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

A functional programming library.

import __ from '../../src/Function/__'
/**
 * a -> (a -> b) -> b
 */
import applyTo from '../../src/Function/applyTo'

test('applyTo(not using __)', () => {
  expect(
    applyTo(12, x => x + 1)
  ).toBe(13)
})

test('applyTo(using __)', () => {
  expect(
    applyTo(__, x => x + 1)(12)
  ).toBe(13)
})