const expect = require('expect');
const compose = require('./compose.js');

test('compose is a Function', () => {
  expect(compose).toBeInstanceOf(Function);
});
const add5 = x => x + 5;
const multiply = (x, y) => x * y;
const multiplyAndAdd5 = compose(
  add5,
  multiply
);
test('Performs right-to-left function composition', () => {
  expect(multiplyAndAdd5(5, 2)).toBe(15);
});
