singularSmallestPluralDisallowedOptions = {
+                    smallestUnit,
+                    largestUnit: pluralDisallowedUnit,
+                };
+                const pluralSmallestSingularDisallowedOptions = {
+                    smallestUnit: pluralSmallestUnit,
+                    largestUnit: disallowedUnit,
+                };
+                const pluralSmallestPluralDisallowedOptions = {
+                    smallestUnit: pluralSmallestUnit,
+                    largestUnit: disallowedUnit,
+                };
+
+                expect(() => {
+                    dateOne.since(dateTwo, singularSmallestSingularDisallowedOptions);
+                }).toThrowWithMessage(
+                    RangeError,
+                    `Invalid unit range, ${smallestUnit} is larger than ${disallowedUnit}`
+                );
+
+                expect(() => {
+                    dateOne.since(dateTwo, singularSmallestPluralDisallowedOptions);
+                }).toThrowWithMessage(
+                    RangeError,
+                    `Invalid unit range, ${smallestUnit} is larger than ${disallowedUnit}`
+                );
+
+                expect(() => {
+                    dateOne.since(dateTwo, pluralSmallestSingularDisallowedOptions);
+                }).toThrowWithMessage(
+                    RangeError,
+                    `Invalid unit range, ${smallestUnit} is larger than ${disallowedUnit}`
+                );
+
+                expect(() => {
+                    dateOne.since(dateTwo, pluralSmallestPluralDisallowedOptions);
+                }).toThrowWithMessage(
+                    RangeError,
+                    `Invalid unit range, ${smallestUnit} is larger than ${disallowedUnit}`
+                );
+            }
+        }
+    });
+});