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Diffstat (limited to 'date-fns/src/_lib/startOfUTCISOWeek/test.js')
-rw-r--r-- | date-fns/src/_lib/startOfUTCISOWeek/test.js | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/date-fns/src/_lib/startOfUTCISOWeek/test.js b/date-fns/src/_lib/startOfUTCISOWeek/test.js new file mode 100644 index 0000000..1c93535 --- /dev/null +++ b/date-fns/src/_lib/startOfUTCISOWeek/test.js @@ -0,0 +1,34 @@ +// @flow +/* eslint-env mocha */ + +import assert from 'power-assert' +import startOfUTCISOWeek from '.' + +describe('startOfUTCISOWeek', function() { + it('returns the date with the time set to 00:00:00 and the date set to the first day of an ISO week', function() { + var date = new Date(Date.UTC(2014, 8 /* Sep */, 2, 11, 55, 0)) + var result = startOfUTCISOWeek(date) + assert.deepEqual(result, new Date(Date.UTC(2014, 8 /* Sep */, 1))) + }) + + it('accepts a timestamp', function() { + var date = new Date(Date.UTC(2014, 1 /* Feb */, 11, 11, 55, 0)).getTime() + var result = startOfUTCISOWeek(date) + assert.deepEqual(result, new Date(Date.UTC(2014, 1 /* Feb */, 10))) + }) + + it('does not mutate the original date', function() { + var date = new Date(Date.UTC(2014, 8 /* Sep */, 2, 11, 55, 0)) + startOfUTCISOWeek(date) + assert.deepEqual(date, new Date(Date.UTC(2014, 8 /* Sep */, 2, 11, 55, 0))) + }) + + it('returns `Invalid Date` if the given date is invalid', function() { + var result = startOfUTCISOWeek(new Date(NaN)) + assert(result instanceof Date && isNaN(result)) + }) + + it('throws TypeError exception if passed less than 1 argument', function() { + assert.throws(startOfUTCISOWeek.bind(null), TypeError) + }) +}) |