moy-fp/test/Function/juxt.test.js

A functional programming library.

import __ from '../../src/Function/__'
/**
 * [(a, b, ..., m) -> n] -> ((a, b, ..., m) -> [n])
 */
import juxt from '../../src/Function/juxt'

test('juxt(not using __)', () => {
  expect(
    juxt([
      (a, b) => a + b,
      (a, b) => a - b,
    ])(1)(2)
  ).toEqual([3, -1])
})

test('juxt(using __)', () => {
  expect(
    juxt(__)([
      (a, b) => a + b,
      (a, b) => a - b,
    ])(1)(2)
  ).toEqual([3, -1])
})