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

A functional programming library.

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

test('transpose(not using __), the same length of innerList', () => {
  expect(
    transpose([[1, 2, 3], [4, 5, 6], [7, 8, 9]])
  ).toEqual([[1, 4, 7], [2, 5, 8], [3, 6, 9]])
})

test('transpose(not using __), not the same length of innerList', () => {
  expect(
    transpose([[1, 2, 3], [4, 5], [6, 7, 8, 9]])
  ).toEqual([[1, 4, 6], [2, 5, 7], [3, 8], [9]])
})

test('transpose(using __), the same length of innerList', () => {
  expect(
    transpose(__)([[1, 2, 3], [4, 5, 6], [7, 8, 9]])
  ).toEqual([[1, 4, 7], [2, 5, 8], [3, 6, 9]])
})