text: import cipher from './cipher';
  
  it('encrypts(example 1)', () => {
    expect(cipher.encrypt('hello nemo', 3)).toBe('khoor qhpr');
  });
  
  it('encrypts(punctuation)', () => {
    expect(cipher.encrypt('attack at dawn ! ', 1)).toBe('buubdl bu ebxo ! ');
  });
  
  it('decrypts(example 1)', () => {
    expect(cipher.encrypt('attack at dawn', 1)).toBe('buubdl bu ebxo');
  });
  
  it('decrypts(punctuation)', () => {
    expect(cipher.decrypt('eqtiku ctg cyguqog ! ', 2)).toBe('corgis are awesome ! ');
  });
  