### Question:
LoginInteractorImpl implements LoginInteractor { @Override public void doSignIn(String email, String password) { mRepository.signIn(email, password); } LoginInteractorImpl(); @VisibleForTesting  LoginInteractorImpl(LoginRepository repository); @Override void doSignIn(String email, String password); @Override void doSignUp(String email, String password); @Override void doCheckAuthenticated();  }### Answer:
@Test public void testDoSignIn() throws Exception { mImplementor.doSignIn("baldomero", "llegateligero"); verify(mRepository).signIn("baldomero", "llegateligero"); }