text: import compose from '../lib/compose';
  
  const fn1 = (a) => {
    return a + 1;
  };
  
  const fn2 = (a) => {
    return a + 2;
  };
  
  const fn3 = (a) => {
    return a + 3;
  };
  
  test('it should compose functions and return 7', () => {
    expect(compose(fn1, fn2, fn3)(1)).toBe(7);
  });