autouse=True,可以使作用域内的测试方法都运行该fixture,而无需手动添加fixture的方法名或者使用pytest.mark.usefixtures。《pytest测试实战》中有个很好的例子:
#test_autouse.py import pytest import time #在每个session结束的时候打印时间 @pytest.fixture(scope="session", autouse=True) def footer_session_scope(): yield now = time.time() print("--") print(f"finished: {time.strftime('%d %b %X', time.localtime(now))}") print("----------------------------------") #在每个function结束的时候打印测试时间 @pytest.fixture(autouse=True) def footer_function_scope(): start = time.time() yield stop = time.time() delta = stop - start print(" test duration:{:0.3} seconds".format(delta)) #{:0.3}或者{:.3}表示截取小数点后三位 def test_1(): time.sleep(1) def test_2(): time.sleep(1.23) #运行结果 ============================= test session starts ============================= platform win32 -- Python 3.7.3, pytest-5.1.2, py-1.8.0, pluggy-0.12.0 -- D:programPython37python.exe cachedir: .pytest_cache metadata: {'Python': '3.7.3', 'Platform': 'Windows-7-6.1.7601-SP1', 'Packages': {'pytest': '5.1.2', 'py': '1.8.0', 'pluggy': '0.12.0'}, 'Plugins': {'html': '2.1.1', 'metadata': '1.8.0', 'rerunfailures': '9.0'}, 'JAVA_HOME': 'D:\program\Java\jdk1.8.0_171'} rootdir: E:virtual_workshoppytest-demo est_demo5 plugins: html-2.1.1, metadata-1.8.0, rerunfailures-9.0 collecting ... collected 2 items test_autouse.py::test_1 PASSED [ 50%] test duration:1.01 seconds test_autouse.py::test_2 PASSED [100%] test duration:1.23 seconds -- finished: 18 Apr 14:00:13 ---------------------------------- ============================== 2 passed in 2.27s ==============================