整合JUnit

public interface BookService {
    public void save();
}

@Service
public class BookServiceImpl implements BookService {
    @Override
    public void save() { System.out.println("book service is running ..."); }
}

@SpringBootTest
class SpringbootTestApplicationTests {
    @Autowired
    private BookService bookService;

    @Test
    public void save() {
        bookServie.save();
    }
}