code: public void testQueryByInvalidVersion(){
    ProcessDefinitionQuery query=repositoryService.createProcessDefinitionQuery().processDefinitionVersion(3);
    verifyQueryResults(query,0);
    try {
      repositoryService.createProcessDefinitionQuery().processDefinitionVersion(-1).list();
      fail();
    }
   catch (  ActivitiIllegalArgumentException e) {
    }
    try {
      repositoryService.createProcessDefinitionQuery().processDefinitionVersion(null).list();
      fail();
    }
   catch (  ActivitiIllegalArgumentException e) {
    }
  }
  