def test05SamlAttributeQuery(self):
        if self.skipTests:
            return

        # Prepare a client query
        attributeQuery = AttributeQuery()
        attributeQuery.version = SAMLVersion(SAMLVersion.VERSION_20)
        attributeQuery.id = str(uuid4())
        attributeQuery.issueInstant = datetime.utcnow()

        attributeQuery.issuer = Issuer()
        attributeQuery.issuer.format = Issuer.X509_SUBJECT
        attributeQuery.issuer.value = '/O=ESG/OU=NCAR/CN=Gateway'

        attributeQuery.subject = Subject()
        attributeQuery.subject.nameID = NameID()
        attributeQuery.subject.nameID.format = ESGFSamlNamespaces.NAMEID_FORMAT
        attributeQuery.subject.nameID.value = TestUserDatabase.OPENID_URI

        emailAddressAttribute = Attribute()
        emailAddressAttribute.name = ESGFSamlNamespaces.EMAILADDRESS_ATTRNAME
        emailAddressAttribute.nameFormat = "InvalidFormat"
        emailAddressAttribute.friendlyName = "EmailAddress"

        attributeQuery.attributes.append(emailAddressAttribute)

        authzAttribute = Attribute()
        authzAttribute.name = TestUserDatabase.ATTRIBUTE_NAMES[0]
        authzAttribute.nameFormat = XSStringAttributeValue.DEFAULT_FORMAT
        authzAttribute.friendlyName = "authz"

        attributeQuery.attributes.append(authzAttribute)

        # Add the response - the interface will populate with an assertion as
        # appropriate
        samlResponse = Response()

        samlResponse.issueInstant = datetime.utcnow()
        samlResponse.id = str(uuid4())
        samlResponse.issuer = Issuer()

        # Initialise to success status but reset on error
        samlResponse.status = Status()
        samlResponse.status.statusCode = StatusCode()
        samlResponse.status.statusMessage = StatusMessage()
        samlResponse.status.statusCode.value = StatusCode.SUCCESS_URI

        # Nb. SAML 2.0 spec says issuer format must be omitted
        samlResponse.issuer.value = "CEDA"

        samlResponse.inResponseTo = attributeQuery.id

        # Set up the interface object

        # Define queries for SAML attribute names
        samlAttribute2SqlQuery = {
            ESGFSamlNamespaces.FIRSTNAME_ATTRNAME:
            self.__class__.SAML_FIRSTNAME_SQLQUERY,
            ESGFSamlNamespaces.LASTNAME_ATTRNAME:
            self.__class__.SAML_LASTNAME_SQLQUERY,
            ESGFSamlNamespaces.EMAILADDRESS_ATTRNAME:
            self.__class__.SAML_EMAILADDRESS_SQLQUERY,
            TestUserDatabase.ATTRIBUTE_NAMES[0]:
            self.__class__.SAML_ATTRIBUTES_SQLQUERY
        }

        attributeInterface = SQLAlchemyAttributeInterface(
            samlAttribute2SqlQuery=samlAttribute2SqlQuery)

        attributeInterface.connectionString = TestUserDatabase.DB_CONNECTION_STR

        attributeInterface.samlValidRequestorDNs = (
            '/O=STFC/OU=CEDA/CN=AuthorisationService',
            '/O=ESG/OU=NCAR/CN=Gateway')

        attributeInterface.setProperties(samlAssertionLifetime=28800.)

        attributeInterface.samlSubjectSqlQuery = (
            SQLAlchemyAttributeInterfaceTestCase.SAML_SUBJECT_SQLQUERY)

        # Make the query
        attributeInterface.getAttributes(attributeQuery, samlResponse)