void testNullDecryptionKey() {
        // When/Then
        assertThrows(NullPointerException.class, () -> {
            new Smb2EncryptionContext(1, DialectVersion.SMB311, testEncryptionKey, null);
        }, "Should throw NullPointerException for null decryption key");
    }

    @Test
    @DisplayName("Should accept null dialect during construction")
    void testNullDialect() {
        // When/Then

                Arguments.of(new byte[] { 0x0A, 0x0B }, new byte[] { 0x0A, 0x0B }, 100L, true),
                // fid based equality (null fileId, same fid and tree id)
                Arguments.of(null, null, 200L, true));
    }

    @ParameterizedTest(name = "equals/hashCode consistent for treeId={2}")
    @MethodSource("equalsHashParams")

    }

    /**
     * Test null safety in comparisons
     */
    public void test_nullSafety() {
        CrawlerStatus status = CrawlerStatus.INITIALIZING;
        CrawlerStatus nullStatus = null;

        // Enum == null should be false
        assertFalse(status == nullStatus);
        assertFalse(status.equals(nullStatus));

        // null == Enum should be false

        if (data == null) {
            throw new CIFSException("Data cannot be null");
        }
        return compress(data, 0, data.length, algorithm);
    }

    @Override
    public byte[] compress(byte[] data, int offset, int length, int algorithm) throws CIFSException {
        if (data == null) {
            throw new CIFSException("Data cannot be null");
        }

   *
   * @throws IllegalArgumentException if the stream consists of two or more elements.
   * @throws NullPointerException if any element in the stream is {@code null}.
   * @return {@code Optional.of(onlyElement)} if the stream has exactly one element (must not be
   *     {@code null}) and returns {@code Optional.empty()} if it has none.
   */
  @SuppressWarnings("unchecked")
  public static <T> Collector<T, ?, Optional<T>> toOptional() {

    void constructor_shouldHandleNullServerSuccessfully() throws IOException {
        // Arrange
        String server = null;
        int access = 123;

        doAnswer(invocation -> {
            MsrpcLsarOpenPolicy2 rpc = invocation.getArgument(0);
            rpc.retval = 0; // Simulate success
            return null;
        }).when(mockDcerpcHandle).sendrecv(any(MsrpcLsarOpenPolicy2.class));

        // Act

        pathMappingHelper.setPathMappingList(sessionId, null);
        assertNull(pathMappingHelper.getPathMappingList(sessionId));
    }

    public void test_removePathMappingList_withNullSessionId() {
        pathMappingHelper.removePathMappingList(null);
    }

    public void test_getPathMappingList_withNullSessionId() {
        assertNull(pathMappingHelper.getPathMappingList(null));
    }

            final SmbFileFilter ff) throws SmbException {
        try (CloseableIterator<SmbResource> it = doEnum(root, wildcard, searchAttributes,
                fnf == null ? null : new ResourceNameFilterWrapper(fnf), ff == null ? null : new ResourceFilterWrapper(ff))) {

            final List<SmbFile> list = new ArrayList<>();
            while (it.hasNext()) {
                try (SmbResource n = it.next()) {

    }

    @Test
    @DisplayName("Test allowChain with null parameter")
    void testAllowChainWithNull() {
        // Given
        when(request.allowChain(null)).thenReturn(false);

        // When
        boolean result = request.allowChain(null);

        // Then
        assertFalse(result);
        verify(request, times(1)).allowChain(null);
    }

    @Test

      Path file = createFile();
      if (initialBytes != null) {
        java.nio.file.Files.write(file, initialBytes);
        return MoreFiles.asByteSink(file, StandardOpenOption.APPEND);
      }
      return MoreFiles.asByteSink(file);
    }

    @Override
    public byte[] getExpected(byte[] bytes) {
      if (initialBytes == null) {
        return checkNotNull(bytes);
      } else {