Page page = webClient.getPage(uri);
assertTrue(page.getWebResponse().getStatusCode() == HttpServletResponse.SC_OK);
ImageInfo info = new ImageInfo();
info.setInput(page.getWebResponse().getContentAsStream());
//image recognizable?
assertTrue(info.check());
assertEquals(ImageInfo.FORMAT_GIF, info.getFormat());
ui.setLineType(SeparatorRendererBase.LINE_TYPE_SOLID);
renderView();
resource = builder.getResource("org.richfaces.renderkit.html.images.SimpleSeparatorImage");