((MockPortletPreferences) preferences).setValue("minrefresh", "900");
((MockPortletPreferences) preferences).setValue("disableescape", "true");
MockRenderRequest request = new MockRenderRequest(portletContext);
request.setPreferences(preferences);
request.addLocale(Locale.ENGLISH);
MockRenderResponse response = new MockRenderResponse();
rssPortlet.render(request, response);
rssPortlet.cache.clearCache();