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

A functional programming library.

import __ from '../../src/Function/__'
/**
 * ((b, a) -> c) -> [b] -> [a] -> [c]
 */
import zipWith from '../../src/List/zipWith'

test('zipWith(not using __), the same length of two list', () => {
  expect(
    zipWith((b, a) => a + b)([4, 5, 6])([1, 2, 3])
  ).toEqual([5, 7, 9])
})

test('zipWith(not using __), not the same length of two list', () => {
  expect(
    zipWith((b, a) => a + b)([3, 4, 5])([1, 2])
  ).toEqual([4, 6])
})

test('zipWith(using __), the same length of two list', () => {
  expect(
    zipWith((b, a) => a + b, __, [1, 2, 3])([4, 5, 6])
  ).toEqual([5, 7, 9])
})