import { describe, given, it, Test } from '@typed/test'

import { flatten } from './flatten'

export const test: Test = describe(`flatten`, [
  given(`an array of arrays`, [
    it(`returns an unnested array`, ({ equal }) => {
      const arr = [
        [1, 2],
        [3, 4],
        [5, 6],
        [7, 8],
      ]

      equal([1, 2, 3, 4, 5, 6, 7, 8], flatten<number>(arr))
    }),
  ]),
])