@Test
public void passwordValidator_checkPassword() {

    PasswordValidator pv = new PasswordValidator();
    assertTrue(pv.isPasswordValid("thispasswordisnotvalid"));
    assertTrue(pv.isPasswordValid("123456"));
    assertFalse(pv.isPasswordValid("this password is not valid as well"));
    assertFalse(pv.isPasswordValid("12345"));
}