this(macSigningKey, bypass, 0);
    }

    /**
     * Constructs a signing digest with bypass option and initial sequence number
     *
     * @param macSigningKey
     *            The MAC signing key used for generating signatures
     * @param bypass
     *            Whether to bypass signature verification
     * @param initialSequence
     *            The initial sequence number for signing

    @Test
    @DisplayName("Test constructor with MAC signing key and bypass flag")
    void testConstructorWithBypass() {
        SMB1SigningDigest digest = new SMB1SigningDigest(testMacSigningKey, true);
        assertNotNull(digest);
        assertTrue(digest.toString().contains("MacSigningKey="));
    }

    @Test
    @DisplayName("Test constructor with MAC signing key, bypass flag and initial sequence")

 * authentication context without requiring users to explicitly enter credentials.
 *
 * The authenticator supports various configuration options including delegation,
 * basic authentication fallback, and localhost authentication bypass.
 */
public class SpnegoAuthenticator implements SsoAuthenticator {

    /** Logger for this class. */
    private static final Logger logger = LogManager.getLogger(SpnegoAuthenticator.class);

     */
    @Test
    public void testAuthTypeGuessing() {
        // Test guest detection
        NtlmPasswordAuthenticator guestAuth = new NtlmPasswordAuthenticator("guest", "anypass");
        assertTrue(guestAuth.isGuest());
        assertFalse(guestAuth.isAnonymous());

        // Test anonymous detection
        NtlmPasswordAuthenticator anonAuth = new NtlmPasswordAuthenticator("", new char[0]);

    void testHandleSetsNameAndPasswordHappyPath() throws Exception {
        JAASAuthenticator auth = new JAASAuthenticator("DOM", "user", "pass");
        NameCallback nc = new NameCallback("user:");
        PasswordCallback pc = new PasswordCallback("pass:", false);

        // Exercise callback handler with both callbacks supplied
        Callback[] cbs = new Callback[] { nc, pc };
        auth.handle(cbs);

```java
// Use with SLF4J (add slf4j-api dependency)
Logger logger = Logger.getLogger(MyClass.class);

// Use with Commons Logging (add commons-logging dependency)  
Logger logger = Logger.getLogger(MyClass.class);

// Use with Java Util Logging (built-in)
Logger logger = Logger.getLogger(MyClass.class.getName());
```

### Bean Copy Configuration
```java
// Configure bean copying behavior

        };

        networkExplorer.init(servletConfig);

        // Setup authentication
        NtlmPasswordAuthentication auth = new NtlmPasswordAuthentication(SingletonContext.getInstance(), "DOMAIN", "user", "pass");
        when(session.getAttribute("npa-workgroup")).thenReturn(auth);
        when(request.getPathInfo()).thenReturn("/workgroup/server/share/");

        networkExplorer.doGet(request, response);

        ASN1ObjectIdentifier unsupported = new ASN1ObjectIdentifier("1.2.3.4.5");
        byte[] init = spnegoInitWithMechs(unsupported);

        // Host is a FQDN to pass the short-name check
        SmbUnsupportedOperationException ex =
                assertThrows(SmbUnsupportedOperationException.class, () -> auth.createContext(tc, null, "server.example.com", init, false));

    @Rule
    public ExpectedException exception = ExpectedException.none();

    /**
     * @throws Exception
     */
    @Test
    public void testCopy_BeanToBean() throws Exception {
        final MyClass src = new MyClass();
        src.setAaa("111");
        src.setCcc("333");

        final MyClass2 dest = new MyClass2();
        dest.setAaa("aaa");
        dest.setBbb("bbb");
        dest.setDdd("ddd");

            verify(mockRenewableCredentials, never()).renew(); // Ensure renewable path was not taken
        }
    }

    @Test
    @DisplayName("Should pass SmbAuthException to NtlmAuthenticator.requestNtlmPasswordAuthentication")
    void testRenewCredentials_WithSmbAuthException() {
        SmbAuthException mockSmbAuthException = mock(SmbAuthException.class);