}

    @Test
    public void test_escapeQueryValue_consecutiveBackslashes() {
        assertEquals("\\\\\\\\", chatClient.testEscapeQueryValue("\\\\"));
    }

    // ========== searchWithQuery tests ==========

    @Test
    public void test_searchWithQuery_null() {
        final List<Map<String, Object>> result = chatClient.testSearchWithQuery(null);
        assertTrue(result.isEmpty());

    /**
     * Searches documents using a Fess query.
     *
     * @param query the Fess query string
     * @return the list of search result documents
     */
    protected List<Map<String, Object>> searchWithQuery(final String query) {
        return searchWithQueryAndMetadata(query).getDocuments();
    }

    private ChatSearchResult searchWithQueryAndMetadata(final String query) {