assertNotNull(exception);
        assertNull(exception.getMessage());
        assertNull(exception.getCause());
    }

    @Test
    public void test_constructor_withEmptyMessage() {
        // Test constructor with empty message
        String message = "";
        SearchEngineClientException exception = new SearchEngineClientException(message);

            if (response.hasFailures()) {
                throw new SearchEngineClientException(response.buildFailureMessage());
            }
            return true;
        } catch (final InterruptedException e) {
            throw new InterruptedRuntimeException(e);
        } catch (final ExecutionException e) {
            throw new SearchEngineClientException("Failed to update bulk data.", e);
        }
    }

    /**

     *
     * @return the engine information
     * @throws SearchEngineClientException if the client is not an HttpClient
     */
    public EngineInfo getEngineInfo() {
        if (client instanceof final HttpClient httpClient) {
            return httpClient.getEngineInfo();
        }
        throw new SearchEngineClientException("client is not HttpClient.");
    }

    //
    // Fesen Client