spring-boot error org.springframework.security.core.userdetails.User cannot be cast to in.cad.security.model.MyUserPrincipal class - spring

Question

I am completely new to spring boot and trying to write Unit test cases but stuck completely and not able to understand how Authentication works.
Controller class
#PostMapping (path = "/createConcept")
#ApiOperation(value = "Composite object with conceptCO with added roles",
response = ConceptCO.class)
public ConceptCO createConcept(
#RequestBody final ConceptFormVO conceptFormVO,
#ApiIgnore Authentication authentication
) {
ConceptDTO conceptDTO = new ConceptDTO();
BeanUtils.copyProperties(conceptFormVO, conceptDTO,
AppUtils.getNullPropertyNames(conceptFormVO));
LOGGER.info("Input Config : ::{}", conceptFormVO);
List<UserPrincipalAttributes> cadenzPrincipalAttributesList = PrincipalUtil.getRoles(authentication);
String token = PrincipalUtil.getToken(authentication);
return conceptDelegate.createConcept(conceptDTO,cadenzPrincipalAttributesList,token);
}
PrincipalUtil.java
public final class PrincipalUtil {
public static final String BEARER_TOKEN = "Bearer ";
public static List<UserPrincipalAttributes> getRoles(final Authentication authentication) {
UserPrincipal user =
(UserPrincipal) authentication.getPrincipal();
return new ArrayList<>(user.getUserPrincipalAttributes());
}
public static String getToken(final Authentication authentication) {
UserPrincipal user =
(UserPrincipal) authentication.getPrincipal();
String finalToken = BEARER_TOKEN + user.getToken();
return finalToken;
}
}
UserPrincipal.java
public class UserPrincipal implements AuthenticatedPrincipal {
private String name;
private Set<UserPrincipalAttributes> userPrincipalAttributes;
private String token;
// getter & setters
}
UserPrincipalAttributes .java
public class UserPrincipalAttributes {
Set<String> columns;
Set<String> concepts;
String role;
// getter & setters
}
Below is my test function
private Authentication authentication = SecurityContextHolder.getContext()
.getAuthentication();
private static final String BASE_URL = "/xyz";
#Before
public void setup() throws Exception {
mvc = MockMvcBuilders
.webAppContextSetup(this.wac)
.apply(SecurityMockMvcConfigurers.springSecurity())
.build();
}
#Test
#WithMockUser(username = "test_user1")
public void createConceptTest() throws Exception {
ConceptFormVO conceptFormVO = new ConceptFormVO();
conceptFormVO.setConceptExpression("payment_cat = ABC");
conceptFormVO.setConceptName("all_subsc_test");
RequestBuilder createConceptRequest = post(BASE_URL + "/createConcept",authentication)
.header("Authorization",
String.format("Bearer %s", accessToken))
.content(objectMapper.writeValueAsString(conceptFormVO))
.contentType(MediaType.APPLICATION_JSON)
.accept(MediaType.APPLICATION_JSON);
this.mvc
.perform(createConceptRequest)
.andExpect(status().isOk())
}
Running above test case gives me error
java.lang.ClassCastException: org.springframework.security.core.userdetails.User cannot be cast to in.at.security.model.UserPrincipal
at in.at.security.util.PrincipalUtil.getRoles(PrincipalUtil.java)
Apologies for silly mistakes.

Answer 1

instead of passing Authentication u can directly inject AuthenticatedPrincipal refer below code let me know if it works,
import java.util.Collection;
import java.util.Map;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.core.annotation.AuthenticationPrincipal;
import org.springframework.security.oauth2.core.user.OAuth2User;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
public class SampleController {
#PostMapping (path = "/createConcept")
public SampleController createConcept(
#RequestBody final ConceptFormVO conceptFormVO,
#AuthenticationPrincipal OAuth2User principal
) {
Map<String, Object> principalDetails = principal.getAttributes();
Collection<? extends GrantedAuthority> authorities = principal.getAuthorities();
.....
}
}