jspItems.add(new Pair<>(":" + p.getFirst(), "/" + p.getSecond()));
        }
        for (String key : ComponentUtil.getVirtualHostHelper().getVirtualHostPaths()) {
            if (StringUtil.isBlank(key)) {
                key = "/";
            }
            for (final Pair<String, String> p : systemHelper.getDesignJspFileNames()) {

        // Register VirtualHostHelper in ComponentUtil
        VirtualHostHelper virtualHostHelper = new VirtualHostHelper() {
            @Override
            public String[] getVirtualHostPaths() {
                return paths;
            }
        };
        ComponentUtil.register(virtualHostHelper, "virtualHostHelper");

        // Also set up FessConfig if needed

                        new Tuple3<>("Custom-Header", "custom.value", "site3") };
            }
        });

        String[] paths = virtualHostHelper.getVirtualHostPaths();
        assertNotNull(paths);
        assertEquals(3, paths.length);
        assertEquals("/site1", paths[0]);
        assertEquals("/site2", paths[1]);
        assertEquals("/site3", paths[2]);
    }

     * @return A list of paths to the refreshed files.
     */
    public List<Path> refreshDesignJspFiles() {
        final List<Path> fileList = new ArrayList<>();
        stream(ComponentUtil.getVirtualHostHelper().getVirtualHostPaths())
                .of(stream -> stream.filter(s -> s != null && !"/".equals(s)).forEach(key -> {
                    designJspFileNameMap.entrySet().stream().forEach(e -> {