### Question:
StoreApi { public Mono<Void> deleteOrder(String orderId) throws WebClientResponseException { Object postBody = null; if (orderId == null) { throw new WebClientResponseException("Missing the required parameter 'orderId' when calling deleteOrder", HttpStatus.BAD_REQUEST.value(), HttpStatus.BAD_REQUEST.getReasonPhrase(), null, null, null); } final Map<String, Object> pathParams = new HashMap<String, Object>(); pathParams.put("order_id", orderId); final MultiValueMap<String, String> queryParams = new LinkedMultiValueMap<String, String>(); final HttpHeaders headerParams = new HttpHeaders(); final MultiValueMap<String, String> cookieParams = new LinkedMultiValueMap<String, String>(); final MultiValueMap<String, Object> formParams = new LinkedMultiValueMap<String, Object>(); final String[] localVarAccepts = { }; final List<MediaType> localVarAccept = apiClient.selectHeaderAccept(localVarAccepts); final String[] localVarContentTypes = { }; final MediaType localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes); String[] localVarAuthNames = new String[] { }; ParameterizedTypeReference<Void> localVarReturnType = new ParameterizedTypeReference<Void>() {}; return apiClient.invokeAPI("/store/order/{order_id}", HttpMethod.DELETE, pathParams, queryParams, postBody, headerParams, cookieParams, formParams, localVarAccept, localVarContentType, localVarAuthNames, localVarReturnType); } StoreApi(); @Autowired  StoreApi(ApiClient apiClient); ApiClient getApiClient(); void setApiClient(ApiClient apiClient); Mono<Void> deleteOrder(String orderId); Mono<Map<String, Integer>> getInventory(); Mono<Order> getOrderById(Long orderId); Mono<Order> placeOrder(Order body);  }### Answer:
@Test public void deleteOrderTest() { String orderId = null; api.deleteOrder(orderId).block(); }