pytest-assume not found by mypy

[trym-b]

It seems that pytest is missing type hint support for the plugin pytest-assume, which makes mypy fail to find the function pytest.assume, even though the plugin has been installed. I was told that this issue should likely be fixed in this repo, and not by adding a type hints to typeshed (see the original issue I created over at mypy: python/mypy#9326).

Here is a reproducer, run on ubuntu-20.04:

mkdir temp_dir
python -m venv temp_dir/virtual-env || exit $?
source temp_dir/virtual-env/bin/activate || exit $?
python -m pip install pytest pytest-assume mypy || exit $?

# Find ubuntu version
if [ -f /etc/lsb-release ]; then
    source /etc/lsb-release || exit $?
else
    echo "Error: /etc/lsb-release was not found."
    exit 1
fi

UBUNTU_VERSION="$DISTRIB_RELEASE"
echo "Running ubuntu-version: $UBUNTU_VERSION"
echo

echo "import pytest
def test_dummy() -> None:
    pytest.assume(1 != 2)
    pytest.assume(3 == 3)" >> "temp_dir/test_dummy_file.py" || exit $?

echo "Pytest version:"
pytest --version || exit $?
echo

echo "Mypy version:"
mypy --version || exit $?
echo

echo "Running pip list"
pip list || exit $?
echo

echo "Running pytest:"
pytest "temp_dir/test_dummy_file.py" || exit $?
echo

echo "Running mypy:"
mypy "temp_dir/test_dummy_file.py" || exit $?
echo

Which gives me this output when run:

Collecting pytest
  Using cached pytest-6.0.1-py3-none-any.whl (270 kB)
Collecting pytest-assume
  Using cached pytest_assume-2.3.2-py3-none-any.whl (5.6 kB)
Collecting mypy
  Using cached mypy-0.782-cp38-cp38-manylinux1_x86_64.whl (21.7 MB)
Collecting py>=1.8.2
  Using cached py-1.9.0-py2.py3-none-any.whl (99 kB)
Collecting packaging
  Using cached packaging-20.4-py2.py3-none-any.whl (37 kB)
Collecting attrs>=17.4.0
  Using cached attrs-19.3.0-py2.py3-none-any.whl (39 kB)
Collecting toml
  Using cached toml-0.10.1-py2.py3-none-any.whl (19 kB)
Collecting iniconfig
  Using cached iniconfig-1.0.1-py3-none-any.whl (4.2 kB)
Collecting pluggy<1.0,>=0.12
  Using cached pluggy-0.13.1-py2.py3-none-any.whl (18 kB)
Collecting more-itertools>=4.0.0
  Using cached more_itertools-8.4.0-py3-none-any.whl (43 kB)
Collecting mypy-extensions<0.5.0,>=0.4.3
  Using cached mypy_extensions-0.4.3-py2.py3-none-any.whl (4.5 kB)
Collecting typing-extensions>=3.7.4
  Using cached typing_extensions-3.7.4.2-py3-none-any.whl (22 kB)
Collecting typed-ast<1.5.0,>=1.4.0
  Using cached typed_ast-1.4.1-cp38-cp38-manylinux1_x86_64.whl (768 kB)
Collecting six
  Using cached six-1.15.0-py2.py3-none-any.whl (10 kB)
Collecting pyparsing>=2.0.2
  Using cached pyparsing-2.4.7-py2.py3-none-any.whl (67 kB)
Installing collected packages: py, six, pyparsing, packaging, attrs, toml, iniconfig, pluggy, more-itertools, pytest, pytest-assume, mypy-extensions, typing-extensions, typed-ast, mypy
Successfully installed attrs-19.3.0 iniconfig-1.0.1 more-itertools-8.4.0 mypy-0.782 mypy-extensions-0.4.3 packaging-20.4 pluggy-0.13.1 py-1.9.0 pyparsing-2.4.7 pytest-6.0.1 pytest-assume-2.3.2 six-1.15.0 toml-0.10.1 typed-ast-1.4.1 typing-extensions-3.7.4.2
Running ubuntu-version: 20.04

Pytest version:
pytest 6.0.1

Mypy version:
mypy 0.782

Running pip list
Package           Version
----------------- -------
attrs             19.3.0 
iniconfig         1.0.1  
more-itertools    8.4.0  
mypy              0.782  
mypy-extensions   0.4.3  
packaging         20.4   
pip               20.0.2 
pkg-resources     0.0.0  
pluggy            0.13.1 
py                1.9.0  
pyparsing         2.4.7  
pytest            6.0.1  
pytest-assume     2.3.2  
setuptools        44.0.0 
six               1.15.0 
toml              0.10.1 
typed-ast         1.4.1  
typing-extensions 3.7.4.2

Running pytest:
=================================================== test session starts ====================================================
platform linux -- Python 3.8.2, pytest-6.0.1, py-1.9.0, pluggy-0.13.1
rootdir: /home/trym/test/pytest-assume
plugins: assume-2.3.2
collected 1 item                                                                                                           

temp_dir/test_dummy_file.py .                                                                                        [100%]

==================================================== 1 passed in 0.02s =====================================================

Running mypy:
temp_dir/test_dummy_file.py:3: error: Module has no attribute "assume"
temp_dir/test_dummy_file.py:4: error: Module has no attribute "assume"
Found 2 errors in 1 file (checked 1 source file)

[RonnyPfannschmidt]

Pytest-assume has been superseded by pytest-check @okken has archived assume a while back

Pytest-check does not monkeypatch the pytest namespace

[trym-b]

Thanks for the feedback, will stop using pytest-assume. Did not know of pytest-check