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// @flow
/* eslint-env mocha */
import assert from 'assert'
import addHours from '.'
describe('addHours', function() {
it('adds the given numbers of hours', function() {
const result = addHours(new Date(2014, 6 /* Jul */, 10, 23, 0), 2)
assert.deepStrictEqual(result, new Date(2014, 6 /* Jul */, 11, 1, 0))
})
it('accepts a timestamp', function() {
const result = addHours(
new Date(2014, 6 /* Jul */, 10, 23, 0).getTime(),
26
)
assert.deepStrictEqual(result, new Date(2014, 6 /* Jul */, 12, 1, 0))
})
it('converts a fractional number to an integer', function() {
const result = addHours(new Date(2014, 6 /* Jul */, 10, 23, 0), 2.5)
assert.deepStrictEqual(result, new Date(2014, 6 /* Jul */, 11, 1, 0))
})
it('implicitly converts number arguments', function() {
// @ts-expect-error
const result = addHours(new Date(2014, 6 /* Jul */, 10, 23, 0), '2')
assert.deepStrictEqual(result, new Date(2014, 6 /* Jul */, 11, 1, 0))
})
it('does not mutate the original date', function() {
const date = new Date(2014, 6 /* Jul */, 10, 23, 0)
addHours(date, 10)
assert.deepStrictEqual(date, new Date(2014, 6 /* Jul */, 10, 23, 0))
})
it('returns `Invalid Date` if the given date is invalid', function() {
const result = addHours(new Date(NaN), 2)
assert(result instanceof Date && isNaN(result.getTime()))
})
it('returns `Invalid Date` if the given amount is NaN', function() {
const result = addHours(new Date(2014, 6 /* Jul */, 10, 23, 0), NaN)
assert(result instanceof Date && isNaN(result.getTime()))
})
it('throws TypeError exception if passed less than 2 arguments', function() {
// @ts-expect-error
assert.throws(addHours.bind(null), TypeError)
// @ts-expect-error
assert.throws(addHours.bind(null, 1), TypeError)
})
})
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