if (nodes.getLength() > 1)
relayState = ((Element) nodes.item(1)).getAttributeNode("VALUE").getValue();
byte[] samlIDPResponse = PostBindingUtil.base64Decode(idpResponse);
SAML2Response saml2Response = new SAML2Response();
ResponseType rt = saml2Response.getResponseType(new ByteArrayInputStream(samlIDPResponse));
assertEquals("Match Identity URL:", this.identity, rt.getIssuer().getValue());
}