Metadata-Version: 2.1
Name: pytest-mpiexec
Version: 0.0.1a1
Summary: pytest plugin for running individual tests with mpiexec
Project-URL: Documentation, https://github.com/minrk/pytest-mpiexec#readme
Project-URL: Issues, https://github.com/minrk/pytest-mpiexec/issues
Project-URL: Source, https://github.com/minrk/pytest-mpiexec
Author-email: Min RK <benjaminrk@gmail.com>
License: MIT License
        
        Copyright (c) 2023 Min RK
        
        Permission is hereby granted, free of charge, to any person obtaining a copy
        of this software and associated documentation files (the "Software"), to deal
        in the Software without restriction, including without limitation the rights
        to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
        copies of the Software, and to permit persons to whom the Software is
        furnished to do so, subject to the following conditions:
        
        The above copyright notice and this permission notice shall be included in all
        copies or substantial portions of the Software.
        
        THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
        IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
        FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
        AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
        LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
        OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
        SOFTWARE.
License-File: LICENSE
Keywords: mpi,pytest
Classifier: Development Status :: 3 - Alpha
Classifier: Framework :: Pytest
Classifier: Operating System :: OS Independent
Classifier: Programming Language :: Python :: 3
Requires-Python: >=3.7
Requires-Dist: mpi4py
Requires-Dist: pytest
Requires-Dist: pytest-reportlog
Description-Content-Type: text/markdown

# pytest-mpixec

pytest plugin for running individual tests with mpiexec

A test marked with `mark.mpiexec` will be run in a separate instance with mpiexec,
instead of in the current process.

The subprocess test will be run with pytest,
so fixtures and everything should still work!

The number of processes can be parametrized if you parametrize an argument called `mpiexec_n`.

## Try it out

```
pip install pytest-mpiexec
```

And write tests that use mpiexec:

```python
from mpi4py import MPI

@pytest.mark.mpiexec(n=2)
def test_my_mpi_code(fixtures):

@pytest.mark.mpiexec
@pytest.mark.parametrize("mpiexec_n", [1, 2, 3])
def test_my_mpi_code(mpiexec_n):
    assert MPI.COMM_WORLD.size == mpiexec_n

```

## Caveats

If you use module or session-scoped fixtures, another instance will be running,
so these can't conflict with other pytest runs (e.g. conflicting on ports, files, etc.)

## Prior art

- pytest-mpi (helpers for tests run inside mpi - compatible with this package!)
- pytest-easyMPI (similar goal to this one, but takes a different approach)
