final ExtractData result = filenameExtractor.getText(in, params);

        assertNotNull(result);
        assertEquals("filename.txt", result.getContent());
        // Verify stream was not consumed
        assertEquals(testData.length, in.available());
    }

    /**
     * Test extraction with empty string filename.
     */
    public void test_getText_withEmptyFilename() {

        int pathConsumed = dr.getPathConsumed();
        if (pathConsumed < 0) {
            log.warn("Path consumed out of range " + pathConsumed);
            pathConsumed = 0;
        } else if (pathConsumed > this.unc.length()) {
            log.warn("Path consumed out of range " + pathConsumed);
            pathConsumed = oldUncPath.length();
        }

        if (log.isDebugEnabled()) {

        assertEquals(2, sis.read());

        // Read second message
        assertEquals(3, sis.read());
        assertEquals(4, sis.read());
        assertEquals(5, sis.read());

        // After all data is consumed, next read throws IOException
        assertThrows(IOException.class, () -> sis.read());
    }

    @Test
    @DisplayName("EOF handling when stream ends mid-header")

 * This class extends SmbException to provide DFS referral information when a DFS path is encountered.
 */
public class DfsReferral extends SmbException {

    /** Number of characters consumed from the path */
    public int pathConsumed;
    /** Time to live for this referral in seconds */
    public long ttl;
    /** Target server for this referral */
    public String server; // Server

/**
 * Job for purging expired thumbnail files from the system.
 * This job removes thumbnail files that have exceeded their configured expiration time
 * to prevent disk space from being consumed by old thumbnails.
 */
public class PurgeThumbnailJob {
    /** Logger instance for this class */
    private static final Logger logger = LogManager.getLogger(PurgeThumbnailJob.class);

    /**

- `validateInputStream()` method behavior
- Exception types and messages
- Stream consumption (should not consume)
- Consistency across multiple calls

**Test Count**: 11 tests

**Key Scenarios**:
- ✅ Validates non-null streams
- ✅ Throws CrawlerSystemException for null
- ✅ Called during getText execution
- ✅ Does not consume or modify stream
- ✅ Consistent behavior across multiple calls
- ✅ Works with various InputStream types

        // Verify
        assertEquals(expectedFilename, fileBothDirectoryInfo.getFilename());
    }

    @Test
    @DisplayName("Test decode returns correct bytes consumed")
    void testDecodeBytesConsumed() throws SMBProtocolDecodingException {
        // Prepare test data
        String filename = "testfile.txt";
        byte[] buffer = createValidBuffer(filename, "TESTFI~1.TXT", true);

            assertDoesNotThrow(() -> concreteImplementation.fixupDomain(domain));
        }

        @Test
        @DisplayName("Should strip path consumed")
        void testStripPathConsumed() {
            int consumedAmount = 5;

            // Test with mock
            doNothing().when(mockReferralData).stripPathConsumed(consumedAmount);

        if (ki < key.length()) {
            key = key.substring(0, ki);
        }

        /* Subtract the server and share from the pathConsumed so that
         * it refects the part of the relative path consumed and not
         * the entire path.
         */
        dr.pathConsumed -= 1 + server.length() + 1 + share.length();

        if (referrals != null && System.currentTimeMillis() + 10000 > referrals.expiration) {

        assertEquals("smb://dfs-server/dfs-share" + l.getUNCPath().replace('\\', '/'), l.getDfsPath());
        assertEquals("dfs-share", l.getShare());

        // Path consumed negative -> coerced to 0
        when(dr.getPathConsumed()).thenReturn(-1);
        String unc2 = l.handleDFSReferral(dr, null);
        assertTrue(unc2.contains("dfs/path") || unc2.contains("dfs\\path"));
    }