@BeforeEach
    void setUp() {
        handler = new Handler();
    }

    @Nested
    @DisplayName("Constructor Tests")
    class ConstructorTests {

        @Test
        @DisplayName("Should create handler with default constructor")
        void testDefaultConstructor() {
            // When
            Handler testHandler = new Handler();

            // Then
            assertNotNull(testHandler);

        String dir1 = "/test/dir1";
        String dir2 = "/test/dir2";
        String dir3 = "/test/dir3";

        Smb2LeaseKey key1 = new Smb2LeaseKey();
        Smb2LeaseKey key2 = new Smb2LeaseKey();
        Smb2LeaseKey key3 = new Smb2LeaseKey();

        when(baseLeaseManager.requestLease(dir1, DirectoryLeaseState.DIRECTORY_READ_HANDLE)).thenReturn(key1);

                Map<Object, Plugin> master = new LinkedHashMap<>(src.size() * 2);

                for (Plugin element : src) {
                    if (element.isInherited() || !element.getExecutions().isEmpty()) {
                        // NOTE: Enforce recursive merge to trigger merging/inheritance logic for executions
                        Plugin plugin = new Plugin();

      checkArgument(!Double.isNaN(slope));
      if (isFinite(slope)) {
        double yIntercept = y1 - x1 * slope;
        return new RegularLinearTransformation(slope, yIntercept);
      } else {
        return new VerticalLinearTransformation(x1);
      }
    }
  }

  /**
   * Builds an instance representing a vertical transformation with a constant value of {@code x}.

    this.nameFormat = nameFormat;
    return this;
  }

  /**
   * Sets daemon or not for new threads created with this ThreadFactory.
   *
   * <p><b>Java 21+ users:</b> use {@link Thread.Builder.OfPlatform#daemon(boolean)} instead.
   *
   * @param daemon whether or not new Threads created with this ThreadFactory will be daemon threads
   * @return this for the builder pattern
   */

      try {
        try {
          urls.add(new File(entry).toURI().toURL());
        } catch (SecurityException e) { // File.toURI checks to see if the file is a directory
          urls.add(new URL("file", null, new File(entry).getAbsolutePath()));
        }
      } catch (MalformedURLException e) {
        throw new AssertionError("malformed class path entry: " + entry, e);
      }
    }

        super.setUp(testInfo);
        authenticator = new OpenIdConnectAuthenticator();
        final File propFile = File.createTempFile("oic_test", ".properties");
        propFile.deleteOnExit();
        FileUtil.writeBytes(propFile.getAbsolutePath(), "".getBytes("UTF-8"));
        systemProperties = new DynamicProperties(propFile);
        ComponentUtil.register(systemProperties, "systemProperties");
    }

    private final Object messagesLock = new Object();

    /**
     * Default constructor.
     */
    public ChatSession() {
        this.sessionId = UUID.randomUUID().toString();
        this.createdAt = LocalDateTime.now();
        this.lastAccessedAt = this.createdAt;
        this.messages = new CopyOnWriteArrayList<>();
    }

    /**
     * Creates a new chat session for the specified user.
     *

  public Collection<V> get(@ParametricNullness K key) {
    if (keyPredicate.apply(key)) {
      return unfiltered.get(key);
    } else if (unfiltered instanceof SetMultimap) {
      return new AddRejectingSet<>(key);
    } else {
      return new AddRejectingList<>(key);
    }
  }

  private static final class AddRejectingSet<K extends @Nullable Object, V extends @Nullable Object>
      extends ForwardingSet<V> {

  public Collection<V> get(@ParametricNullness K key) {
    if (keyPredicate.apply(key)) {
      return unfiltered.get(key);
    } else if (unfiltered instanceof SetMultimap) {
      return new AddRejectingSet<>(key);
    } else {
      return new AddRejectingList<>(key);
    }
  }

  private static final class AddRejectingSet<K extends @Nullable Object, V extends @Nullable Object>
      extends ForwardingSet<V> {