按最新版的pytest测试框架。

如果只是单一的mark，不要加任何引号。

如果是要作and ,not之类的先把，一定要是双引号！

这个要记清楚，好像和以前版本的书上介绍的不一样，切记！

import pytestimport tasks@pytest.mark.smokedef test_list_raises():    with pytest.raises(TypeError):        tasks.list_tasks(owner=123)               @pytest.mark.get@pytest.mark.smokedef test_get_raises():    with pytest.raises(TypeError):        tasks.get(task_id='123')                def test_add_raises():    with pytest.raises(TypeError):        tasks.add(task="not a task object")def test_start_db_raises():    with pytest.raises(ValueError) as excinfo:        tasks.start_tasks_db('some/great/path', 'mysql')        exception_msg = excinfo.value.args[0]        assert exception_msg == "db_type must be a 'tiny' or 'mongo'"