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author | Sebastian <sebasjm@gmail.com> | 2021-08-23 16:46:06 -0300 |
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committer | Sebastian <sebasjm@gmail.com> | 2021-08-23 16:48:30 -0300 |
commit | 38acabfa6089ab8ac469c12b5f55022fb96935e5 (patch) | |
tree | 453dbf70000cc5e338b06201af1eaca8343f8f73 /date-fns/src/differenceInISOWeekYears/test.ts | |
parent | f26125e039143b92dc0d84e7775f508ab0cdcaa8 (diff) | |
download | node-vendor-master.tar.gz node-vendor-master.tar.bz2 node-vendor-master.zip |
Diffstat (limited to 'date-fns/src/differenceInISOWeekYears/test.ts')
-rw-r--r-- | date-fns/src/differenceInISOWeekYears/test.ts | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/date-fns/src/differenceInISOWeekYears/test.ts b/date-fns/src/differenceInISOWeekYears/test.ts new file mode 100644 index 0000000..f4192ee --- /dev/null +++ b/date-fns/src/differenceInISOWeekYears/test.ts @@ -0,0 +1,115 @@ +/* eslint-env mocha */ + +import assert from 'power-assert' +import differenceInISOWeekYears from '.' + +describe('differenceInISOWeekYears', function () { + it('returns the number of full ISO week-numbering years between the given dates', function () { + const result = differenceInISOWeekYears( + new Date(2012, 6 /* Jul */, 2, 18, 0), + new Date(2011, 6 /* Jul */, 2, 6, 0) + ) + assert(result === 1) + }) + + it('returns a negative number if the time value of the first date is smaller', function () { + const result = differenceInISOWeekYears( + new Date(2011, 6 /* Jul */, 2, 6, 0), + new Date(2012, 6 /* Jul */, 2, 18, 0) + ) + assert(result === -1) + }) + + it('accepts timestamps', function () { + const result = differenceInISOWeekYears( + new Date(2014, 6 /* Jul */, 2).getTime(), + new Date(2010, 6 /* Jul */, 2).getTime() + ) + assert(result === 4) + }) + + it('handles dates before 100 AD', function () { + const firstDate = new Date(0) + firstDate.setFullYear(14, 0 /* Jan */, 1) + firstDate.setHours(0, 0, 0, 0) + const secondDate = new Date(0) + secondDate.setFullYear(0, 0 /* Jan */, 1) + secondDate.setHours(0, 0, 0, 0) + const result = differenceInISOWeekYears(firstDate, secondDate) + assert(result === 14) + }) + + describe('edge cases', function () { + it('the difference is less than an ISO year, but the given dates are in different calendar years', function () { + const result = differenceInISOWeekYears( + new Date(2012, 0 /* Jan */, 2), + new Date(2012, 0 /* Jan */, 1) + ) + assert(result === 0) + }) + + it('the same for the swapped dates', function () { + const result = differenceInISOWeekYears( + new Date(2012, 0 /* Jan */, 1), + new Date(2012, 0 /* Jan */, 2) + ) + assert(result === 0) + }) + + it('the ISO weeks and weekdays of the given dates are the same', function () { + const result = differenceInISOWeekYears( + new Date(2013, 11 /* Dec */, 30), + new Date(2012, 0 /* Jan */, 2) + ) + assert(result === 2) + }) + + it('the given dates are the same', function () { + const result = differenceInISOWeekYears( + 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 = differenceInISOWeekYears( + 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 = differenceInISOWeekYears( + 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 = differenceInISOWeekYears( + 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 = differenceInISOWeekYears(new Date(NaN), new Date(NaN)) + assert(isNaN(result)) + }) + + it('throws TypeError exception if passed less than 2 arguments', function () { + assert.throws(differenceInISOWeekYears.bind(null), TypeError) + assert.throws(differenceInISOWeekYears.bind(null, 1), TypeError) + }) +}) |