Tdd examples from http://scholarcoder.com/1392/ttd-intro

UserNotFoundUserRepositoryTest.java

@Test(expected = RuntimeException.class)
public void testFindByUsername_UsernameNotFound() {
    String username = "kentb";
    UserRepository userRepository = new UserRepositoryImpl();

    //when
    User user = userRepository.findByUsername(username);
}