我需要写一个jUnit测试用例，它总是因为“/contextpath/oauth2/token？grant_type=password”。

@RunWith(SpringRunner.class)
@WebAppConfiguration
@AutoConfigureMockMvc
@SpringBootTest(classes = UserAuthApplication.class)
class UserAuthApplicationTests {

    
    @Autowired
    private MockMvc mockMvc;

    private String obtainAccessToken(final String username, final String password) throws Exception {

        MultiValueMap<String, String> params = new LinkedMultiValueMap<>();
        params.add("grant_type", "password");
        params.add("username", username);
        params.add("password", password);

        ResultActions result = mockMvc
                .perform(post("/userauth/oauth/token").params(params).with(httpBasic("user-test","testp"))
                        .accept("application/json"))
                .andExpect(status().isOk())
                .andExpect((ResultMatcher) content());

        String resultString = result.andReturn().getResponse().getContentAsString();

        JacksonJsonParser jsonParser = new JacksonJsonParser();
        return jsonParser.parseMap(resultString).get("access_token").toString();
    }

    @Test
    public void tokenNotGiven_whenGetSecureRequest_thenUnauthorized() throws Exception {
        mockMvc.perform(get("/userauth/apis/v1/users").param("email", ""))
                .andExpect(status().isUnauthorized());
        
    }
    
    @Test
    public void givenValidUserCredentials_whenGetSecureRequest_thenAuthorized() throws Exception {
        String accessToken = obtainAccessToken("test@gmail.com", "test1");
        mockMvc.perform(get("/userauth/apis/v1/users")
          .header("Authorization", "Bearer " + accessToken)
          .param("email", ""))
          .andExpect(status().isOk());
        
        mockMvc.perform(get("/userauth/apis/v1/users")
              .header("Authorization", "Bearer " + accessToken)
              .param("email", ""))
              .andExpect(status().isOk())
            .andExpect((ResultMatcher) content().contentType("application/json;charset=UTF-8"))
            .andExpect(jsonPath("$.success", is(true)));
    }

}

当我运行上面的测试用例时，它给予我下面的错误：

MockHttpServletRequest:
      HTTP Method = POST
      Request URI = /userauth/oauth/token
       Parameters = {grant_type=[password], username=[test@gmail.com], password=[test1]}
          Headers = [Accept:"application/json", Authorization:"Basic dXNlci1hdXRoOm1hbm9q"]
             Body = null
    Session Attrs = {}

Handler:
             Type = null

Async:
    Async started = false
     Async result = null

Resolved Exception:
             Type = null

ModelAndView:
        View name = null
             View = null
            Model = null

FlashMap:
       Attributes = null

MockHttpServletResponse:
           Status = 401
    Error message = null
          Headers = [Vary:"Origin", "Access-Control-Request-Method", "Access-Control-Request-Headers", Content-Type:"application/json", X-Content-Type-Options:"nosniff", X-XSS-Protection:"1; mode=block", Cache-Control:"no-cache, no-store, max-age=0, must-revalidate", Pragma:"no-cache", Expires:"0", X-Frame-Options:"DENY"]
     Content type = application/json
             Body = {"status":"UNAUTHORIZED","message":"Full authentication is required to access this resource"}
    Forwarded URL = null
   Redirected URL = null
          Cookies = []

预计它应该生成令牌，即使在基于ReactJS的应用程序中也可以生成和正常工作，但它只在jUnit中失败。