}

    @Test
    public void test_constants_reference() {
        // Test that the constant used is accessible and has expected value
        assertEquals("fess.search_engine.http_address", Constants.FESS_SEARCH_ENGINE_HTTP_ADDRESS);
    }

    @Test
    public void test_static_method_signature() {
        // Verify method signature is correct
        try {

                .execute()
                .actionGet(fessConfig.getIndexHealthTimeout());

        final SuggestSettingsBuilder settingsBuilder = SuggestSettings.builder();
        settingsBuilder.addInitialSettings("search_engine.type", fessConfig.getFesenType());
        settingsBuilder.bulkTimeout(fessConfig.getIndexBulkTimeout());
        settingsBuilder.clusterTimeout(fessConfig.getIndexHealthTimeout());

    /** The key of the configuration. e.g. default */
    String search_engine_TYPE = "search_engine.type";

    /** The key of the configuration. e.g. http://localhost:9201 */
    String search_engine_HTTP_URL = "search_engine.http.url";

    /** The key of the configuration. e.g.  */
    String search_engine_HTTP_SSL_certificate_authorities = "search_engine.http.ssl.certificate_authorities";

    /** The key of the configuration. e.g.  */

    public static final String MATCHES_ALL_QUERY = "*:*";

    /** Configuration key for search engine HTTP address. */
    public static final String FESS_SEARCH_ENGINE_HTTP_ADDRESS = "fess.search_engine.http_address";

    /** Default number of results per page. */
    public static final int DEFAULT_PAGE_SIZE = 20;

    /** Default starting count for pagination. */