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

A functional programming library.

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

test('multiply(not using __)', () => {
  expect(
    multiply(5)(2)
  ).toBe(10)
})

test('multiply(using __', () => {
  expect(
    multiply(__, 2)(5)
  ).toBe(10)
})