### Question:
UserRepository { public Completable deleteUser() { return Completable.fromAction(userDao::deleteAll); } @Inject  UserRepository(UserDao userDao); Single<UserEntity> getUser(); Completable putOrPostUser(String userName, String password); Completable deleteUser();  }### Answer:
@Test public void deleteUser_clearsTable() { repo.deleteUser() .test() .assertComplete(); }