@BeforeEach
    public void setUp() {
        validator = new ServerResponseValidator();
    }

    @Test
    public void testValidBuffer() throws Exception {
        byte[] buffer = new byte[1024];
        validator.validateBuffer(buffer, 100, 2048);
        // Should pass without exception
    }

    @Test
    public void testNullBuffer() throws Exception {

        void shouldReturnTrueForValidIpAddresses(String ip) {
            assertTrue(UniAddress.isDotQuadIP(ip));
        }

        @ParameterizedTest(name = "should return false for invalid IP address or hostname: {0}")
        @ValueSource(strings = { "192.168.1", "hostname", "1.2.3.4.5", "192.168.1.1a", "a.b.c.d" })
        void shouldReturnFalseForInvalidIpAddressesOrHostnames(String input) {

        @Test
        void testGetCanonicalPath() {
            // Act & Assert
            assertEquals("smb://localhost/share/file.txt", smbFile.getCanonicalPath());
        }

        @Test
        void testGetServer() {
            // Act & Assert
            assertEquals("localhost", smbFile.getServer());
        }

        @Test
        void testGetShare() {
            // Act & Assert

        }

        public void setBytesWritten(int bytes) {
            this.bytesWritten = bytes;
        }

        public void setBytesRead(int bytes) {
            this.bytesRead = bytes;
        }

        public void setThrowOnRead(boolean throwOnRead) {
            this.throwOnRead = throwOnRead;
        }
    }

    @BeforeEach
    void setUp() {
        MockitoAnnotations.openMocks(this);

  // retainAll(empty)

  @CollectionFeature.Require(SUPPORTS_REMOVE)
  @CollectionSize.Require(ZERO)
  public void testRetainAll_emptyPreviouslyEmpty() {
    expectReturnsFalse(empty);
    expectUnchanged();
  }

  @CollectionFeature.Require(absent = SUPPORTS_REMOVE)
  @CollectionSize.Require(ZERO)
  public void testRetainAll_emptyPreviouslyEmptyUnsupported() {
    expectReturnsFalseOrThrows(empty);
    expectUnchanged();

    @Mock
    private CommonServerMessageBlock serverMessageBlock;

    @Mock
    private Response response;

    @BeforeEach
    void setUp() {
        MockitoAnnotations.openMocks(this);
    }

    @Test
    @DisplayName("Test isValid returns true for valid negotiation")
    void testIsValidReturnsTrue() {
        // Arrange
        when(negotiationResponse.isValid(cifsContext, negotiationRequest)).thenReturn(true);

        }

        // Test control methods
        public void setState(int state) {
            this.state = state;
        }

        public void setPeekedKey(Long key) {
            this.peekedKey = key;
        }

        public void setSendException(IOException e) {
            this.sendException = e;
        }

        public void setRecvException(IOException e) {
            this.recvException = e;

        void testSmb2HeaderLength() {
            assertEquals(64, Smb2Constants.SMB2_HEADER_LENGTH, "SMB2 header must be exactly 64 bytes");
        }
    }

    @Nested
    @DisplayName("Negotiation Constants")
    class NegotiationConstants {

        @Test
        @DisplayName("Signing enabled flag should be 0x0001")
        void testSigningEnabledFlag() {

        assertEquals(0, response.serverFid);
    }

    @Test
    void testSetFid() {
        response.fid = 123;
        assertEquals(123, response.fid);
    }

    @Test
    void testSetFileAttributes() {
        response.fileAttributes = 0x20; // ATTR_ARCHIVE
        assertEquals(0x20, response.fileAttributes);
    }

    @Test
    void testSetLastWriteTime() {
        long time = System.currentTimeMillis();

    private SID mockDomainSid;

    private String testServerName;
    private SID[] testSids;

    @BeforeEach
    void setUp() {
        testServerName = "test-server.domain.com";
        testSids = new SID[] { mockSid1, mockSid2, mockSid3 };
    }

    // Test resolveSids with array
    @Test
    void testResolveSids_Success() throws CIFSException {