assertEquals(0, processInstances.size());
//重置查询
processInstanceQuery = runtimeService.createProcessInstanceQuery();
//查询流程定义名称等于“TaskServiceTest”的流程实例
processInstances = processInstanceQuery.processDefinitionName("TaskServiceTest").endTimeBefore(begin).list();
assertEquals(1, processInstances.size());
//重置查询
processInstanceQuery = runtimeService.createProcessInstanceQuery();