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import {transpose} from './transpose'
test('happy', () => {  const input = [    ['a', 1],    ['b', 2],    ['c', 3],  ]
  expect(transpose(input)).toEqual([    ['a', 'b', 'c'],    [1, 2, 3],  ])})
test('when rows are shorter', () => {  const actual = transpose([[10, 11], [20], [], [30, 31, 32]])  const expected = [[10, 20, 30], [11, 31], [32]]  expect(actual).toEqual(expected)})
test('with empty array', () => {  expect(transpose([])).toEqual([])})
test('array with falsy values', () => {  const actual = transpose([    [true, false, undefined, null],    [null, undefined, false, true],  ])  const expected = [    [true, null],    [false, undefined],    [undefined, false],    [null, true],  ]  expect(actual).toEqual(expected)})