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// @flow
/* eslint-env mocha */
import assert from 'power-assert'
import getTimezoneOffsetInMilliseconds from '.'
describe('getTimezoneOffsetInMilliseconds', function () {
it('works for a modern date', function () {
var date = new Date(2018, 0 /* Jan */, 1, 12, 34, 56, 789)
var result = date.getTime() - getTimezoneOffsetInMilliseconds(date)
var expectedResult = Date.UTC(2018, 0 /* Jan */, 1, 12, 34, 56, 789)
assert(result === expectedResult)
})
it('works for a date before standardized timezones', function () {
var date = new Date(1800, 0 /* Jan */, 1, 12, 34, 56, 789)
var result = date.getTime() - getTimezoneOffsetInMilliseconds(date)
var expectedResult = Date.UTC(1800, 0 /* Jan */, 1, 12, 34, 56, 789)
assert(result === expectedResult)
})
it('works for a date BC', function () {
var date = new Date(-500, 0 /* Jan */, 1, 12, 34, 56, 789)
var result = date.getTime() - getTimezoneOffsetInMilliseconds(date)
var expectedResult = Date.UTC(-500, 0 /* Jan */, 1, 12, 34, 56, 789)
assert(result === expectedResult)
})
})
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