// Create a mock exception that could have circular reference
            Exception rootCause = mock(Exception.class);
            when(rootCause.getMessage()).thenReturn("Mocked exception");

            TransportException exception = new TransportException("Test", rootCause);

            assertEquals(rootCause, exception.getRootCause());
            // toString should not cause infinite loop

- `opensearch/{index}/bsbhv/` - Base behaviors (do not edit)
- `opensearch/{index}/exbhv/` - Extended behaviors (customize here)

## Key Patterns

### Actions (Controllers)
- Located in `app.web.*` or `app.web.admin.*`
- Methods with `@Execute` are web endpoints
- DI via `@Resource` annotation
- `HtmlResponse` for JSP, `JsonResponse` for APIs

### Services
- Business logic in `app.service.*`

    @Mock
    Configuration mockCfg;

    // Provides a fresh handler instance for tests
    private Handler newHandler() {
        return new Handler();
    }

    // Provides a handler wired with a mocked CIFSContext
    private Handler newHandlerWith(CIFSContext ctx) {
        return new Handler(ctx);
    }

    @Test
    @DisplayName("getDefaultPort returns SMB default port")
    void testGetDefaultPort() {

        done = true;
        return super.getFile();
    }

    /**
     * Closes the stream and deletes the temporary file if it was not retrieved.
     * If an error occurs during file deletion, it is logged but not thrown to avoid
     * masking exceptions from the main operation.
     *
     * @throws IOException if an I/O error occurs during stream closure
     */
    @Override
    public void close() throws IOException {

    // keeping parsed request parameters, normal texts or uploaded files
    // keys are requested parameter names (treated as field name here)
    protected Map<String, Object> elementsAll; // lazy-loaded, then after not null
    protected Map<String, MultipartFormFile> elementsFile; // me too
    protected Map<String, String[]> elementsText; // me too

            throw new SQLRuntimeException(ex);
        }
    }

    /**
     * Closes the {@link Statement}.
     * <p>
     * If {@link Statement#close()} throws an exception, an error message is logged. The exception is not rethrown.
     * </p>
     *
     * @param statement
     *            {@link Statement}
     * @see Statement#close()
     */
    public static void close(final Statement statement) {

    /** Maximum multiplex count for concurrent requests */
    protected int maxMpxCount = SmbConstants.DEFAULT_MAX_MPX_COUNT;
    /** Send buffer size for SMB socket operations */
    protected int smbSendBufferSize = SmbConstants.DEFAULT_SND_BUF_SIZE;
    /** Receive buffer size for SMB socket operations */
    protected int smbRecvBufferSize = SmbConstants.DEFAULT_RCV_BUF_SIZE;
    /** Buffer size for SMB notification operations */

    }
    
    return null;  // No witness service found
}

private boolean isWitnessServiceAvailable(InetAddress address) {
    try (Socket socket = new Socket()) {
        socket.connect(new InetSocketAddress(address, 135), 5000);  // RPC endpoint
        return true;
    } catch (IOException e) {
        return false;
    }
}

    # o repsEnvType: (NotRequired - Default inherits or 'ut')
    #  The environment type of ReplaceSchema.
    #   e.g. if ut, data files in './playsql/data/ut/...' are loaded
    #  If DBFlute environment type is specified, inherits it as default.
    #
    #; repsEnvType = ut
    # - - - - - - - - - -/

    # /- - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

        if (extPos >= 0) {
            return path.substring(0, extPos);
        }
        return path;
    }

    /**
     * Returns the root directory where the class file of the specified class is located.
     *
     * @param clazz
     *            The class. Must not be {@literal null}.
     * @return The root directory.
     * @see #getBuildDir(String)
     */