/* eslint-env mocha */

import assert from 'assert'
import startOfMinute from '.'

describe('startOfMinute', () => {
  it('returns the date with the time set to the first millisecond of a minute', () => {
    const date = new Date(2014, 11 /* Dec */, 1, 22, 15, 45, 400)
    const result = startOfMinute(date)
    assert.deepStrictEqual(result, new Date(2014, 11 /* Dec */, 1, 22, 15))
  })

  it('accepts a timestamp', () => {
    const date = new Date(2014, 11 /* Dec */, 1, 22, 15).getTime()
    const result = startOfMinute(date)
    assert.deepStrictEqual(result, new Date(2014, 11 /* Dec */, 1, 22, 15))
  })

  it('does not mutate the original date', () => {
    const date = new Date(2014, 11 /* Dec */, 1, 22, 15, 45, 400)
    startOfMinute(date)
    assert.deepStrictEqual(
      date,
      new Date(2014, 11 /* Dec */, 1, 22, 15, 45, 400)
    )
  })

  it('returns `Invalid Date` if the given date is invalid', () => {
    const result = startOfMinute(new Date(NaN))
    assert(result instanceof Date && isNaN(result.getTime()))
  })

  it('throws TypeError exception if passed less than 1 argument', () => {
    // @ts-expect-error
    assert.throws(startOfMinute.bind(null), TypeError)
  })
})