@GwtCompatible
public final class HashMultiset<E extends @Nullable Object> extends AbstractMapBasedMultiset<E> {

  /** Creates a new, empty {@code HashMultiset} using the default initial capacity. */
  public static <E extends @Nullable Object> HashMultiset<E> create() {
    return new HashMultiset<>();
  }

  /**
   * Creates a new, empty {@code HashMultiset} with the specified expected number of distinct
   * elements.
   *

    void testConstructor() {
        // Test with normal path
        request = new Smb2CreateRequest(mockConfig, "test\\file.txt");
        assertNotNull(request);
        assertEquals("\\test\\file.txt", request.getPath());

        // Test with leading backslash
        request = new Smb2CreateRequest(mockConfig, "\\test\\file2.txt");
        assertEquals("\\test\\file2.txt", request.getPath());

        // Setup
        final String message = "Test SSO error message";
        final Exception cause = new RuntimeException("Test cause");
        final VaMessenger<FessMessages> messageCode = messages -> messages.addErrorsSsoLoginError(UserMessages.GLOBAL_PROPERTY_KEY);

        // Execute
        final SsoMessageException exception = new SsoMessageException(messageCode, message, cause);

        // Verify
        assertNotNull(exception);

            try {
                final Auth auth = new Auth(getSettings(), request, response);
                final AuthnRequestParams authnRequestParams = new AuthnRequestParams(false, false, true);
                final String loginUrl = auth.login(null, authnRequestParams, true);
                request.getSession().setAttribute(SAML_STATE, UuidUtil.create());

    private final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();

    private volatile boolean shutdown = false;

    /**
     * Create a new persistent handle manager
     * @param context the CIFS context
     */
    public PersistentHandleManager(CIFSContext context) {
        this.context = context;
        this.handles = new ConcurrentHashMap<>();
        this.guidToHandle = new ConcurrentHashMap<>();

    @BeforeEach
    public void setUp() {
        testGuid = new HandleGuid();
        testFileId = new byte[16];
        for (int i = 0; i < 16; i++) {
            testFileId[i] = (byte) (i + 1);
        }
        testLeaseKey = new Smb2LeaseKey();
    }

    @Test
    public void testHandleInfoCreation() {

                    Arrays.spliterator(new String[] {"a", "b", "c", "d", "e"}),
                    0,
                    Ascii::toUpperCase))
        .expect("A", "B", "C", "D", "E");
  }

  public void testFlatMap() {
    SpliteratorTester.of(
            () ->
                CollectSpliterators.flatMap(
                    Arrays.spliterator(new String[] {"abc", "", "de", "f", "g", ""}),

        new TreeBasedTable<>(
            requireNonNull(table.rowKeySet().comparator()), table.columnComparator());
    result.putAll(table);
    return result;
  }

  TreeBasedTable(Comparator<? super R> rowComparator, Comparator<? super C> columnComparator) {
    super(new TreeMap<R, Map<C, V>>(rowComparator), new Factory<C, V>(columnComparator));

        TestAuthenticationChain chain = new TestAuthenticationChain();
        chain.updateThrowsException = false;

        chain.update(null);

        assertEquals(1, chain.updateCalls.size());
        assertNull(chain.updateCalls.get(0));
    }

    // Test update with multiple calls
    @Test
    public void test_update_multipleCalls() {
        TestAuthenticationChain chain = new TestAuthenticationChain();

        super.setUp(testInfo);
        stemmerOverrideFile = new StemmerOverrideFile("1", "dummy", new Date());
        List<StemmerOverrideItem> itemList = new ArrayList<>();
        itemList.add(new StemmerOverrideItem(1, "aaa", "a"));
        itemList.add(new StemmerOverrideItem(2, "bbb", "b"));
        itemList.add(new StemmerOverrideItem(3, "ccc", "c"));
        stemmerOverrideFile.stemmerOverrideItemList = itemList;