import jcifs.CIFSContext;
import jcifs.Configuration;
import jcifs.internal.witness.WitnessRegistration.WitnessRegistrationState;

/**
 * Unit tests for WitnessClient class using mocks.
 */
@ExtendWith(MockitoExtension.class)
public class WitnessClientTest {

    @Mock
    private CIFSContext mockContext;

    @Mock
    private Configuration mockConfig;

    @Mock

import java.nio.channels.spi.AbstractInterruptibleChannel;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.locks.LockSupport;
import junit.framework.TestCase;
import org.jspecify.annotations.NullUnmarked;
import org.jspecify.annotations.Nullable;

@NullUnmarked
@GwtIncompatible
@J2ktIncompatible

import java.nio.channels.spi.AbstractInterruptibleChannel;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.locks.LockSupport;
import junit.framework.TestCase;
import org.jspecify.annotations.NullUnmarked;
import org.jspecify.annotations.Nullable;

@NullUnmarked
@GwtIncompatible
@J2ktIncompatible

import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;
import java.util.concurrent.locks.ReadWriteLock;
import java.util.concurrent.locks.ReentrantReadWriteLock;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import jcifs.CIFSContext;
import jcifs.smb.SmbFile;

/**
 * SMB2/SMB3 Lease Manager
 *

    // Use ArgumentCaptor to capture the MsrpcSamrCloseHandle instance passed to sendrecv
    private ArgumentCaptor<MsrpcSamrCloseHandle> closeHandleCaptor;

    @BeforeEach
    void setUp() {
        // Initialize mocks and captors before each test
        MockitoAnnotations.openMocks(this);
        openDomainCaptor = ArgumentCaptor.forClass(MsrpcSamrOpenDomain.class);
        closeHandleCaptor = ArgumentCaptor.forClass(MsrpcSamrCloseHandle.class);

// A LRWMutex is a mutual exclusion lock with timeouts.
type LRWMutex struct {
	id          string
	source      string
	isWriteLock bool
	ref         int
	mu          sync.Mutex // Mutex to prevent multiple simultaneous locks
}

// NewLRWMutex - initializes a new lsync RW mutex.
func NewLRWMutex() *LRWMutex {
	return &LRWMutex{}
}

// Lock holds a write lock on lm.
//
// If the lock is already in use, the calling go routine

    }
}
```

### 4.3 Lease Manager
```java
package jcifs.internal.smb2.lease;

import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.locks.ReadWriteLock;
import java.util.concurrent.locks.ReentrantReadWriteLock;
import jcifs.CIFSContext;

public class LeaseManager {
    private final ConcurrentHashMap<Smb2LeaseKey, LeaseEntry> leases;

            fail("Failed to access servername field: " + e.getMessage());
        }
    }

    @Test
    void testGetEntriesWithMultipleShares() throws Exception {
        // Create real ShareInfo1 objects instead of mocks
        srvsvc.ShareInfo1 shareInfo1 = new srvsvc.ShareInfo1();
        shareInfo1.netname = "Share1";
        shareInfo1.type = 0;
        shareInfo1.remark = "Remark for Share1";

            // Given: Original value that fits in byte range
            int originalValue = 150;
            NdrShort ndrShort1 = new NdrShort(originalValue);

            // Create separate mocks for encoding and decoding to simulate real buffer
            NdrBuffer encodeBuffer = mock(NdrBuffer.class);
            NdrBuffer decodeBuffer = mock(NdrBuffer.class);

  integTestImplementation("org.junit.jupiter:junit-jupiter") {
    because 'allows to write and run Jupiter tests'
  }
  integTestImplementation("net.bytebuddy:byte-buddy:1.11.0") {
    because 'Generating dynamic mocks of internal libraries like JdkJarHell'
  }
  testRuntimeOnly("org.junit.vintage:junit-vintage-engine") {
    because 'allows JUnit 3 and JUnit 4 tests to run'
  }