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奇怪的是，当我在控制器中设置String token = ""而不是String token = null时，测试通过了。
Mokito返回默认值null而不是OK字符串。所以我的测试失败了。

Caused by: java.lang.NullPointerException: Cannot invoke "String.toLowerCase()" because "result" is null

字符串
我的测试方法：

@WebMvcTest(ClusterController.class)
class ClusterControllerTest {
    
        @Autowired
        private MockMvc mockMvc;
    
        @MockBean
        private ClusterService clusterService;
    
        @MockBean
        private ClusterRestService clusterRestService;

        @Test
        void testPatchTestClusterVM() throws Exception {     

        //Given
        when(clusterService.startPatchingTest(any(), anyString(), anyString(), anyString())).thenReturn("OK");
        
        //When
        RequestBuilder request = MockMvcRequestBuilders
                .post("/patch/clustertest/mycluster/host/vc2crtp1770461np")
                .accept(MediaType.APPLICATION_JSON);
        
        //Then
        mockMvc.perform(request)
                .andExpect(status().isOk())
                .andReturn();       
    }

型
我的控制器方法：

@PostMapping("/patch/clustertest/{clustername}/host/{hostname}")
    public ResponseEntity<?> patchClusterTestVM(@PathVariable("clustername") String clusterName, @PathVariable("hostname") String hostName) {
        String token = null;
        String uuid = UUID.randomUUID().toString();     
        String result = clusterService.startPatchingTest(new ClusterDetailsClass(1L, "mycluster"), hostName, token, uuid);
        return new ResponseEntity<String>(result.toLowerCase(), HttpStatus.OK);
    }

型
应用测试：

@SpringBootTest
class MyApplicationTests {

    @Test
    void contextLoads() {
    }

}

型