MockActionResponse actionResponse = new MockActionResponse();
portlet.processAction(actionRequest, actionResponse);
assertEquals("value", actionResponse.getRenderParameter("test"));
MockRenderRequest request = new MockRenderRequest(PortletMode.EDIT);
request.addParameter("param1", "value1");
request.addParameter("param2", "2");
MockRenderResponse response = new MockRenderResponse();
portlet.render(request, response);
assertEquals("test-value1-2", response.getContentAsString());