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Diffstat (limited to 'date-fns/src/differenceInCalendarQuarters/test.ts')
-rw-r--r-- | date-fns/src/differenceInCalendarQuarters/test.ts | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/date-fns/src/differenceInCalendarQuarters/test.ts b/date-fns/src/differenceInCalendarQuarters/test.ts new file mode 100644 index 0000000..f889687 --- /dev/null +++ b/date-fns/src/differenceInCalendarQuarters/test.ts @@ -0,0 +1,104 @@ +/* eslint-env mocha */ + +import assert from 'power-assert' +import differenceInCalendarQuarters from '.' + +describe('differenceInCalendarQuarters', function () { + it('returns the number of calendar quarters between the given dates', function () { + const result = differenceInCalendarQuarters( + new Date(2012, 6 /* Jul */, 2, 18, 0), + new Date(2011, 6 /* Jul */, 2, 6, 0) + ) + assert(result === 4) + }) + + it('returns a negative number if the time value of the first date is smaller', function () { + const result = differenceInCalendarQuarters( + new Date(2011, 6 /* Jul */, 2, 6, 0), + new Date(2012, 6 /* Jul */, 2, 18, 0) + ) + assert(result === -4) + }) + + it('accepts timestamps', function () { + const result = differenceInCalendarQuarters( + new Date(2014, 9 /* Oct */, 2).getTime(), + new Date(2010, 6 /* Jul */, 2).getTime() + ) + assert(result === 17) + }) + + describe('edge cases', function () { + it('the difference is less than a quarter, but the given dates are in different calendar quarters', function () { + const result = differenceInCalendarQuarters( + new Date(2014, 6 /* Jul */, 1), + new Date(2014, 5 /* Jun */, 30) + ) + assert(result === 1) + }) + + it('the same for the swapped dates', function () { + const result = differenceInCalendarQuarters( + new Date(2014, 5 /* Jun */, 30), + new Date(2014, 6 /* Jul */, 1) + ) + assert(result === -1) + }) + + it('the days of months of the given dates are the same', function () { + const result = differenceInCalendarQuarters( + new Date(2014, 3 /* Apr */, 6), + new Date(2014, 0 /* Jan */, 6) + ) + assert(result === 1) + }) + + it('the given dates are the same', function () { + const result = differenceInCalendarQuarters( + new Date(2014, 8 /* Sep */, 5, 0, 0), + new Date(2014, 8 /* Sep */, 5, 0, 0) + ) + assert(result === 0) + }) + + it('does not return -0 when the given dates are the same', () => { + function isNegativeZero(x: number): boolean { + return x === 0 && 1 / x < 0 + } + + const result = differenceInCalendarQuarters( + new Date(2014, 8 /* Sep */, 5, 0, 0), + new Date(2014, 8 /* Sep */, 5, 0, 0) + ) + + const resultIsNegative = isNegativeZero(result) + assert(resultIsNegative === false) + }) + }) + + it('returns NaN if the first date is `Invalid Date`', function () { + const result = differenceInCalendarQuarters( + new Date(NaN), + new Date(2017, 0 /* Jan */, 1) + ) + assert(isNaN(result)) + }) + + it('returns NaN if the second date is `Invalid Date`', function () { + const result = differenceInCalendarQuarters( + new Date(2017, 0 /* Jan */, 1), + new Date(NaN) + ) + assert(isNaN(result)) + }) + + it('returns NaN if the both dates are `Invalid Date`', function () { + const result = differenceInCalendarQuarters(new Date(NaN), new Date(NaN)) + assert(isNaN(result)) + }) + + it('throws TypeError exception if passed less than 2 arguments', function () { + assert.throws(differenceInCalendarQuarters.bind(null), TypeError) + assert.throws(differenceInCalendarQuarters.bind(null, 1), TypeError) + }) +}) |