def create_user_realm_stub(self, protocol, accountType, mexUrl, wstrustUrl, err=None):
userRealm = UserRealm(cp['callContext'], '', '')
def side_effect(callback):
callback(err)
userRealm.discover = mock.MagicMock(side_effect=side_effect)
userRealm._federationProtocol = protocol
userRealm._accountType = accountType
userRealm._federationMetadataUrl = mexUrl
userRealm._federationActiveAuthUrl = wstrustUrl
return userRealm
