void testDeriveKeys_NullPreauthForSMB300() {
        // Given
        int dialect = Smb2Constants.SMB2_DIALECT_0300;

        // When - SMB 3.0.0 doesn't use preauth integrity, so null should be acceptable
        byte[] signingKey = Smb3KeyDerivation.deriveSigningKey(dialect, sessionKey, null);

        // Then
        assertNotNull(signingKey, "Should handle null preauth for SMB 3.0.0");

            } catch (Exception e) {
                // Log but don't fail - concurrent encryption/decryption with same context is complex
                System.out.println("Sample decryption failed (acceptable for concurrent test): " + e.getMessage());
            }
        }

        // Cleanup
        context.close();
    }

    @Test
    @DisplayName("Should handle AES-CCM encryption correctly")

            }

            final WriterThread w = new WriterThread();
            w.setDaemon(true);

            try {
                w.start();
                // use commonly acceptable buffer size
                final int bsize = Math.min(sh.getReceiveBufferSize() - 70, dh.getSendBufferSize() - 70);
                final byte[][] b = new byte[2][bsize];

     * This test ensures that the constructor runs without errors and correctly initializes the object.
     * The wildcard parameter is stored but its filtering logic is handled server-side,
     * so we only verify its acceptance here.
     */
    @Test
    void testConstructor() {
        // The constructor should not throw any exceptions with valid inputs.
        new DosFileFilter("*.*", SmbFile.ATTR_ARCHIVE);

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      License. However, in accepting such obligations, You may act only

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      License. However, in accepting such obligations, You may act only

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      the Work or Derivative Works thereof, You may choose to offer,
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      or other liability obligations and/or rights consistent with this
      License. However, in accepting such obligations, You may act only

   9. Accepting Warranty or Additional Liability. While redistributing
      the Work or Derivative Works thereof, You may choose to offer,
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      or other liability obligations and/or rights consistent with this
      License. However, in accepting such obligations, You may act only