moy-fp/test/Logic/both.test.js

A functional programming library.

import __ from '../../src/Function/__'
/**
 * ((a, b, ..., m) -> Boolean) -> ((a, b, ..., m) -> Boolean) -> ((a, b, ..., m) -> Boolean)
 */
import both from '../../src/Logic/both'

test('both(not using __), return true', () => {
  expect(
    both(a => a > 0)(a => a < 3)(2)
  ).toBeTruthy()
})

test('both(not using __), return false', () => {
  expect(
    both(a => a > 0)(a => a < 3)(4)
  ).toBeFalsy()
})

test('both(using __), return true', () => {
  expect(
    both(__, a => a < 3)(a => a > 0)(2)
  ).toBeTruthy()
})