List taskInstanceList = persistenceService.findTaskInstancesForProcessInstance(currentProcessInstance.getId(), "Goods_Deliver_Process.PaymentActivity");
assertNotNull(taskInstanceList);
assertEquals(1, taskInstanceList.size());
assertEquals(new Integer(ITaskInstance.RUNNING), ((ITaskInstance) taskInstanceList.get(0)).getState());
List workItemList = persistenceService.findTodoWorkItems(CurrentUserAssignmentHandlerMock.ACTOR_ID, "Goods_Deliver_Process", "Goods_Deliver_Process.PaymentActivity.Payment_Task");
assertNotNull(workItemList);
assertEquals(1, workItemList.size());
assertEquals(new Integer(ITaskInstance.RUNNING), ((IWorkItem) workItemList.get(0)).getState());
paymentWorkItemId = ((IWorkItem) workItemList.get(0)).getId();