Python pytest中的测试用例执行顺序
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Test case execution order in pytest
提问by Kocka
I am using pytest. I have two files in a directory. In one of the files there is a long running test case that generates some output. In the other file there is a test case that reads that output. How can I ensure the proper execution order of the two test cases? Is there any alternative other than puting the test cases in the same file in the proper order?
我正在使用 pytest。我在一个目录中有两个文件。在其中一个文件中，有一个长时间运行的测试用例会生成一些输出。在另一个文件中有一个读取该输出的测试用例。如何确保两个测试用例的正确执行顺序？除了以正确的顺序将测试用例放在同一个文件中之外，还有其他选择吗？
采纳答案by Frank T
In general you can configure the behavior of basically any part of pytest using its well-specified hooks.
通常，您可以使用其明确指定的 hooks配置 pytest 基本上任何部分的行为。
In your case, you want the "pytest_collection_modifyitems" hook, which lets you re-order collected tests in place.
在您的情况下，您需要“pytest_collection_modifyitems”挂钩，它可以让您重新排序收集的测试到位。
That said, it does seem like ordering your tests should be easier -- this is Python after all! So I wrote a plugin for ordering tests: "pytest-ordering". Check out the docsor install it from pypi. Right now I recommend using @pytest.mark.first and @pytest.mark.second, or one of the @pytest.mark.order# markers, but I have some ideas about more useful APIs. Suggestions welcome :)
也就是说，订购测试似乎应该更容易——毕竟这是 Python！所以我写了一个用于排序测试的插件："pytest-ordering"。查看文档或从pypi安装它。现在我建议使用@pytest.mark.first 和@pytest.mark.second，或@pytest.mark.order# 标记之一，但我对更有用的API 有一些想法。欢迎提出建议:)
回答by asterio gonzalez
Maybe you can consider using dependencypytest plugin, where you can set the test dependencies easily:
也许你可以考虑使用dependencypytest plugin，你可以在其中轻松设置测试依赖项：
@pytest.mark.dependency()
def test_long():
pass
@pytest.mark.dependency(depends=['test_long'])
def test_short():
pass
This way test_shortwill only execute if test_longis success and force the execution sequenceas well.
这种方式test_short只会在test_long成功时执行并强制执行顺序。
回答by funky-future
There's also a plugin pytest-orderingthat seems to meet your requirements.
还有一个插件pytest-ordering似乎可以满足您的要求。
回答by Ali Zwd
Try this:
尝试这个：
@pytest.fixture(xxx)
def test_A():
pass
yield
pass
@pytest.mark.usefixtures('test_A')
def test_B():
pass
回答by zhihao he
main.py:
主要.py：
import functools
import pytest
from demo import test_foo,test_hi
def check_depends(depends):
try:
for dep in depends:
dep()
except Exception as e:
return dep
else:
return True
def pytest_depend(depends):
def pytest_depend_decorator(func):
stat = check_depends(depends)
if stat is True:
return func
else:
return pytest.mark.skip(True, reason="%s[skip] --> %s[Failed]" % (func.__name__, stat.__name__))(func)
return pytest_depend_decorator
@pytest_depend([test_foo,test_hi])
def test_bar():
pass
@pytest_depend([test_foo,test_hi])
def test_bar2():
pass
demo.py:
演示.py：
def test_hi():
pass
def test_foo():
assert False
platform linux -- Python 3.5.2, pytest-3.8.2, py-1.6.0, pluggy-0.7.1 -- /usr/bin/python3
linux平台——Python 3.5.2、pytest-3.8.2、py-1.6.0、pluggy-0.7.1——/usr/bin/python3
pytest -vrsx ./plugin.py
pytest -vrsx ./plugin.py
回答by Amol Kumar
Make Sure you have installed pytest-ordering package. To confirm go to Pycharm settings>>Project Interpreter >> and look for pytest-ordering : If it is not available install it. Pycharm settings>>Project Interpreter >> Click on + button and search pytest-ordering install it. Voila!! It will definitely work.
确保你已经安装了 pytest-ordering 包。要确认转到 Pycharm 设置>>项目解释器 >> 并查找 pytest-ordering ：如果不可用，请安装它。Pycharm设置>>项目解释器>>点击+按钮并搜索pytest-ordering安装它。瞧！！它肯定会起作用。
回答by Ravichandran K
Make use of the '--randomly-dont-reorganize'option or '-p no:randomly'available in pytest-randomlyplugin, this will just run your test in the same order as you mentioned in your module.
使用pytest-randomly插件中可用的“--randomly-dont-reorganize”选项或“-p no:randomly”，这将按照您在模块中提到的相同顺序运行您的测试。
Module:
模块：
import pytest
def test_three():
assert True
def test_four():
assert True
def test_two():
assert True
def test_one():
assert True
Execution:
执行：
(tmp.w95BqE188N) rkalaiselvan@dev-rkalaiselvan:~/$ py.test --randomly-dont-reorganize test_dumm.py
======================================================================== test session starts ========================================================================
platform linux2 -- Python 2.7.12, pytest-3.10.1, py-1.5.4, pluggy-0.7.1 -- /tmp/tmp.w95BqE188N/bin/python2
cachedir: .pytest_cache
Using --randomly-seed=1566829391
rootdir: /home/rkalaiselvan, inifile: pytest.ini
plugins: randomly-1.2.3, timeout-1.3.1, cov-2.6.0, mock-1.10.0, ordering-0.6
collected 4 items
test_dumm.py::test_three PASSED
test_dumm.py::test_four PASSED
test_dumm.py::test_two PASSED
test_dumm.py::test_one PASSED
(tmp.w95BqE188N) rkalaiselvan@dev-rkalaiselvan:~/$ py.test -p no:randomly test_dumm.py
======================================================================== test session starts ========================================================================
platform linux2 -- Python 2.7.12, pytest-3.10.1, py-1.5.4, pluggy-0.7.1 -- /tmp/tmp.w95BqE188N/bin/python2
cachedir: .pytest_cache
Using --randomly-seed=1566829391
rootdir: /home/rkalaiselvan, inifile: pytest.ini
plugins: randomly-1.2.3, timeout-1.3.1, cov-2.6.0, mock-1.10.0, ordering-0.6
collected 4 items
test_dumm.py::test_three PASSED
test_dumm.py::test_four PASSED
test_dumm.py::test_two PASSED
test_dumm.py::test_one PASSED
