assertNotNull(actionClass);
        assertEquals(RootAction.class, actionClass);
        assertEquals("org.codelibs.fess.app.web.RootAction", actionClass.getName());
    }

    public void test_fillInStackTrace() {
        // Test fillInStackTrace returns null for performance optimization
        UserRoleLoginException exception = new UserRoleLoginException(RootAction.class);
        Throwable result = exception.fillInStackTrace();

        UnsupportedSearchException exception = new UnsupportedSearchException(message);

        assertEquals(exception.getMessage(), exception.getLocalizedMessage());
    }

    public void test_fillInStackTrace() {
        // Test fillInStackTrace method
        UnsupportedSearchException exception = new UnsupportedSearchException("Stack trace test");

                foundTestMethod = true;
                break;
            }
        }
        assertTrue(foundTestMethod);
    }

    public void test_fillInStackTrace() {
        // Test that fillInStackTrace works properly
        JobNotFoundException exception = new JobNotFoundException("Fill stack trace test");

        Throwable filled = exception.fillInStackTrace();

        String localizedMessage = exception.getLocalizedMessage();

        assertNull(localizedMessage);
    }

    public void test_fillInStackTrace() {
        // Test fillInStackTrace method
        DictionaryExpiredException exception = new DictionaryExpiredException();
        Throwable result = exception.fillInStackTrace();

        assertNotNull(result);

        assertNotNull(toString);
        assertTrue(toString.contains("DataStoreException"));
        assertTrue(toString.contains(message));
    }

    public void test_fillInStackTrace() {
        // Test fillInStackTrace method
        DataStoreException exception = new DataStoreException("Stack trace test");
        Throwable filled = exception.fillInStackTrace();

        // Test that multiple calls return the same message
        assertEquals(retrievedMessage, exception.getMessage());
        assertEquals(retrievedMessage, exception.getMessage());
    }

    public void test_fillInStackTrace() {
        // Test fillInStackTrace method
        ResultOffsetExceededException exception = new ResultOffsetExceededException("Stack trace test");