*/
    public void test_init_withEmptySessionId() {
        urlFilter.init("");
        // Should handle empty session ID gracefully
        assertNotNull(urlFilter);
    }

    /**
     * Test adding a single include pattern
     */
    public void test_addInclude_singlePattern() {
        String sessionId = "test-session-002";
        urlFilter.init(sessionId);

        urlFilter.addInclude("https://example.com/.*");

     */
    public void test_name_boundaryCases() {
        // Single character
        testTransformer.setName("a");
        assertEquals("a", testTransformer.getName());

        // Single space
        testTransformer.setName(" ");
        assertEquals(" ", testTransformer.getName());

        // Single Unicode character
        testTransformer.setName("あ");

        runner = new OpenSearchRunner();
        runner.onBuild((number, settingsBuilder) -> {
            settingsBuilder.put("http.cors.enabled", true);
            settingsBuilder.put("discovery.type", "single-node");
        })
                .build(newConfigs().clusterName("AnalyzerConverterTest")
                        .numOfNode(1)
                        .pluginTypes("org.codelibs.opensearch.extension.ExtensionPlugin"));

 * Katakana string into a list of possible Alphabet readings. It uses a predefined mapping of Katakana
 * characters to their Alphabet equivalents, handling both single and double Katakana character combinations.
 * </p>
 *
 * <p>
 * The conversion process involves iterating through the input string, identifying Katakana characters,

 * <li>{@link #SuggestIndexer(Client, String, ReadingConverter, ReadingConverter, Normalizer, SuggestAnalyzer, SuggestSettings, ExecutorService)}
 * </ul>
 *
 * <p>Methods:
 * <ul>
 * <li>{@link #index(SuggestItem)} - Index a single suggest item.
 * <li>{@link #index(SuggestItem[])} - Index multiple suggest items.
 * <li>{@link #delete(String)} - Delete a suggest item by ID.
 * <li>{@link #deleteByQuery(String)} - Delete suggest items by query string.

        assertNotNull(itemReadings);
        assertEquals(0, itemReadings.length);
    }

    @Test
    public void testToSuggestItemWithSingleReading() {
        // Test toSuggestItem with single reading
        String word = "single reading";
        float boost = 1.5f;
        List<String> readings = Arrays.asList("reading1");
        List<String> fields = Arrays.asList("field1");
        List<String> tags = Arrays.asList("tag1");

        assertNotNull(emptyKeywords);
        assertEquals(0, emptyKeywords.length);

        // Test single word query
        String[] singleKeyword = SuggestUtil.parseQuery("single", field);
        assertNotNull(singleKeyword);
        assertEquals(1, singleKeyword.length);
        assertEquals("single", singleKeyword[0]);
    }

    @Test
    public void testParseQueryWithTooManyTerms() {

        runner = new OpenSearchRunner();
        runner.onBuild((number, settingsBuilder) -> {
            settingsBuilder.put("http.cors.enabled", true);
            settingsBuilder.put("discovery.type", "single-node");
        })
                .build(newConfigs().clusterName("SuggestSettingsBuilderTest")
                        .numOfNode(1)
                        .pluginTypes("org.codelibs.opensearch.extension.ExtensionPlugin"));

     */
    protected String getResultDataHeader() {
        // TODO: Support other XML header types
        return "<?xml version=\"1.0\"?>\n<doc>\n";
    }

    /**
     * Returns the result data body for a single value.
     * @param name The name of the field.
     * @param value The value of the field.
     * @return The result data body.
     */
    protected String getResultDataBody(final String name, final String value) {

        } catch (final Exception e) {
            throw new OpenSearchAccessException("Failed to refresh.", e);
        }
    }

    /**
     * Inserts a single document into the OpenSearch index.
     *
     * @param target The object to insert.
     * @param opType The operation type (CREATE, INDEX, etc.).
     * @return The IndexResponse from OpenSearch.