@DisplayName("Edge and invalid inputs")
    class EdgeCases {

        @Test
        @DisplayName("read(null) throws NullPointerException")
        void readNullArrayThrows() throws Exception {
            SmbFileInputStream in = newStream();
            assertThrows(NullPointerException.class, () -> in.read(null));
        }

        @Test
        @DisplayName("readDirect with len <= 0 returns 0")

        infoField.setAccessible(true);
        infoField.set(msrpcShareGetInfo, null);

        // This should throw NullPointerException
        assertThrows(NullPointerException.class, () -> {
            msrpcShareGetInfo.getSecurity();
        });
    }

    @Test
    void testInheritedFields() throws Exception {

        });
    }

    @Test
    @DisplayName("Should handle null nonce")
    void testNullNonce() {
        // When/Then
        assertThrows(NullPointerException.class, () -> {
            transformHeader.setNonce(null);
        });
    }

    @Test
    @DisplayName("Should handle invalid nonce length")
    void testInvalidNonceLength() {
        // Given

        Smb2CloseRequest requestWithNull = new Smb2CloseRequest(mockConfig, null, testFileName);
        byte[] buffer = new byte[256];

        // Should throw NullPointerException when trying to copy null array
        assertThrows(NullPointerException.class, () -> {
            requestWithNull.writeBytesWireFormat(buffer, 0);
        });
    }

    @Test
    @DisplayName("readBytesWireFormat should return 0")

        ace.allow = true;
        ace.access = 0x001200A9;
        ace.flags = 0x00;
        ace.sid = null;

        // This should throw NullPointerException as the current implementation doesn't handle null SID
        assertThrows(NullPointerException.class, () -> ace.toString());
    }

    @Test
    @DisplayName("Test decode creates new SID instance")
    void testDecodeCreatesNewSID() {

        assertThrows(NullPointerException.class,
                () -> new SmbFileHandleImpl(cfg, new byte[] { 1, 2 }, null, "//server/share", 0, 0, 0, 0, 0L));
    }

    @Test
    @DisplayName("Constructor with null cfg throws NPE")
    void constructor_nullCfg_throwsNPE() {
        stubValidTree(7L, true, true);

    @Test
    @DisplayName("Test getInfo with class when info is null throws NullPointerException")
    void testGetInfoWithClassWhenInfoIsNull() {
        response = new Smb2QueryInfoResponse(mockConfig, (byte) 1, (byte) 2);

        assertThrows(NullPointerException.class, () -> response.getInfo(FileInternalInfo.class),
                "Should throw NullPointerException when info is null");
    }

    @Test

    void testNullMaximumVersion() {
        // Given
        when(mockConfig.getMaximumVersion()).thenReturn(null);

        // When/Then - Should throw NPE based on actual implementation
        assertThrows(NullPointerException.class, () -> {
            new Smb2NegotiateRequest(mockConfig, 0);
        });
    }

    @Test
    @DisplayName("Should properly align buffer writes")
    void testBufferAlignment() {

        // Arrange
        SmbBasicFileInfo info = null;

        // Act & Assert: attempting to call any method on null should throw NPE
        Assertions.assertThrows(NullPointerException.class, () -> {
            // Intentionally dereference null to validate exception behavior
            // This checks that callers must handle null references defensively
            info.getSize();
        });

        assertTrue(conn instanceof SmbFile);
    }

    @Test
    @DisplayName("openConnection throws NPE for null URL")
    void testOpenConnectionWithNullUrl() {
        // Act & Assert
        assertThrows(NullPointerException.class, () -> handler.openConnection(null));
    }

    @Test
    @DisplayName("URL created with handler parses SMB URL correctly")
    void testUrlCreationWithHandler() throws Exception {