moy-fp/test/List/aperture.test.js

A functional programming library.

import __ from '../../src/Function/__'
/**
 * Number -> [a] -> [[a]]
 */
import aperture from '../../src/List/aperture'

test('aperture(not using __)', () => {
  expect(
    aperture(2)([1, 2, 3, 4])
  ).toEqual([[1, 2], [2, 3], [3, 4]])
})

test('aperture(using __)', () => {
  expect(
    aperture(__, [1, 2, 3, 4])(2)
  ).toEqual([[1, 2], [2, 3], [3, 4]])
})