ActivityOperation doLogin = assertHasActivityOperation(loginSession, "do login");
StartNode start = assertHasStartNode(doLogin);
FinishNode finish = assertHasFinishNode(doLogin);
CancelNode cancel = assertHasCancelNode(doLogin);
SplitNode split = assertHasSplitNode(doLogin);
JoinNode join = assertHasJoinNode(doLogin);
// there should be a decision node from 'empty?'
DecisionNode decision = assertHasDecisionNode(doLogin, "true?");
assertHasExecutionEdge(doLogin, start, split);