@DisplayName("toString() renders lower-case hex with zero-padding")
    void toString_rendersHex(byte[] input, String expected) {
        // Arrange
        SecurityBlob blob = new SecurityBlob(input);

        // Act
        String actual = blob.toString();

        // Assert
        assertEquals(expected, actual, "Hex string should match expected format");
    }

 */
final class TransWaitNamedPipeResponseTest {

    /**
     * Verify that the default constructor creates an instance.
     */
    @Test
    void constructorInitialisesInstance() {
        // Arrange & Act
        TransWaitNamedPipeResponse resp = new TransWaitNamedPipeResponse();
        // Assert
        assertNotNull(resp, "Instance should not be null");
    }

    /**

        void doShareEnum_invalidPath_throws(String url, String pathSuffix, boolean expectDirSlashMsg) throws Exception {
            // Arrange
            SmbFile parent = new SmbFile(url);

            // Act + Assert
            SmbException ex = assertThrows(SmbException.class, () -> SmbEnumerationUtil.doShareEnum(parent, "*", 0, null, null));

            // Assert message indicates which validation failed

    @Test
    @DisplayName("byte[] ctor: empty token throws PACDecodingException with clear message")
    void byteArrayConstructor_emptyToken_throws() {
        // Arrange
        byte[] empty = new byte[0];

        // Act + Assert
        PACDecodingException ex = assertThrows(PACDecodingException.class, () -> new KerberosApRequest(empty, new KerberosKey[0]));
        assertTrue(ex.getMessage().contains("Empty kerberos ApReq"));
    }

    @Test

    @Test
    @DisplayName("Default ctor: null message/cause and success status")
    void defaultConstructor_hasNullMessageAndCause_andDefaultStatus() {
        // Arrange & Act
        SMBSignatureValidationException ex = new SMBSignatureValidationException();

        // Assert
        assertNull(ex.getMessage(), "Default ctor should not set a message");

class SmbEndOfFileExceptionTest {

    /**
     * Verifies the no-arg constructor sets the expected message, status, and no cause.
     */
    @Test
    void defaultConstructorSetsMessageAndStatus() {
        // Arrange & Act
        SmbEndOfFileException ex = new SmbEndOfFileException();

        // Assert
        assertEquals("Unexpectedly reached end of file", ex.getMessage(), "Default message must match");

        return Stream.of(Arguments.of(anon), Arguments.of(mock));
    }

    @Test
    @DisplayName("Class is a public interface in expected package")
    void testPublicInterfaceAndPackage() {
        // Arrange & Act
        Class<SessionSetupHandler> clazz = SessionSetupHandler.class;

        // Assert
        assertTrue(clazz.isInterface(), "Should be an interface");

            boolean expectNew) {
        // Arrange: create an implementation instance
        SmbRenewableCredentials impl = supplier.get();

        // Act: call renew
        CredentialsInternal renewed = impl.renew();

        // Assert: verify behavior based on scenario
        if (expectSame) {

    void defaultConstructor_producesRequiredKrb5EntryWithEmptyOptions() {
        // Arrange
        StaticJAASConfiguration cfg = new StaticJAASConfiguration();

        // Act
        AppConfigurationEntry[] entries = cfg.getAppConfigurationEntry("ignored");

        // Assert
        assertNotNull(entries, "Entries array should not be null");

        assertEquals(0, transport.getNumSessions());

        // Act: create new session (happy path)
        SmbSessionImpl s1 = transport.getSmbSession(ctx);
        assertNotNull(s1);
        assertEquals(1, transport.getNumSessions());
        s1.close();

        // Act: request again with same context -> reuse existing
        SmbSessionImpl s2 = transport.getSmbSession(ctx);