Test a method that returns a ResponseEntity from a service class - Spring boot - spring-boot

Question

I have a service method which returns a ResponseEntity<>, when I am testing the rest endpoint it always returns below error.The error says that it haven't return the expected json.
java.lang.AssertionError: No value at JSON path "$.status"
This is the method I'am using
#Test
void Should_ReturnOk_When_VerifyOtpIsSuccessful() throws Exception {
ResponseWrapper responseWrapper =
new ResponseWrapper(ResponseStatusType.SUCCESS, "SUCCESSFULLY_VERIFIED", null);
ResponseEntity<ResponseWrapper> responseWrapperResponseEntity =new ResponseEntity<>(responseWrapper,HttpStatus.ACCEPTED);
when(otpService.verifySmsOtp(otpVerifyRequestDto)).thenReturn(responseWrapperResponseEntity);
this.mockMvc.perform(MockMvcRequestBuilders
.post(OTP_VERIFY_URI)
.contentType(MediaType.APPLICATION_JSON)
.header("app-key", "xxxx")
.content(asJsonString(otpVerifyRequestDto)))
.andExpect(status().isOk())
.andExpect(jsonPath("$.status", is("S")))
;
}
Here ResponseWrapper is a model class
#Getter
public class ResponseWrapper {
private ResponseStatusType status;
private String message;
private String data;
public ResponseWrapper(ResponseStatusType statusType, String message, String data) {
this.status = statusType;
this.message = message;
this.data = data;
}
}
Could you help me out to sort this issue.
Edited:
Seems like the ResponseEntity does not return the JSON itself, it have other objects
Appreciate your input on this.
Test Class Initialization
#AutoConfigureMockMvc
public class OtpControllerTest {
#Mock
private OtpServiceImpl otpService;
private Validator validator = new Validator();
private OtpRequestDto otpRequestDtoEmail = otpRequestDto();
private OtpVerifyRequestDto otpVerifyRequestDto = otpVerifyRequestDto();
#InjectMocks
private OtpController otpController;
private MockMvc mockMvc;
#BeforeEach
void setUp() {
MockitoAnnotations.initMocks(this);
otpController = new OtpController(otpService, validator);
this.mockMvc = MockMvcBuilders.standaloneSetup(otpController).build();
}
// test methods here
//
}
Thank you.