// Test getEnvironment returns the correct environment
        Hashtable<String, String> env = ldapUser.getEnvironment();
        assertSame(testEnv, env);
        assertEquals("test.value", env.get("test.key"));

        // Test with empty environment
        Hashtable<String, String> emptyEnv = new Hashtable<>();
        LdapUser user = new LdapUser(emptyEnv, "user");
        assertTrue(user.getEnvironment().isEmpty());

  private @Nullable Throwable thrown;

  @VisibleForTesting
  Closer(Suppressor suppressor) {
    this.suppressor = checkNotNull(suppressor); // checkNotNull to satisfy null tests
  }

  /**
   * Registers the given {@code closeable} to be closed when this {@code Closer} is {@linkplain
   * #close closed}.
   *
   * @return the given {@code closeable}
   */

    private SmbFileOutputStream outputStream;

    @BeforeEach
    void setUp() {
        // Common setup for most tests
        lenient().when(mockFileHandle.getTree()).thenReturn(mockTreeHandle);
        lenient().when(mockTreeHandle.getConfig()).thenReturn(mockConfig);
    }

    @Test
    void testWriteSingleByte() throws IOException, CIFSException {
        // Given
        when(mockTreeHandle.isSMB2()).thenReturn(true);

        }
    }

    @Test
    public void testBlacklistPriority() throws Exception {
        // Add to both blacklist and whitelist
        validator.addToBlacklist("\\share\\test");
        validator.addToWhitelist("\\share\\test");

        // Blacklist should take priority
        try {
            validator.validatePath("\\share\\test\\file.txt");

        
        client.close();
    } finally {
        mockService.stop();
    }
}
```

### 7.2 Integration Tests
```java
@Test
@EnabledIfSystemProperty(named = "witness.test.enabled", matches = "true")
public void testWitnessFailover() throws Exception {
    // Requires cluster environment for testing
    CIFSContext context = getTestContext();

import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import junit.framework.Test;
import junit.framework.TestCase;
import junit.framework.TestSuite;
import org.jspecify.annotations.NullMarked;

/**
 * Tests for {@code EnumBiMap}.
 *
 * @author Mike Bostock
 * @author Jared Levy
 */
@J2ktIncompatible // EnumBimap
@GwtCompatible
@NullMarked

import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import org.jspecify.annotations.NullMarked;
import org.jspecify.annotations.Nullable;

/**
 * Tests for {@link Maps#transformValues} when the backing map's views have iterators that don't
 * support {@code remove()}.
 *
 * @author Jared Levy
 */
@GwtCompatible
@NullMarked

import jcifs.internal.CommonServerMessageBlockRequest;
import jcifs.internal.NotifyResponse;
import jcifs.internal.smb1.trans.nt.NtTransNotifyChange;
import jcifs.internal.smb2.notify.Smb2ChangeNotifyRequest;

/**
 * Tests for SmbWatchHandleImpl focusing on behavior and interactions.
 */
@ExtendWith(MockitoExtension.class)
class SmbWatchHandleImplTest {

    @Mock
    SmbFileHandleImpl handle;

    @Mock

import jcifs.internal.smb2.Smb2Constants;
import jcifs.internal.util.SMBUtil;

/**
 * Test class for Smb2TreeDisconnectRequest functionality
 */
@DisplayName("Smb2TreeDisconnectRequest Tests")
@ExtendWith(MockitoExtension.class)
class Smb2TreeDisconnectRequestTest {

    private static final short SMB2_TREE_DISCONNECT = 0x0004;

    @Test
    @DisplayName("Should create request with correct command type")

import jcifs.internal.smb2.ServerMessageBlock2;
import jcifs.internal.smb2.ServerMessageBlock2Response;
import jcifs.internal.util.SMBUtil;

/**
 * Test class for Smb2TreeDisconnectResponse functionality
 */
@DisplayName("Smb2TreeDisconnectResponse Tests")
class Smb2TreeDisconnectResponseTest extends BaseTest {

    private Configuration mockConfig;
    private Smb2TreeDisconnectResponse response;

    @BeforeEach