final Throwable[] causes = mcae.getCauses();
                if (causes.length > 0) {
                    t = causes[causes.length - 1];
                }
            }

            String errorName;
            final Throwable cause = t.getCause();
            if (cause != null) {
                errorName = cause.getClass().getCanonicalName();
            } else {

REM FESS_JAVA_OPTS=%FESS_JAVA_OPTS% -Djavax.net.ssl.trustStore=/tech/elastic/config/truststore.jks
REM FESS_JAVA_OPTS=%FESS_JAVA_OPTS% -Djavax.net.ssl.trustStorePassword=changeit

REM Causes the JVM to dump its heap on OutOfMemory.
REM set FESS_JAVA_OPTS=%FESS_JAVA_OPTS% -XX:+HeapDumpOnOutOfMemoryError
REM The path to the heap dump location, note directory must exists and have enough
REM space for a full heap dump.

        assertTrue(bulkLine.contains("reading2"));
    }

    @Test(expected = SuggesterException.class)
    public void testCreateBulkLineWithNullItem() {
        // Test that null item causes exception
        SuggestUtil.createBulkLine("test_index", "_doc", null);
    }

    @Test
    public void testCreateDefaultReadingConverter() {
        // Test creating default reading converter

FESS_JAVA_OPTS="$FESS_JAVA_OPTS -Dlog4j2.disable.jmx=true"
FESS_JAVA_OPTS="$FESS_JAVA_OPTS -Dlog4j2.formatMsgNoLookups=true"
FESS_JAVA_OPTS="$FESS_JAVA_OPTS -Dlog4j.skipJansi=true"

# Causes the JVM to dump its heap on OutOfMemory.
#FESS_JAVA_OPTS="$FESS_JAVA_OPTS -XX:+HeapDumpOnOutOfMemoryError"
# The path to the heap dump location, note directory must exists and have enough
# space for a full heap dump.

    }

    /**
     * Builds a comprehensive error message from a throwable and its causes.
     * This method traverses the cause chain and concatenates all error messages.
     *
     * @param t the throwable to build message from
     * @return a string containing all error messages in the cause chain
     */
    protected String buildThrowableMessage(final Throwable t) {

- TextExtractor

**Test Count**: 8 tests

**Key Scenarios**:
- ✅ Successful extraction closes resources properly
- ✅ Failed extraction includes descriptive error messages
- ✅ Null input stream validation
- ✅ Error messages include file type context

---

### 2. FilenameExtractorEnhancedTest.java
**Purpose**: Test FilenameExtractor edge cases and new documentation.

**Key Test Areas**:
- Parameter handling (null, empty, missing)

     * The abort flag is set to false by default.
     *
     * @param url the URL where the crawling error occurred
     * @param message the error message
     * @param cause the underlying exception that caused this error
     */
    public DataStoreCrawlingException(final String url, final String message, final Throwable cause) {
        this(url, message, cause, false);
    }

     * @param message The detailed error message explaining the cause of the exception
     */
    public SsoProcessException(final String message) {
        super(message);
    }

    /**
     * Constructs a new SSO process exception with the specified detailed message and cause.
     *
     * @param message The detailed error message explaining the cause of the exception
     * @param cause The underlying exception that caused this SSO process exception

    /**
     * Constructs a new SsoLoginException with the specified detail message and cause.
     *
     * @param message The detail message explaining the SSO login failure
     * @param cause The underlying exception that caused this SSO login failure
     */
    public SsoLoginException(final String message, final Throwable cause) {
        super(message, cause);
    }

        for (final BooleanClause clause : booleanQuery.clauses()) {
            final QueryBuilder queryBuilder = getQueryProcessor().execute(context, clause.query(), boost);
            if (queryBuilder != null) {
                switch (clause.occur()) {
                case MUST:
                    boolQuery.must(queryBuilder);
                    break;
                case SHOULD: