TaskService taskService = activitiRule.getTaskService();
List<Task> list2 = taskService.createTaskQuery().processInstanceId(processInstance.getId()).list();
assertEquals(0, list2.size());*/
// reactive process instance
runtimeService.activateProcessInstanceById(processInstance.getId());
// verify active process instance
list = runtimeService.createProcessInstanceQuery().active().list();
assertEquals(1, list.size());