@Override
    public String encrypt(String plainText) {
        throw new UnsupportedOperationException("Encrypting using DES is no longer supported!");
    }
@Test
    public void shouldNotEncryptText() {
        assertThatCode(() -> desEncrypter.encrypt(null))
                .isInstanceOf(UnsupportedOperationException.class)
                .hasMessage("Encrypting using DES is no longer supported!");
    }