MockHttpServletResponse response = new MockHttpServletResponse();
ByteArrayOutputStream baos = new ByteArrayOutputStream();
response.setOutputStream(baos);
IDPLoginServlet login = new IDPLoginServlet();
login.init(servletConfig);
String samlAuth = DocumentUtil.getDocumentAsString(saml2Request.convert(art));
String samlMessage = Base64.encodeBytes(samlAuth.getBytes());
session.setAttribute("SAMLRequest", samlMessage);
login.testPost(request, response);
IDPServlet idp = new IDPServlet();
// No signing outgoing messages
servletConfig.addInitParameter(GeneralConstants.SIGN_OUTGOING_MESSAGES, "false");