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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/differenceInYears/test.ts | |
parent | f26125e039143b92dc0d84e7775f508ab0cdcaa8 (diff) | |
download | node-vendor-38acabfa6089ab8ac469c12b5f55022fb96935e5.tar.gz node-vendor-38acabfa6089ab8ac469c12b5f55022fb96935e5.tar.bz2 node-vendor-38acabfa6089ab8ac469c12b5f55022fb96935e5.zip |
Diffstat (limited to 'date-fns/src/differenceInYears/test.ts')
-rw-r--r-- | date-fns/src/differenceInYears/test.ts | 146 |
1 files changed, 146 insertions, 0 deletions
diff --git a/date-fns/src/differenceInYears/test.ts b/date-fns/src/differenceInYears/test.ts new file mode 100644 index 0000000..60a3866 --- /dev/null +++ b/date-fns/src/differenceInYears/test.ts @@ -0,0 +1,146 @@ +/* eslint-env mocha */ + +import assert from 'power-assert' +import differenceInYears from '.' + +describe('differenceInYears', function () { + it('returns the number of full years between the given dates', function () { + const result = differenceInYears( + 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 = differenceInYears( + 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 = differenceInYears( + new Date(2014, 6 /* Jul */, 2).getTime(), + new Date(2010, 6 /* Jul */, 2).getTime() + ) + assert(result === 4) + }) + + describe('leap days', function () { + it('supports past dates with right side after leap day', () => { + const result = differenceInYears( + new Date(2004, 1 /* Feb */, 29, 0, 0), + new Date(2002, 2 /* Mar */, 1, 0, 0) + ) + assert(result === 1) + }) + + it('supports past dates with right side before leap day', () => { + const result = differenceInYears( + new Date(2004, 1 /* Feb */, 29, 0, 0), + new Date(2002, 1 /* Feb */, 28, 0, 0) + ) + assert(result === 2) + }) + + it('supports future dates', () => { + const result = differenceInYears( + new Date(2004, 1 /* Feb */, 29, 0, 0), + new Date(2006, 2 /* Mar */, 1, 0, 0) + ) + assert(result === -2) + }) + + it('supports equal dates of same year', () => { + const result = differenceInYears( + new Date(2004, 1 /* Feb */, 29, 0, 0), + new Date(2004, 1 /* Feb */, 29, 0, 0) + ) + assert(result === 0) + }) + + it('supports equal dates of different years', () => { + const result = differenceInYears( + new Date(2008, 1 /* Feb */, 29, 0, 0), + new Date(2004, 1 /* Feb */, 29, 0, 0) + ) + assert(result === 4) + }) + }) + + describe('edge cases', function () { + it('the difference is less than a year, but the given dates are in different calendar years', function () { + const result = differenceInYears( + new Date(2015, 0 /* Jan */, 1), + new Date(2014, 11 /* Dec */, 31) + ) + assert(result === 0) + }) + + it('the same for the swapped dates', function () { + const result = differenceInYears( + new Date(2014, 11 /* Dec */, 31), + new Date(2015, 0 /* Jan */, 1) + ) + assert(result === 0) + }) + + it('the days and months of the given dates are the same', function () { + const result = differenceInYears( + new Date(2014, 8 /* Sep */, 5), + new Date(2012, 8 /* Sep */, 5) + ) + assert(result === 2) + }) + + it('the given dates are the same', function () { + const result = differenceInYears( + 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 = differenceInYears( + 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 = differenceInYears( + 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 = differenceInYears( + 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 = differenceInYears(new Date(NaN), new Date(NaN)) + assert(isNaN(result)) + }) + + it('throws TypeError exception if passed less than 2 arguments', function () { + assert.throws(differenceInYears.bind(null), TypeError) + assert.throws(differenceInYears.bind(null, 1), TypeError) + }) +}) |