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

AuthenicateUserLoginWithRepositoryFailedTest.java

@Test(expected = RuntimeException.class)
public void userLoginWhereUserIsNotFound() {
    String username = "kentbeck";
    String password = "letmein";
    UserRepository userRepository = new UserRepositoryImpl();
    UserService userService = new UserService(userRepository);

    User user = userService.authenticate(username, password);
}