模拟对象似乎不起作用，正在调用实际函数。
我的控制器类如下：-

@RestController
public class A {

    @PostMapping(path = "/api/methods", consumes = "application/json", produces = "application/json")
    public static ResponseEntity<Object> controllerFunction(@Valid @RequestBody String request,
        @RequestHeader(value = "header-content") String header_content) {

        JSONObject response = B.getAns(request);
        return ResponseEntity.status(HttpStatus.OK).body(response.toString());
    }

}

我的B类如下：-

@Service
public class B {

    private static C client;

    @Autowired
    private C beanClient;

    @PostConstruct
    public void init() {
        B.client = beanClient;
    }

    public static JSONObject getAns(String request) {
        // This is the line that I intend to mock but gets ignored. It goes into the function search instead.

        JSONObject resp = client.search(searchRequest, requestHeaderOptions); // assume that these two variables passed as arguments are not null and have some content.

        // searchRequest is of type SearchRequest
        // requestHeaderOptions is of type RequestOptions
        return resp;
    }
}

这是我的测试类：

@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT, classes = {
    ControllerApplication.class, A.class, B.class, C.class
})
@ActiveProfiles("test")
public class ProjectTest {

    @Mock
    private C client;

    @InjectMocks
    A a;

    private MockMvc mockMvc;

    @BeforeSuite
    public void setup() {

        // I have tried both MockitoAnnotations.initMocks and openMocks. Both don't work
        MockitoAnnotations.openMocks(this);
        this.mockMvc = MockMvcBuilders.standaloneSetup(a).build();

    }

    @Test(enabled = true)
    public void testing() throws Exception {

        JSONObject obj = new JSONObject() // assume this object is not null

        // This statement doesn't seem to work
        doReturn(obj).when(client).search(any(SearchRequest.Class), any(RequestOptions.Class));

        MockHttpServletRequestBuilder mockRequest = MockMvcRequestBuilders.post("/api/methods")
            .contentType(MediaType.APPLICATION_JSON)
            .accept(MediaType.APPLICATION_JSON)
            .header("header-content", "something")
            .content("someData");

        mockMvc.perform(mockRequest)
            .andExpect(content().contentType(MediaType.APPLICATION_JSON))
            .andExpect(status().isOk())
            .andExpect(content().json(jsonResponse));

    }
}

如果你注意到我已经在我的类B中创建了一个类C的静态变量，这是程序结构本身的一部分，不能改变。
在给定这段代码的情况下，是否可以模拟client.search函数？