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

import { pipe } from './pipe'

export const test: Test = describe(`pipe`, [
  it('pipes functions', ({ equal }) => {
    const f = (x: number) => x + 1
    const g = (x: number) => x * 2

    equal(pipe(f)(1), 2)
    equal(
      pipe(
        f,
        g
      )(1),
      4
    )
    equal(
      pipe(
        f,
        g,
        g
      )(1),
      8
    )
    equal(
      pipe(
        f,
        g,
        g,
        f
      )(1),
      9
    )
    equal(
      pipe(
        f,
        g,
        g,
        f,
        g,
        g,
        f
      )(1),
      37
    )
  }),
])