// Arrange
            long expectedLength = 1024L;
            doReturn(expectedLength).when(smbFile).length();

            // Act & Assert
            assertEquals(expectedLength, smbFile.length());
        }

        @Test
        void testLastModified() throws SmbException {
            // Arrange
            long expectedTime = System.currentTimeMillis();

 * This exception indicates that the requested search functionality is not available or supported.
 */
public class UnsupportedSearchException extends FessSystemException {

    private static final long serialVersionUID = 1L;

    /**
     * Constructs a new UnsupportedSearchException with the specified message.
     *
     * @param msg the exception message
     */

import java.io.IOException;

/**
 * Exception that wraps {@link IOException}.
 *
 * @author higa
 */
public class IORuntimeException extends ClRuntimeException {

    private static final long serialVersionUID = 1533554330702215389L;

    /**
     * Creates a {@link IORuntimeException}.
     *
     * @param cause
     *            The cause of the exception
     */

import javax.naming.NamingException;

/**
 * Exception that wraps {@link NamingException}.
 *
 * @author higa
 */
public class NamingRuntimeException extends ClRuntimeException {

    private static final long serialVersionUID = -3176447530746274091L;

    /**
     * Creates a {@link NamingRuntimeException}.
     *
     * @param cause
     *            The cause of the exception
     */

/**
 * Exception that wraps {@link NoSuchPaddingException}.
 *
 * @author shinsuke
 */
public class NoSuchPaddingRuntimeException extends ClRuntimeException {

    private static final long serialVersionUID = -3176447530746274091L;

    /**
     * Creates a {@link NoSuchPaddingRuntimeException}.
     *
     * @param cause the underlying exception
     */

  /** Creates a new instance with the given cause. */
  public ComputationException(@Nullable Throwable cause) {
    super(cause);
  }

  @GwtIncompatible @J2ktIncompatible private static final long serialVersionUID = 0;

      throws InterruptedException, ExecutionException {
    return future.blockingGet();
  }

  static <V extends @Nullable Object> V get(AbstractFuture<V> future, long timeout, TimeUnit unit)
      throws InterruptedException, ExecutionException, TimeoutException {
    return future.blockingGet(timeout, unit);
  }

  private Platform() {}

  /** Creates a new instance with the given cause. */
  public ComputationException(@Nullable Throwable cause) {
    super(cause);
  }

  @GwtIncompatible @J2ktIncompatible private static final long serialVersionUID = 0;

     */
    public SMBSignatureValidationException(final String msg) {
        super(msg);
    }

    /**
     *
     */
    private static final long serialVersionUID = 2283323396289696982L;

接著它會用你的 **FastAPI** 程式碼啟動伺服器、在你的中斷點停下等。

可能會長這樣：

<img src="/img/tutorial/debugging/image01.png">

---

如果你使用 PyCharm，你可以：

* 開啟 "Run" 選單
* 選擇 "Debug..."
* 會出現一個情境選單
* 選擇要偵錯的檔案（此例為 `main.py`）

接著它會用你的 **FastAPI** 程式碼啟動伺服器、在你的中斷點停下等。

可能會長這樣：