fp = 0L;
    }

    /**
     * Reads a single byte from the file at the current file pointer position.
     *
     * @return the byte read as an integer (0-255), or -1 if end of file is reached
     * @throws SmbException if an I/O error occurs
     */
    public int read() throws SmbException {
        if (read(tmp, 0, 1) == -1) {
            return -1;
        }
        return tmp[0] & 0xFF;

    void testSessionLimitPreventsReuse() throws Exception {
        // Given: Config with session limit of 1
        when(config.getSessionLimit()).thenReturn(1);

        // Create first connection
        SmbTransportImpl first = pool.getSmbTransport(ctx, address, 445, false);

        // Mock that session limit is reached

        if (cleaned == 2) {
            assertNull(entry1);
            assertNull(leaseManager.getLease(key2));
        }
    }

    @Test
    @DisplayName("Should evict oldest leases when max limit reached")
    void testMaxLeaseEviction() throws InterruptedException {
        // Create a context with low max lease limit
        Configuration limitedConfig = mock(Configuration.class);

    /** The system cannot find the device specified */
    int NT_STATUS_NO_SUCH_DEVICE = 0xC000000e;
    /** The system cannot find the file specified */
    int NT_STATUS_NO_SUCH_FILE = 0xC000000f;
    /** End of file reached */
    int NT_STATUS_END_OF_FILE = 0xC0000011;
    /** More processing is required to complete this request */
    int NT_STATUS_MORE_PROCESSING_REQUIRED = 0xC0000016;
    /** Access is denied */

        method.setAccessible(true);
        final boolean result = (boolean) method.invoke(crawlerThread, 15);

        assertFalse(result);
    }

    /**
     * Test isContinue method when max access count is reached.
     */
    public void test_isContinue_maxAccessCountReached() throws Exception {
        crawlerContext.maxAccessCount = 10;
        crawlerContext.incrementAndGetAccessCount();

        // When/Then - Should retry for attempts 1 and 2
        assertTrue(exception.shouldRetry(1));
        assertTrue(exception.shouldRetry(2));
        assertFalse(exception.shouldRetry(3)); // Max attempts reached

        // Verify exponential backoff
        assertEquals(1000, exception.getRetryDelayMs(1));
        assertEquals(2000, exception.getRetryDelayMs(2));
        assertEquals(4000, exception.getRetryDelayMs(3));
    }

        jcifs.SID mockSid1 = mock(jcifs.SID.class);
        jcifs.SID mockSid2 = mock(jcifs.SID.class);
        when(mockSid1.unwrap(sid_t.class)).thenReturn(mockSidT);
        // Don't stub mockSid2 since it won't be reached due to NPE on null element
        testSids = new jcifs.SID[] { mockSid1, null, mockSid2 };

        // Act & Assert - This should throw an exception when LsarSidArrayX tries to process null

                    } catch (final SmbException e) {
                        if (e.getNtStatus() != 0xC0000011) {
                            throw e;
                        }
                        log.debug("Reached end of file", e);
                        n = -1;
                    }
                } else {
                    final SmbComReadAndX request = new SmbComReadAndX(th.getConfig(), fh.getFid(), this.fp, r, null);

                        } catch (final SmbException e) {
                            if (e.getNtStatus() == 0xC0000011) { // NT_STATUS_END_OF_FILE
                                log.debug("Reached end of file", e);
                                n = -1;
                            } else {
                                throw e;
                            }
                        }

                // If still at limit, throw exception
                if (this.connections.size() >= maxPoolSize) {
                    throw new IllegalStateException("Connection pool has reached maximum size of " + maxPoolSize
                            + ". Consider increasing pool size or closing idle connections.");
                }
            }
        }