import pytest
def test_demo():
import warnings
warnings.warn('test warn',DeprecationWarning)
assert True
if __name__ == '__main__':
pytest.main(['-sv',__file__])
============================= test session starts =============================
platform win32 -- Python 3.9.6, pytest-7.1.2, pluggy-1.0.0 -- D:\Python39\python.exe
cachedir: .pytest_cache
metadata: ...
rootdir: D:\pythonProject\AutoTest\PytestTemp, configfile: pytest.ini
plugins: ...
collecting ... collected 1 item
test_demo.py::test_demo PASSED
============================== warnings summary ===============================
testCases/test_demo.py::test_demo
test_demo.py:5: DeprecationWarning: test warn
warnings.warn('test warn',DeprecationWarning)
-- Docs: https://docs.pytest.org/en/stable/how-to/capture-warnings.html
======================== 1 passed, 1 warning in 0.05s =========================
进程已结束，退出代码为 0
pytest提供了一个命令行参数-W
-W PYTHONWARNINGS, --pythonwarnings=PYTHONWARNINGS
含义: set which warnings to report, see -W option of python itself.
python的-W
-W arg : warning control; arg is action:message:category:module:lineno also PYTHONWARNINGS=arg
https://docs.python.org/3/library/warnings.html#warning-filter
关于格式说明
action is one of the following strings:
| Value | Disposition |
|---|---|
"default" |
print the first occurrence of matching warnings for each location (module + line number) where the warning is issued |
"error" |
turn matching warnings into exceptions |
"ignore" |
never print matching warnings |
"always" |
always print matching warnings |
"module" |
print the first occurrence of matching warnings for each module where the warning is issued (regardless of line number) |
"once" |
print only the first occurrence of matching warnings, regardless of location |
message is a string containing a regular expression that the start of the warning message must match, case-insensitively. In -W and PYTHONWARNINGS, message is a literal string that the start of the warning message must contain (case-insensitively), ignoring any whitespace at the start or end of message.
category is a class (a subclass of Warning) of which the warning category must be a subclass in order to match.
module is a string containing a regular expression that the start of the fully qualified module name must match, case-sensitively. In -W and PYTHONWARNINGS, module is a literal string that the fully qualified module name must be equal to (case-sensitively), ignoring any whitespace at the start or end of module.
lineno is an integer that the line number where the warning occurred must match, or 0 to match all line numbers.
增加命令行处理
# action:message:category:module:lineno # 注意格式
-W error::DeprecationWarning # 意思是看到DeprecationWarning就把它当做是一个error
================================== FAILURES ===================================
__________________________________ test_demo __________________________________
def test_demo():
import warnings
> warnings.warn('test warn',DeprecationWarning)
E DeprecationWarning: test warn
test_demo.py:5: DeprecationWarning
=========================== short test summary info ===========================
FAILED test_demo.py::test_demo - DeprecationWarning: test warn
============================== 1 failed in 0.09s ==============================
可以看到case变成了failed
换一下，改为ignore，case就PASSED了
pytest.main(['-sv','-W ignore::DeprecationWarning',__file__])
============================== 1 passed in 0.07s ==============================
命令行的做法也可以等价到装饰器的写法，跟大多数的插件类似，命令行是针对所有的，装饰器是针对某个case的
@pytest.mark.filterwarnings('ignore::DeprecationWarning') # 装饰在被测函数上即可
@pytest.mark.filterwarnings('error::DeprecationWarning')
你也可以这样写一个pytest.ini
[pytest]
filterwarnings:
ignore::DeprecationWarning
或者这样
[pytest]
filterwarnings:
error::DeprecationWarning
还可以这样
[pytest]
filterwarnings:
error
ignore::DeprecationWarning
这个意思是，所有的warning都被处理成error，但忽略DeprecationWarning。
注意：当警告与列表中的多个选项匹配时,将执行最后一个匹配选项的操作。
--disable-warnings命令行选项可以禁用warning summary
============================== warnings summary ===============================
testCases/test_demo.py::test_demo
test_demo.py:5: DeprecationWarning: test warn
warnings.warn('test warn',DeprecationWarning)
-- Docs: https://docs.pytest.org/en/stable/how-to/capture-warnings.html
上面的warning加了命令行之后就没了
命令行的解释
--disable-warnings, --disable-pytest-warnings ： disable warnings summary
还有一个命令行-pno:warnings，完全禁用警告捕获
pytest.main(['-sv','-pno:warnings',__file__])
实测-pno:warnings的pno要挨在一起，这有点...
命令行的解释
-p name early-load given plugin module name or
entry point (multi-allowed).
To avoid loading of plugins, use the
`no:` prefix, e.g. `no:doctest`.
如果你放在pytest.ini中的pno就可分可合(离谱)
[pytest]
addopts = -p no:warnings # -pno:warnings
在性能测试过程中总会收到一些需求如：单接口每秒并发20，这种并发持续60秒，通过负载测试查看系统稳定性，今天就让我们来浅谈一下这种场景如何去实现性能测试~