// Exceptions
    // ------------------------------------------------------------------------

    public boolean hasExceptions() {
        return exceptions != null && !exceptions.isEmpty();
    }

    public List<Exception> getExceptions() {
        return exceptions == null ? Collections.emptyList() : Collections.unmodifiableList(exceptions);
    }

  }

  @Override
  public void tearDown() throws IOException {
    rootDir.getFileSystem().close();
  }

  public void testFileTraverser_emptyDirectory() throws Exception {
    assertThat(MoreFiles.fileTraverser().breadthFirst(rootDir)).containsExactly(rootDir);
  }

  public void testFileTraverser_nonExistingFile() throws Exception {
    Path file = rootDir.resolve("file-that-doesnt-exist");

import java.io.File;
import java.io.IOException;

/**
 * Tests for {@link Files#fileTraverser()}.
 *
 * @author Jens Nyman
 */

public class FilesFileTraverserTest extends IoTestCase {

  private File rootDir;

  @Override
  public void setUp() throws IOException {
    rootDir = createTempDir();
  }

  public void testFileTraverser_emptyDirectory() throws Exception {

  @Override
  protected void tearDown() {
    stack.runTearDown();
  }

  static final Exception EXCEPTION = new Exception();

  static class ExampleClassUnderTest {
    static final Logger logger = Logger.getLogger(ExampleClassUnderTest.class.getName());

    static void foo() {
      logger.log(Level.INFO, "message", EXCEPTION);
    }
  }

 *       will be thrown.
 *   <li>If no exceptions or errors were thrown in the try block, the <i>first</i> exception thrown
 *       by an attempt to close a resource will be thrown.
 *   <li>Any exception caught when attempting to close a resource that is <i>not</i> thrown (because
 *       another exception is already being thrown) is <i>suppressed</i>.
 * </ul>
 *

 *
 */
public class TokenizerTest {

    /**
     * @throws Exception
     */
    @Test
    public void testEOF() throws Exception {
        final Tokenizer tokenizer = new Tokenizer("");
        assertThat(tokenizer.nextToken(), is(Tokenizer.TT_EOF));
        assertThat(tokenizer.nextToken(), is(Tokenizer.TT_EOF));
    }

    /**
     * @throws Exception
     */
    @Test

    }

    /**
     * @throws Exception
     */
    @Test
    public void testIndexOf_character() throws Exception {
        final char[] array = new char[] { 'a', 'b', 'c' };
        assertThat(ArrayUtil.indexOf(array, 'a'), is(0));
        assertThat(ArrayUtil.indexOf(array, 'd'), is(-1));
    }

    /**
     * @throws Exception
     */
    @Test

Nehmen wir an, Sie haben eine benutzerdefinierte Exception `UnicornException`, die Sie (oder eine Bibliothek, die Sie verwenden) `raise`n könnten.

Und Sie möchten diese Exception global mit FastAPI handhaben.

import org.apache.maven.api.services.MavenException;

/**
 * Represents an exception that occurs during the parsing of Maven command-line arguments.
 * This exception is typically thrown when there are user errors in the command-line input,
 * such as invalid arguments or references to missing files. When this exception is thrown,
 * it indicates that the Maven execution should be stopped and the user should correct the issue.
 *
 * @since 4.0.0
 */

     * approach would be for each caller CAS it from null to a Set populated with its exception. But
     * there's another race: If the first thread fails with an exception and a second thread
     * immediately fails with the same exception:
     *
     * Thread1: calls setException(), which returns true, context switch before it can CAS
     * seenExceptions to its exception
     *