public static void resetInstanceCount() {
            instanceCount = 0;
        }
    }

    /**
     * Closeable test component for testing AutoCloseable resource handling
     */
    public static class CloseableTestComponent implements AutoCloseable {
        private static AtomicInteger instanceCounter = new AtomicInteger(0);
        private static AtomicInteger closeCounter = new AtomicInteger(0);

        assertNotNull(outputStream);

        // Verify the AutoCloseable resources were closed
        verify(autoCloseableMockTreeHandle).close();
        verify(autoCloseableMockFileHandle).close();
    }

    @Test
    void testConstructorWithAppendFlag() throws IOException, CIFSException {
        // Given
        // Mock the AutoCloseable tree handle behavior

        final String resourceType;
        final WeakReference<AutoCloseable> resourceRef;
        final PhantomReference<AutoCloseable> phantomRef;
        final long creationTime;
        final StackTraceElement[] allocationStackTrace;
        volatile boolean closed;

        ResourceHolder(String resourceId, AutoCloseable resource, ReferenceQueue<AutoCloseable> queue) {
            this.resourceId = resourceId;

class SmbSessionTest {

    @Nested
    @DisplayName("AutoCloseable Contract Tests")
    class AutoCloseableContractTest {

        @Test
        @DisplayName("Should implement AutoCloseable interface")
        void shouldImplementAutoCloseable() {
            assertTrue(AutoCloseable.class.isAssignableFrom(SmbSession.class), "SmbSession should implement AutoCloseable interface");
        }

        @Test

        assertNotNull(passwordArray);
        assertArrayEquals("TestPass123!".toCharArray(), passwordArray);
    }

    /**
     * Test AutoCloseable implementation
     */
    @Test
    @DisplayName("Test AutoCloseable with try-with-resources")
    public void testAutoCloseable() {
        char[] testPassword = "AutoClosePass123!".toCharArray();

- `AtomicLong` for counters (`CrawlerContext.accessCount`)
- `volatile` for status flags
- Synchronized blocks for critical sections
- Thread-local storage via `CrawlingParameterUtil`

**Resource Management**:
- `AutoCloseable` throughout
- `DeferredFileOutputStream` for large responses (temp files for >1MB)
- Connection pooling with limits
- Background temp file deletion via `FileUtil.deleteInBackground()`

**Fault Tolerance**:

    class InterfaceContractTests {

        @Test
        @DisplayName("SmbResource should extend AutoCloseable")
        void testInterfaceInheritance() {
            // Then
            assertTrue(AutoCloseable.class.isAssignableFrom(SmbResource.class), "SmbResource should extend AutoCloseable");
        }

        @Test
        @DisplayName("SmbResource should have all required methods")

        assertTrue(emptyIterator instanceof Iterator, "Should implement Iterator");
        assertTrue(emptyIterator instanceof AutoCloseable, "Should implement AutoCloseable");
    }

    @Test
    @DisplayName("hasNext should always return false")
    void testHasNextAlwaysReturnsFalse() {
        // When & Then

    /**
     * Close the tree connection (implements AutoCloseable)
     *
     * This method provides a standard way to close resources using try-with-resources.
     * It delegates to the release() method to properly clean up the connection.
     */
    @Override
    public void close() {
        if (log.isDebugEnabled()) {
            log.debug("Closing SmbTreeConnection via AutoCloseable.close()");
        }
        release();

 * including adding URLs to the queue, filtering URLs, managing crawler threads,
 * and handling the overall crawling lifecycle.
 *
 * <p>It implements the Runnable interface to be executed in a separate thread,
 * and the AutoCloseable interface to ensure resources are properly released after use.
 *
 * <p>The crawler uses several services and components, such as UrlQueueService, DataService,