/* eslint-env mocha */

import assert from 'assert'
import compareAsc from '.'

describe('compareAsc', () => {
  it('returns 0 if the given dates are equal', () => {
    const result = compareAsc(
      new Date(1989, 6 /* Jul */, 10),
      new Date(1989, 6 /* Jul */, 10)
    )
    assert(result === 0)
  })

  it('returns -1 if the first date is before the second one', () => {
    const result = compareAsc(
      new Date(1987, 1 /* Feb */, 11),
      new Date(1989, 6 /* Jul */, 10)
    )
    assert(result === -1)
  })

  it('returns 1 if the first date is after the second one', () => {
    const result = compareAsc(
      new Date(1989, 6 /* Jul */, 10),
      new Date(1987, 1 /* Feb */, 11)
    )
    assert(result === 1)
  })

  it('sorts the dates array in the chronological order when function is passed as the argument to Array.prototype.sort()', () => {
    const unsortedArray = [
      new Date(1995, 6 /* Jul */, 2),
      new Date(1987, 1 /* Feb */, 11),
      new Date(1989, 6 /* Jul */, 10),
    ]

    const sortedArray = [
      new Date(1987, 1 /* Feb */, 11),
      new Date(1989, 6 /* Jul */, 10),
      new Date(1995, 6 /* Jul */, 2),
    ]

    unsortedArray.sort(compareAsc)
    const result = unsortedArray

    assert.deepStrictEqual(result, sortedArray)
  })

  it('accepts timestamps', () => {
    const result = compareAsc(
      new Date(1987, 1 /* Feb */, 11).getTime(),
      new Date(1989, 6 /* Jul */, 10).getTime()
    )
    assert(result === -1)
  })

  it('returns NaN if the first date is `Invalid Date`', () => {
    const result = compareAsc(new Date(NaN), new Date(1989, 6 /* Jul */, 10))
    assert(isNaN(result))
  })

  it('returns NaN if the second date is `Invalid Date`', () => {
    const result = compareAsc(new Date(1989, 6 /* Jul */, 10), new Date(NaN))
    assert(isNaN(result))
  })

  it('returns NaN if the both dates are `Invalid Date`', () => {
    const result = compareAsc(new Date(NaN), new Date(NaN))
    assert(isNaN(result))
  })

  it('throws TypeError exception if passed less than 2 arguments', () => {
    // @ts-expect-error
    assert.throws(compareAsc.bind(null), TypeError)
    // @ts-expect-error
    assert.throws(compareAsc.bind(null, 1), TypeError)
  })
})