要使用python内置的fixture，首先得明确fixture返回的数据类型
fixture参考官网 https://docs.pytest.org/en/7.0.x/reference/reference.html#tmpdir-factory
负责在运行前创建临时文件目录，并在测试结束后删除
如果测试代码要对文件进行读写操作，可以使用tmpdir或tmpdir_factory来创建目录
tmpdir的作用范围是函数级别，tmpdir_factory的作用范围是会话级别
查看官方文件，可以看到tmpdir返回的是一个py._path.local.LocalPath的对象
py._path.local.LocalPath的API文档 https://py.readthedocs.io/en/latest/path.html
使用dirname可以打印出tmpdir的路径
def test_tempdir(tmpdir): print("dirname:{}".format(tmpdir.dirname)) sub_dir=tmpdir.mkdir("test01") print("sub dirname:{}".format(sub_dir)) another_file=sub_dir.join("somethng.txt") another_file.write("use tmpdir") read_txt=another_file.read() assert read_txt=="use tmpdir"
运行结果：
rootdir: E:JenkinsLearnMy-pytesttest, configfile: pytest.iniplugins: cov-3.0.0collecting ..、collected 1 itemtest_my_add.py::test_tempdir nodeid:api case/test_my_add.py::test_tempdirdirname:C:UsersAdministratorAppDataLocalTemppytest-of-xxxxpytest-4sub dirname:C:UsersAdministratorAppDataLocalTemppytest-of-xxxxpytest-4test_tempdir0test01PASSED
tmpdir_factory则是一个TempdirFactory对象
def test_tmpdir_factory(tmpdir_factory): base_tmp=tmpdir_factory.getbasetemp() print("base_tmp:{}".format(base_tmp))
运行结果：
plugins: cov-3.0.0collecting ..、collected 1 itemtest_my_add.py::test_tmpdir_factory nodeid:api case/test_my_add.py::test_tmpdir_factorybase_tmp:C:UsersAdministratorAppDataLocalTemppytest-of-xxxpytest-5PASSED
pytestconfig pytestconfig可以通过命令行参数，选项，配置文件，插件，运行目录等方式控制pytest
它返回一个pytest.config.Config对象 Config的API：https://docs.pytest.org/en/latest/reference/reference.html#config
Config有一个方法getoption，可以获取命令行的参数的值
def test_pytestconfig(pytestconfig): verbose_value=pytestconfig.getoption("verbose") print("value:{}".format(verbose_value))
运行结果：
test_my_add.py::test_pytestconfig nodeid:api case/test_my_add.py::test_pytestconfigvalue:1PASSED
request request是个特殊的fixture，主要是提供测试方法正在使用的fixture的信息，比如fixture的名字，scope等
https://docs.pytest.org/en/7.0.x/reference/reference.html#request
param属性，request.param可以请求fixture的参数
@pytest.fixture()def my_fixture_two(my_fixture_three,request): print("fixture name:{}".format(request.fixturename)) return "a"def test_request(my_fixture_two): a=my_fixture_two
运行结果：
test_my_add.py::test_request nodeid:api case/test_my_add.py::test_requestfixture name:my_fixture_twoPASSED