使用Mockito测试用例的Spring启动控制器问题

Question

我是Mockito的新手，我必须为我的REST控制器编写一个测试用例，但我不知道我应该从哪里开始。任何帮助都会非常感激。我已根据给定的建议更新了我的控制器。

这是我的控制器：

@RestController
@RequestMapping("/api")
public class TestController {
@Autowired
TestService _testService;

@RequestMapping(value = "/getsearchDetailCourse", method = RequestMethod.GET)
public List<TestDto> getsearchDetailCourse(@RequestParam("courseName") String courseName,
                                             @RequestParam("courseId") Long courseId) throws Exception {      
    return (List<TestDto>) _testService.searchDetailCourse(courseName, courseId);

}
}

我的TestDto：

public class TestDto {
    private String numberOfCourse;
    private Long courseId;

    public TestDto(){}

    public TestDto(String numberOfCourse,Long courseId ){
        super();
        this.numberOfCourse = numberOfCourse;
        this.courseId = courseId;
    }

    public String getNumberOfCourse() {
        return numberOfCourse;
    }

    public void setNumberOfCourse(String numberOfCourse) {
        this.numberOfCourse = numberOfCourse;
    }

    public Long getCourseId() {
        return courseId;
    }

    public void setCourseId(Long courseId) {
        this.courseId = courseId;
    }
}

这是我的测试：

@RunWith(SpringRunner.class)
@WebMvcTest(value = TestController.class, secure = false)
public class TestMethod {

    @Autowired
    private MockMvc mockMvc;

    @MockBean
    private TestService testService;

    TestDto testDto = new testDto("Test",2744L);

    @Test
    public void retrieveDetailsForCourse() throws Exception {

        Mockito.when(
            testService.searchDetailCourse(Mockito.anyString(),
                    ,Mockito.anyLong())).thenReturn(testDto);

        RequestBuilder requestBuilder = MockMvcRequestBuilders.get(
            "/api/getsearchDetailCourse").accept(
            MediaType.APPLICATION_JSON);

        MvcResult result = mockMvc.perform(requestBuilder).andReturn();

        System.out.println(result.getResponse());
        String expected = "[{\"numberOfCourse\":\"Testing1\",\"courseId\":2744},{\"numberOfCourse\":\"Testing2\",\"courseId\":2744}]";

        JSONAssert.assertEquals(expected, result.getResponse()
            .getContentAsString(), false);
    }
}

我想测试控制器，请帮我纠正上面的测试用例。