Description
Describe the bug
Code coverage does not work when testing installed library.
To Reproduce
How can we reproduce the problem? Please be specific. Don't link to a failing CI job. Answer the questions below:
- What version of Python are you using? 3.10
- What version of coverage.py shows the problem? The output of
coverage debug sysis helpful. 7.5.1 - What versions of what packages do you have installed? The output of
pip freezeis helpful. - What code shows the problem? Give us a specific commit of a specific repo that we can check out. If you've already worked around the problem, please provide a commit before that fix.
- What commands should we run to reproduce the problem? Be specific. Include everything, even
git clone,pip install, and so on. Explain like we're five!
Folder architecture:
pytest.ini
production_code_folder
- pyproject.toml
- pxz_dataset
- sample.py
- __init__.py
test_code_folder
- test.py
pyproject.toml:
[build-system]
requires = ["setuptools"]
build-backend = "setuptools.build_meta"
[project]
name = "pxz_dataset"
version = "1.0.0"
__init__.py:
from .sample import big_run
sample.py:
import multiprocessing
def f(x):
return x*x
def big_run(n):
with multiprocessing.Pool(5) as p:
a = p.map(f, list(range(n)))
p.close()
p.join()
test.py:
from pxz_dataset import big_run
def test_main():
big_run(10)
pytest.ini
[pytest]
python_files = test*.py
required_plugins = pytest-cov pytest-xdist pytest-env
[coverage:run]
concurrency = multiprocessing
branch = true
parallel = true
sigterm = true
command line to run
cd path/to/production_code_folder
python -m build
pip install --find-links=dist/ pxz_dataset
cd ../test_code_folder
pytest . --cov=pxz_dataset --cov-branch --cov-report=term --cov-config=../pytest.ini
And this prints
---------- coverage: platform linux, python 3.10.6-final-0 -----------
Name Stmts Miss Branch BrPart Cover
------------------------------------------------------------------------------------------------------------------------
/mnt/data/global_envs/seb_py310/lib/python3.10/site-packages/pxz_dataset/__init__.py 1 0 0 0 100%
/mnt/data/global_envs/seb_py310/lib/python3.10/site-packages/pxz_dataset/sample.py 8 1 2 0 90%
------------------------------------------------------------------------------------------------------------------------
TOTAL 9 1 2 0 91%
Expected behavior
I should have 100% code coverage.
We can test this by doing the following
pip uninstall pxz_dataset
cp -r ../production_code_folder/pxz_dataset .
pytest . --cov=pxz_dataset --cov-branch --cov-report=term --cov-config=../pytest.ini
And this prints
---------- coverage: platform linux, python 3.10.6-final-0 -----------
Name Stmts Miss Branch BrPart Cover
-----------------------------------------------------------
pxz_dataset/__init__.py 1 0 0 0 100%
pxz_dataset/sample.py 8 0 2 0 100%
-----------------------------------------------------------
TOTAL 9 0 2 0 100%
Additional context
I tried simply copy pasting the folder anywhere else in the system and there is no problem.
I tried duplicating site-packages anywhere else in the system and putting the folder pxz_dataset in it and no problem
I tried creating a folder /mnt/data/global_envs/seb_py310/lib/python3.10/sites and putting pxz_dataset in it and also no problem.