我正在尝试用junit对控制器类进行单元测试。但是，当我尝试自动连接我的playerrepository接口（它扩展了crudepository）时，会出现以下错误：
2018-12-06 21:59:39.530错误8780---[main]o.s.test.context.testcontextmanager:在允许testexecutionlistener[org.springframework.boot.test.autoconfigure]时捕获到异常。springbootdependencyinjectiontestexecutionlistener@78e117e3]准备测试示例[edu.ceng.gameproject.player。playercontrollertest@4f704591]
（我没有把整个错误都放进去，因为它很长。）
它还说：
原因：org.springframework.beans.factory.nosuchbeandefinitionexception:没有类型为“edu.ceng.gameproject.player.playerrepository”的合格bean可用：至少需要1个符合autowire候选的bean。依赖项注解：{@org.springframework.beans.factory.annotation.autowired（required=true）}
顺便说一下，我可以在我的控制器中进行自动连线来更改数据库。它只是在测试中不起作用。这是我的密码：
控制器类：

@Controller    // This means that this class is a Controller
@RequestMapping(path="/Player") // This means URL's start with /Player 
(after Application path)

public class PlayerController {

 @Autowired 
 private PlayerRepository playerRepository;
}

以下是playerRepository接口：

@Repository
public interface PlayerRepository extends CrudRepository<Player, String> {

}

抽象测试类，我在其中进行自动布线：

@RunWith(SpringJUnit4ClassRunner.class)
 @SpringBootTest(classes = Main.class)

 @WebAppConfiguration
 public abstract class GameProjectBackEndApplicationTests {

 protected MockMvc mvc;

 @Autowired
 WebApplicationContext webApplicationContext;

 @Autowired
 PlayerRepository playerRepository;

 protected void setUp() {
     mvc = 
  MockMvcBuilders.webAppContextSetup(webApplicationContext).build();
 }

}

PlayerController测试类，其中我使用autowired playerrepository：

public class PlayerControllerTest extends GameProjectBackEndApplicationTests 
{

    @Override
    @Before
    public void setUp() {
        super.setUp();
    }

    @Test
    public void test_getUsersList_withOk() throws Exception {
        String uri = "/Player/all";

        // Create user in the database
        Player createdUser = playerRepository.save(new Player("testUser", 
"testPassword"));

        MvcResult mvcResult = mvc.perform(MockMvcRequestBuilders.get(uri)
                .accept(MediaType.APPLICATION_JSON_VALUE)).andReturn();

        // check if status is 200 - OK
        int status = mvcResult.getResponse().getStatus();
        assertEquals(200, status);

        String content = mvcResult.getResponse().getContentAsString();
        Player[] playerList = super.mapFromJson(content, Player[].class);

        // check if list has actually any user
        assertTrue(playerList.length > 0);

        // check returned list has user that we created
        boolean contains = false;
        for (int i = 0; i < playerList.length; i++) {
            if 
              (createdUser.getUsername().equals(playerList[i].getUsername())
                    && 
    createdUser.getPasswd().equals(playerList[i].getPasswd())) {
                contains = true;
            }
        }
        // assert there is a user that we created
        assertTrue(contains);
        //delete created user
        playerRepository.deleteById(createdUser.getUsername());
    }
}

提前谢谢。