// Arrange
        byte[] dst = new byte[100];
        int dstIndex = 0;

        // Act
        int result = response.writeParametersWireFormat(dst, dstIndex);

        // Assert
        assertEquals(0, result);
    }

    @Test
    @DisplayName("writeDataWireFormat should return 0")
    void testWriteDataWireFormat() {
        // Arrange
        byte[] dst = new byte[100];

        // Arrange & Act
        Handler handler = newHandler();
        URL url = new URL(null, spec, handler);

        // Assert
        assertEquals(expectedPort, url.getPort());
    }

    @Test
    @DisplayName("parseURL with null spec throws NullPointerException")
    void testParseURL_NullSpec() throws MalformedURLException {

     * 1. Basic constructor validation
     * --------------------------------------------------------------------- */
    @Test
    void constructorAcceptsNonNullObject() {
        // Arrange : create a dummy address
        InetAddress dummy = mock(InetAddress.class);
        // Act
        UniAddress ua = new UniAddress(dummy);
        // Assert

        testData = new byte[] { 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08 };
    }

    @Test
    @DisplayName("Test sign method with valid parameters")
    void testSignWithValidParameters() {
        // Arrange
        int offset = 0;
        int length = testData.length;

        // Act
        signingDigest.sign(testData, offset, length, request, response);

        // Assert

        // Arrange
        CIFSContext ctx = mock(CIFSContext.class);
        SmbTreeConnectionTrace trace = new SmbTreeConnectionTrace(ctx);

        // Act & Assert
        assertEquals(-1L, trace.getTreeId());
    }

    @Test
    @DisplayName("getConfig(): delegates to context")
    void getConfig_delegatesToContext() {
        // Arrange

            assertNull(context.getHashAlgos());
            assertNull(context.getSalt());
        }

        @Test
        @DisplayName("Should encode context correctly")
        void testEncode() {
            // Arrange
            context = new PreauthIntegrityNegotiateContext(mockConfig, testHashAlgos, testSalt);
            byte[] buffer = new byte[100];

            // Act
            int encodedSize = context.encode(buffer, 0);

    class ConstructorTests {

        @Test
        @DisplayName("Constructor with rpc.uuid_t should copy all fields correctly")
        void testConstructorWithRpcUuidT() {
            // Arrange
            rpc.uuid_t rpcUuid = new rpc.uuid_t();
            rpcUuid.time_low = TIME_LOW;
            rpcUuid.time_mid = TIME_MID;
            rpcUuid.time_hi_and_version = TIME_HI_AND_VERSION;

    @BeforeEach
    void setUp() {
        // Setup is handled by MockitoExtension
    }

    @Test
    void constructor_shouldOpenPolicySuccessfully() throws IOException {
        // Arrange
        String server = "testServer";
        int access = 123;

        // Mock the behavior of sendrecv for MsrpcLsarOpenPolicy2
        doAnswer(invocation -> {

        }
        return out;
    }

    @Test
    @DisplayName("getNTHash: known vector for 'password'")
    void testGetNTHash_knownVector() {
        // Arrange
        String password = "password";
        // Known NT hash for "password" (UTF-16LE MD4)
        // This is a well-known test vector: password -> 8846F7EAEE8FB117AD06BDD830B7586C

    @MethodSource("hexCases")
    @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");