}

    @Test
    @DisplayName("Constructor with null request should work")
    void testConstructorWithNullRequest() {
        // Test that null request is handled properly
        SmbNegotiation negotiationWithNullRequest = new SmbNegotiation(null, mockResponse, testRequestBuffer, testResponseBuffer);

        assertNull(negotiationWithNullRequest.getRequest());

        assertNotNull(result);
        // Content might be empty or contain minimal text depending on processing
        assertNotNull(result.getContent());
    }

    /**
     * Test that empty ZIP archive is handled gracefully.
     */
    public void test_ZipExtractor_emptyArchive_handlesGracefully() throws IOException {
        final ByteArrayOutputStream baos = new ByteArrayOutputStream();

        assertThrows(IOException.class, () -> sis.read());
    }

    @Test
    @DisplayName("Unknown packet type is handled by continuing to next packet")
    void unknownPacketTypeHandled() throws IOException {
        // According to the SocketInputStream implementation, unknown packet types
        // are handled in the switch statement's default case which continues the loop
        byte[] data = new byte[] { 1, 2 };

        final long elapsed = (System.nanoTime() - start) / 1000000;

        assertTrue("file:// URLs should not be delayed", elapsed < 50);
    }

    /**
     * Test that null URL queue is handled gracefully
     */
    public void test_nullUrlQueue() {
        final HostIntervalController controller = new HostIntervalController();
        controller.delayMillisBeforeProcessing = 1000L;

    public void test_init_withNullSessionId() {
        urlFilter.init(null);
        // Should handle null session ID gracefully
        assertNotNull(urlFilter);
    }

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

    /**

        this.retryDelayMs = retryDelayMs;
    }

    /**
     * Create error handler with default settings
     *
     * @param statistics statistics tracker
     */
    public RdmaErrorHandler(RdmaStatistics statistics) {
        this(statistics, 3, 1000); // 3 retries with 1 second delay
    }

    /**
     * Handle RDMA connection error and attempt recovery
     *

        assertEquals(expectedFlags, dfsRootEnum.getFlags());
    }

    @Test
    @DisplayName("Multiple server names should be handled correctly")
    void testDifferentServerNames() {
        // Test with different server names
        String[] serverNames = { "server1", "domain.local", "192.168.1.100", "FILESERVER" };

        URL url = new URL("gcs://mybucket/path/file%20with%20spaces.txt");
        Handler handler = new Handler();
        URLConnection conn = handler.openConnection(url);

        Handler.GcsURLConnection gcsConn = (Handler.GcsURLConnection) conn;

        assertEquals("mybucket", getField(gcsConn, "bucketName"));
        // URL decoding is handled by URL class

        assertTrue(rateLimiter.checkAttempt("user7", ip), "Should be allowed after manual unblock");
    }

    @Test
    public void testNullUsername() throws Exception {
        // Null username should be handled gracefully
        assertTrue(rateLimiter.checkAttempt(null, "192.168.1.8"), "Null username should be allowed");

        // Should not affect IP limiting
        rateLimiter.recordFailure(null, "192.168.1.8");

        // Next call should handle CIFSException and close iterator
        assertFalse(it.hasNext()); // After error, hasNext should return false

        // Assert
        verify(tree, times(1)).release();
    }

    @Test
    @DisplayName("close() closes when there is a next element and releases handle")
    void explicitClose() throws Exception {
        // Arrange