### Question:
DeleteHandler extends BaseHandler<CallbackContext> { @Override public ProgressEvent<ResourceModel, CallbackContext> handleRequest( final AmazonWebServicesClientProxy proxy, final ResourceHandlerRequest<ResourceModel> request, final CallbackContext callbackContext, final Logger logger) { this.clientProxy = proxy; this.logger = logger; final ImagebuilderClient imagebuilderClient = ClientBuilder.getImageBuilderClient(); final ResourceModel model = request.getDesiredResourceState(); try { proxy.injectCredentialsAndInvokeV2(RequestUtil.generateDeleteInfrastructureConfigurationRequest(model), imagebuilderClient::deleteInfrastructureConfiguration); } catch (ResourceNotFoundException e) { throw new CfnNotFoundException(ResourceModel.TYPE_NAME, e.toString()); } return ProgressEvent.<ResourceModel, CallbackContext>builder() .resourceModel(model) .status(OperationStatus.SUCCESS) .build(); }  @Override ProgressEvent<ResourceModel, CallbackContext> handleRequest(
            final AmazonWebServicesClientProxy proxy,
            final ResourceHandlerRequest<ResourceModel> request,
            final CallbackContext callbackContext,
            final Logger logger);  }### Answer:
@Test public void handleRequest_Success() { final DeleteHandler handler = new DeleteHandler(); final ResourceModel model = ResourceModel.builder().build(); final ResourceHandlerRequest<ResourceModel> request = ResourceHandlerRequest.<ResourceModel>builder() .desiredResourceState(model) .build(); final ProgressEvent<ResourceModel, CallbackContext> response = handler.handleRequest(proxy, request, null, logger); assertThat(response).isNotNull(); assertThat(response.getStatus()).isEqualTo(OperationStatus.SUCCESS); assertThat(response.getCallbackContext()).isNull(); assertThat(response.getCallbackDelaySeconds()).isEqualTo(0); assertThat(response.getResourceModel()).isEqualTo(request.getDesiredResourceState()); assertThat(response.getResourceModels()).isNull(); assertThat(response.getMessage()).isNull(); assertThat(response.getErrorCode()).isNull(); }