}
        });

        List<Path> fileList = systemHelper.refreshDesignJspFiles();
        assertEquals(0, fileList.size());

        virtualHostList.add(new Tuple3<>("abc.example.com", "8080", "host1"));
        fileList = systemHelper.refreshDesignJspFiles();
        assertEquals(0, fileList.size());

        systemHelper.addDesignJspFileName("xxx", "yyy.jsp");