英文:
PyTest: "no tests ran" even though tests were clearly run
问题
我有以下的pytest配置文件：
[pytest]
filterwarnings =
ignore::DeprecationWarning
ignore::UserWarning
python_files =
test_file_1.py
test_file_2.py
log_cli = True
log_level = INFO
我在本地使用以下命令运行pytest：
python -m pytest path
并得到如下输出：
====================================================================================================== no tests ran in 24.77s =======================================================================================================
这个输出令我难以置信，因为之前，由于有日志记录，我在终端中会得到以下输出：
INFO root:test_file_1.py:40 torch.Size([100, 71])
我注意到，如果我在pytest.ini中删除filterwarnings，我会得到一个"警告汇总"的输出，而不是"没有运行测试"的输出。
这里到底发生了什么？为什么filterwarnings会导致"没有运行测试"的输出？
英文:
I have the following config file for pytest:
[pytest]
filterwarnings =
ignore::DeprecationWarning
ignore::UserWarning
python_files =
test_file_1.py
test_file_2.py
log_cli = True
log_level = INFO
I run pytest locally with the following command:
python -m pytest path
and get the output
====================================================================================================== no tests ran in 24.77s =======================================================================================================
which I cannot believe, since before, I get the following output in the terminal (because of the logging):
INFO root:test_file_1.py:40 torch.Size([100, 71])
I noticed that if I remove the filterwarnings in pytest.ini, I get a warnings summary, but not the output "no tests ran".
What exactly is happening here? Why does filterwarnings lead to the output "no tests ran"?
答案1
得分: 2
pytest 期望测试方法按照特定的方式命名。例如，def test_1():。
如果你只是将 Python 代码放入一个文件中，并使用 pytest 运行它：
import time
time.sleep(2)
你会看到：2.01 秒内没有运行任何测试。
但是，如果你的文件中有一个以 test_ 开头的方法，并使用 pytest 运行它：
import time
def test_1():
time.sleep(2)
你会看到：2.01 秒内运行了 1 个测试，全部通过。
因此，如果你希望你的测试被发现，就重要遵循 pytest 设定的命名约定。（有关发现规则的更多信息：https://docs.pytest.org/en/latest/example/pythoncollection.html）
请确保你的文件以 test_ 开头，并且你的方法以 test_ 开头，这样默认的 pytest 发现规则就能找到你的测试。
英文:
pytest expects test methods to be named a certain way. Eg def test_1():.
If you just throw python code into a file and run it with pytest:
import time
time.sleep(2)
You'll see: no tests ran in 2.01s.
But if you have a method that starts with test_ in your file and run it with pytest:
import time
def test_1():
time.sleep(2)
You'll see: 1 passed in 2.01s.
So it's important to follow the naming conventions set by pytest if you want your tests to be discovered. (More info on discovery rules: https://docs.pytest.org/en/latest/example/pythoncollection.html)
Have your files start with test_, and have your methods start with test_ so that the default pytest discovery rules find your tests.
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