moy-fp/test/Math/subtract.test.js

A functional programming library.

import __ from '../../src/Function/__'
/**
 * Number -> Number -> Number
 */
import subtract from '../../src/Math/subtract'

test('subtract(not using __)', () => {
  expect(
    subtract(1)(2)
  ).toBe(1)
})

test('subtract(using __', () => {
  expect(
    subtract(__, 2)(1)
  ).toBe(1)
})