我正在尝试为一个控制器编写一个单元测试，该控制器根据设备类型执行不同的操作。
第一个控制器方法及其测试工作正常，方法参数 * 模型 * 有一个值，我可以在测试中验证该值。
第二个控制器方法在从brwoser调用时预期设备工作，但在单元测试中不。

org.springframework.web.util.NestedServletException: Request processing failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.mobile.device.Device]: Specified class is an interface

我的问题：为什么参数 model 示例化正确，而 device 示例化不正确？有没有办法在MockMvc请求中设置设备，或者我可以以某种方式模拟设备？
控制器：

@Controller
@RequestMapping("home")
public class MyController {

    @RequestMapping("/test1")
    public String doSomething1(Model model) {
        String value = "foo";
        model.addAttribute("attribute1", value);        
        return "newUrl";
    }

    @RequestMapping("/test2")
    public String doSomething2(Model model, Device device) {
        if (device.isNormal()) {
          // do stuff
        }
        return "newUrl";
    }
}

测试项目：

@RunWith(SpringRunner.class)
@SpringBootTest(classes = Application.class, webEnvironment=SpringBootTest.WebEnvironment.RANDOM_PORT)
@WithMockUser(username="admin", authorities = {"ALL"})
public class MyControllerTest {

    private MockMvc mockMvc;

    @InjectMocks
    private MyController controllerUnderTest;   

    @Before
    public void setUp() {
        MockitoAnnotations.initMocks(this);
        InternalResourceViewResolver viewResolver = new InternalResourceViewResolver();
        viewResolver.setPrefix("/WEB-INF/classes/templates");
        viewResolver.setSuffix(".html");
        this.mockMvc =
                MockMvcBuilders.standaloneSetup(this.controllerUnderTest)
                        .setViewResolvers(viewResolver)
                        .build();
    }

    @Test
    public void doSomething1Test() throws Exception {
        this.mockMvc.perform(get("/home/test1"))
        .andExpect(status().isOk())
        .andExpect(model().attribute("attribute1", contains("foo")));   
    }

    @Test
    public void doSomething2Test() throws Exception {
        this.mockMvc.perform(get("/home/test2"))
        .andExpect(status().isOk()));   
    }
}