},
        "japanese_stop": {
          "type":       "stop",
          "stopwords_path": "${fess.dictionary.path}ja/stopwords.txt"
        },
        "korean_stop": {
          "type":       "stop",
          "stopwords_path": "${fess.dictionary.path}ko/stopwords.txt"
        },
        "latvian_stop": {
          "type":       "stop",
          "stopwords_path": "${fess.dictionary.path}lv/stopwords.txt"

                // Do nothing
            }

            @Override
            public void stop() {
                stopCallCount.incrementAndGet();
            }
        };

        // Execute stop multiple times
        dataStore.stop();
        dataStore.stop();
        dataStore.stop();

        assertEquals(3, stopCallCount.get());
    }

    @Test

        }

        try {
            dataIndexHelper.crawl("test-session-force-stop");
            assertTrue("Should exit quickly when force stopped", true);
        } catch (Exception e) {
            assertTrue("Force stop should handle exceptions quickly", true);
        }
    }

    @Test
    public void test_crawl_with_short_intervals() {
        try {

        response.setContent("Response content");
        response.setFinishReason("stop");
        response.setPromptTokens(100);
        response.setCompletionTokens(50);
        response.setTotalTokens(150);
        response.setModel("gpt-4");

        assertEquals("Response content", response.getContent());
        assertEquals("stop", response.getFinishReason());
        assertEquals(Integer.valueOf(100), response.getPromptTokens());

    // stop it.
    blockingCallable.waitForStart();

    // Give the second task a chance to (incorrectly) start up while the first task is running.
    assertThat(future2.isDone()).isFalse();

    // Stop the first task. The second task should then run.
    blockingCallable.stop();
    executor.shutdown();

    }

    /**
     * Test stop() method sets alive to false and is visible to other threads.
     */
    @Test
    public void test_stop_volatileVisibility() throws Exception {
        assertTrue(dataStore.alive);

        final boolean[] observedValues = new boolean[10];
        final Thread[] threads = new Thread[10];

        // Call stop() in main thread
        dataStore.stop();

    // stop it.
    blockingCallable.waitForStart();

    // Give the second task a chance to (incorrectly) start up while the first task is running.
    assertThat(future2.isDone()).isFalse();

    // Stop the first task. The second task should then run.
    blockingCallable.stop();
    executor.shutdown();

* Go to the "Debug" panel.
* "Add configuration...".
* Select "Python"
* Run the debugger with the option "`Python: Current File (Integrated Terminal)`".

It will then start the server with your **FastAPI** code, stop at your breakpoints, etc.

Here's how it might look:

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

---

If you use Pycharm, you can:

* Open the "Run" menu.
* Select the option "Debug...".

    stopwatch.start();
    assertThat(stopwatch.stop()).isSameInstanceAs(stopwatch);
    assertFalse(stopwatch.isRunning());
  }

  public void testStop_new() {
    assertThrows(IllegalStateException.class, stopwatch::stop);
    assertFalse(stopwatch.isRunning());
  }

  public void testStop_alreadyStopped() {
    stopwatch.start();
    stopwatch.stop();
    assertThrows(IllegalStateException.class, stopwatch::stop);

 * loader. That way, this class doesn't prevent the main class loader from getting garbage
 * collected, and this class can detect when the main class loader has been garbage collected and
 * stop itself.
 */
public class Finalizer implements Runnable {

  private static final Logger logger = Logger.getLogger(Finalizer.class.getName());

  /**