// Test that DictionaryException is instance of FessSystemException
        DictionaryException exception = new DictionaryException("Test");

        assertTrue(exception instanceof org.codelibs.fess.exception.FessSystemException);
        assertTrue(exception instanceof RuntimeException);
        assertTrue(exception instanceof Exception);
        assertTrue(exception instanceof Throwable);
    }

        StorageException exception = new StorageException("Test");

        assertTrue(exception instanceof FessSystemException);
        assertTrue(exception instanceof RuntimeException);
        assertTrue(exception instanceof Exception);
        assertTrue(exception instanceof Throwable);
    }

    public void test_stackTraceWithCause() {
        // Test that stack trace is properly preserved with cause

      // Put types estimated to be the most frequent first.
      if (value instanceof CharSequence) {
        return ((CharSequence) value).length() == 0;
      } else if (value instanceof Collection) {
        return ((Collection<?>) value).isEmpty();
      } else if (value instanceof Map) {
        return ((Map<?, ?>) value).isEmpty();
      } else if (value instanceof java.util.Optional) {

     *
     * 1) An interface I extending Comparable<I> so that the created array is of
     * an interface type. 2) An instance of a class implementing that interface
     * so that we can pass non-null instances of the interface.
     *
     * (Currently it's safe to pass instances for which compareTo() always
     * returns 0, but if we had a SingletonImmutableSortedSet, this might no
     * longer be the case.)
     *

        // Verify inheritance hierarchy
        assertTrue(exception instanceof FessSystemException);
        assertTrue(exception instanceof RuntimeException);
        assertTrue(exception instanceof Exception);
        assertTrue(exception instanceof Throwable);
    }

    public void test_stackTracePresence() {
        // Setup

        if (o == null) {
            return null;
        } else if (o instanceof Byte) {
            return (Byte) o;
        } else if (o instanceof Number) {
            return ((Number) o).byteValue();
        } else if (o instanceof String) {
            return toByte((String) o);
        } else if (o instanceof java.util.Date) {
            if (pattern != null) {

   * called on the {@code TypeVariable} instance has the same name as one of the public methods of
   * {@link TypeVariableImpl}, the proxy calls the same method on its instance of {@code
   * TypeVariableImpl}. Otherwise it throws {@link UnsupportedOperationException}; this should only
   * apply to {@code getAnnotatedBounds()}. This does mean that users on Java who obtain an instance

        DataStoreException exception = new DataStoreException("Test");

        assertTrue(exception instanceof DataStoreException);
        assertTrue(exception instanceof FessSystemException);
        assertTrue(exception instanceof RuntimeException);
        assertTrue(exception instanceof Exception);
        assertTrue(exception instanceof Throwable);
    }

    public void test_throwAndCatch() {

    public void test_constructor() {
        assertNotNull("Constructor should create instance", target);
        assertTrue("Instance should be of correct type", target instanceof HotThreadMonitorTarget);
        assertTrue("Instance should be a MonitorTarget", target instanceof MonitorTarget);
        assertTrue("Instance should be a TimeoutTarget", target instanceof TimeoutTarget);
    }

    public void test_expired_method_exists() throws Exception {

        if (keyObj instanceof final UrlQueue<?> urlQueue) {
            return escapeValue(urlQueue.getUrl());
        }
        if (keyObj instanceof final StatsKeyObject statsKey) {
            return escapeValue(statsKey.getUrl());
        }
        if (keyObj instanceof final String key) {
            return escapeValue(key);
        }
        if (keyObj instanceof final Number key) {