Unit tests with dates 11

isBirthdayTests3.java

@Test
public void should_return_false_when_today_isnt_the_birthday_of_user() throws Exception {
  User user = new User().setDateOfBirth(five_july_2000);
  SystemTime.setTimeSource(new TimeSource() {
    @Override
    public long millis() {
      return six_july_2010.getTime();
    }
  });

  assertThat(user.isBirthDay(), is(false));
}

@Test
public void should_return_true_when_today_is_the_birthday_of_user() throws Exception {
  User user = new User().setDateOfBirth(five_july_2000);
  SystemTime.setTimeSource(new TimeSource() {
    @Override
    public long millis() {
      return five_july_2010.getTime();
    }
  });

  assertThat(user.isBirthDay(), is(true));
}