@Test
    public void getAFEligibilitySuccessTest() {
        expectationBuilder.expectAFEligibility(VALID_PERSON_ID, VALID_CAMPAIGN_ID);
        AFEligibilityDTO afEligibility = hccnBackendService.getAFEligibility(VALID_PERSON_ID, VALID_CAMPAIGN_ID);
        assertEquals(EligibilityStatus.A1E1, afEligibility.getEligibilityStatus());
    }

    ExpectationBuilder.java

    expectAFEligibility(Long validPersonId, Long validCampaignId) {
        BasicResponse<String> response = new BasicResponse<>();
        if (validPersonId.equals(VALID_PERSON_ID) && validCampaignId.equals(VALID_CAMPAIGN_ID)) {
            response.setCode(ResponseStatus.OK.getCode());
            response.setValue(EligibilityStatus.A1E1.toString());
        } else {
            response.setCode(ResponseStatus.DATA_ERROR.getCode());
            response.setMessage("Failed to get AF Eligibility");
        }
        MultiValueMap<String, String> params = new LinkedMultiValueMap<>(2);
        params.add(PARAM_PERSON_ID, validPersonId.toString());
        params.add(PARAM_CAMPAIGN_ID, validCampaignId.toString());
        UriComponentsBuilder uriComponentsBuilder = UriComponentsBuilder.fromUri(URI.create(connectionConfiguration.getHccnBackendAddress() + GlobalVariables.URL_APPLICATION_FORM_GET_AFE_ELIGIBILITY)).queryParams(params);
        mockRestServiceServer.expect(requestTo(uriComponentsBuilder.toUriString()))
                .andExpect(method(HttpMethod.GET))
                .andRespond(withSuccess(asJsonString(response), APPLICATION_JSON_UTF8));
    }

    HccnBackendServiceImpl.java

     @Override
    public AFEligibilityDTO getAFEligibility(Long personId, Long campaignId) {
        LOG.debug("HCCN Backend API: " + URL_APPLICATION_FORM_GET_AFE_ELIGIBILITY);
        MultiValueMap<String, Object> httpParameters = new LinkedMultiValueMap<>(2);
        httpParameters.add(PARAM_PERSON_ID, personId);
        httpParameters.add(PARAM_CAMPAIGN_ID, campaignId);

        JavaType javaType = createBasicResponseJavaType();
        String afEligibilityCode = (String) callExchangeAndReturnBodyValue(
                getDefaultGetMethodHeaders(),
                httpParameters,
                connectionConfiguration.getHccnBackendAddress() + URL_APPLICATION_FORM_GET_AFE_ELIGIBILITY,
                javaType,
                HttpMethod.GET);

        LOG.debug("HCCN Backend API {} returned value: {}" + URL_APPLICATION_FORM_GET_AFE_ELIGIBILITY, afEligibilityCode);
        return new AFEligibilityDTO(EligibilityStatus.valueOf(afEligibilityCode));
    }


     AFEligibilityDTO getAFEligibility(Long personId, Long campaignId);

      @Override
    public AFEligibilityDTO getAFEligibility(Long personId, Long campaignId) {
        LOG.debug("API: getAFEligibility called with personId: " + personId
                + "and campaignId: " + campaignId);
        return hccnBackendService.getAFEligibility(personId, campaignId);
    }