@Test
        @DisplayName("toString with valid data produces expected format")
        void testToStringWithValidData() {
            byte[] challenge = new byte[] { (byte) 0x01, (byte) 0x02, (byte) 0x03, (byte) 0xFF };
            UniAddress dc = mock(UniAddress.class);
            when(dc.toString()).thenReturn("SERVER123");

            NtlmChallenge nc = new NtlmChallenge(challenge, dc);
            String result = nc.toString();

    }

    /**
     * {@inheritDoc}
     *
     * @see jcifs.internal.TreeConnectResponse#isValidTid()
     */
    @Override
    public boolean isValidTid() {
        return getTid() != 0xFFFF;
    }

    @Override
    protected int writeParameterWordsWireFormat(final byte[] dst, final int dstIndex) {
        return 0;
    }

    @Override

    int readRDataWireFormat(final byte[] src, int srcIndex) {
        final int start = srcIndex;
        numberOfNames = src[srcIndex] & 0xFF;
        final int namesLength = numberOfNames * 18;
        final int statsLength = rDataLength - namesLength - 1;
        numberOfNames = src[srcIndex] & 0xFF;
        srcIndex++;
        // gotta read the mac first so we can populate addressArray with it

    void testEncode() {
        byte[] testBytes = new byte[] { 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, (byte) 0x88, (byte) 0x99, (byte) 0xAA, (byte) 0xBB,
                (byte) 0xCC, (byte) 0xDD, (byte) 0xEE, (byte) 0xFF, 0x00 };

        Smb2LeaseKey key = new Smb2LeaseKey(testBytes);
        byte[] buffer = new byte[20];

        key.encode(buffer, 2);

        for (int i = 0; i < 16; i++) {

        assertTrue(messageBytes.length >= 12);
        // Message type should be 1 (little endian)
        assertEquals(1, messageBytes[8] & 0xFF);
        assertEquals(0, messageBytes[9] & 0xFF);
        assertEquals(0, messageBytes[10] & 0xFF);
        assertEquals(0, messageBytes[11] & 0xFF);
    }

    @Test
    @DisplayName("Should handle Unicode negotiation flag")
    void testUnicodeNegotiation() {
        // Given

		// data bytes and treat the value as an unsigned number.
		var inv byte // 0x00 if positive or zero, 0xff if negative
		if b[0]&0x40 != 0 {
			inv = 0xff
		}

		var x uint64
		for i, c := range b {
			c ^= inv // Inverts c only if inv is 0xff, otherwise does nothing
			if i == 0 {
				c &= 0x7f // Ignore signal bit in first byte
			}
			if (x >> 56) > 0 {

        assertEquals(0, response.getCommand());

        // Verify we can change the subcommand
        response.setSubCommand((byte) 0xFF);
        assertEquals((byte) 0xFF, response.getSubCommand());

        // But creating a new instance should have the correct subcommand
        Trans2SetFileInformationResponse newResponse = new Trans2SetFileInformationResponse(config);

        void testMockImplementation() {
            NegotiateContextRequest mockRequest = mock(NegotiateContextRequest.class);
            when(mockRequest.getContextType()).thenReturn(0xFF);

            assertEquals(0xFF, mockRequest.getContextType());
            verify(mockRequest).getContextType();
        }
    }

    @Nested
    @DisplayName("Edge Cases and Error Conditions")
    class EdgeCasesTests {

    public void testSupportedHashAlgorithms() {
        assertTrue(preauthService.isHashAlgorithmSupported(PreauthIntegrityService.HASH_ALGO_SHA512));
        assertFalse(preauthService.isHashAlgorithmSupported(0xFF)); // Unsupported

        int[] supported = preauthService.getSupportedHashAlgorithms();
        assertNotNull(supported);
        assertEquals(1, supported.length);

        // entities. Use A as a temp var.
        for (int i = 0; i < 16; i++) {
            X[i] = block[offset++] & 0xFF | (block[offset++] & 0xFF) << 8 | (block[offset++] & 0xFF) << 16 | (block[offset++] & 0xFF) << 24;
        }

        int A = context[0];
        int B = context[1];
        int C = context[2];
        int D = context[3];