private SearchEngineClient searchEngineClient;
    private FessConfig fessConfig;

    private boolean deleteByQueryCalled;
    private String deleteIndex;
    private QueryBuilder deleteQuery;
    private String expiresFieldName;
    private String documentUpdateIndex;

    @Override
    protected void setUp(TestInfo testInfo) throws Exception {
        super.setUp(testInfo);

     * @param failureReason the reason for failure ("no_results" or "no_relevant_results")
     * @param history the conversation history
     * @return a new query string, or the userMessage if regeneration fails
     */
    String regenerateQuery(String userMessage, String failedQuery, String failureReason, List<LlmMessage> history);

    /**
     * Generates an answer using document content (streaming version for enhanced flow).
     *

// NestedRelationName nested relationships like `Manager__Company`
func NestedRelationName(prefix, name string) string {
	return prefix + nestedRelationSplit + name
}

// SplitNestedRelationName Split nested relationships to `[]string{"Manager","Company"}`
func SplitNestedRelationName(name string) []string {
	return strings.Split(name, nestedRelationSplit)
}

     */
    protected void sendMail(final Map<String, String> infoMap) {
        final FessConfig fessConfig = ComponentUtil.getFessConfig();
        if (fessConfig.hasNotification()) {
            final Map<String, String> dataMap = new HashMap<>();
            for (final Map.Entry<String, String> entry : infoMap.entrySet()) {

        assertEscaping(xmlEscaper, "'", ch);
      } else if (shouldEscapeQuotes && ch == '"') {
        assertEscaping(xmlEscaper, """, ch);
      } else {
        String input = String.valueOf(ch);
        String escaped = xmlEscaper.escape(input);
        assertWithMessage("char 0x" + Integer.toString(ch, 16) + " should not be escaped")
            .that(escaped)
            .isEqualTo(input);
      }

                public void onPhaseStart(final String phase, final String phaseMessage) {
                    onPhaseStart(phase, phaseMessage, null);
                }

                @Override
                public void onPhaseStart(final String phase, final String phaseMessage, final String keywords) {
                    try {
                        final Map<String, Object> data = new HashMap<>();

     */
    @Size(max = 10)
    public String autoExpandReplicasForDoc = ComponentUtil.getFessConfig().getIndexAutoExpandReplicas();

    /**
     * The flag to load bulk data during config index rebuild.
     */
    @Size(max = 10)
    public String loadBulkData;

    /**
     * The flag to rebuild fess_config indices.
     */
    @Size(max = 10)
    public String rebuildConfigIndex = Constants.ON;

    /**

            }
        }
    }
}


class CapabilitySpec {
    lateinit var name: String

    private
    lateinit var providedBy: Set<String>

    private
    lateinit var selected: String

    private
    var upgrade: String? = null

    internal
    fun configure(components: ComponentMetadataHandler, configurations: ConfigurationContainer) {

    }

    // Test append method with String value
    @Test
    public void test_append_stringValue() {
        StringBuilder buf = new StringBuilder();
        Supplier<Object> supplier = () -> "test string";

        monitorTarget.append(buf, "stringKey", supplier);
        assertEquals("\"stringKey\":\"test string\"", buf.toString());
    }

    // Test append method with String containing special characters
    @Test

    public static final String ERROR_AUTH = "auth_error";

    /** Error code for service unavailable (HTTP 502/503). */
    public static final String ERROR_SERVICE_UNAVAILABLE = "service_unavailable";

    /** Error code for request timeout. */
    public static final String ERROR_TIMEOUT = "timeout";

    /** Error code for context length exceeded. */
    public static final String ERROR_CONTEXT_LENGTH_EXCEEDED = "context_length_exceeded";