Merging in main #7725

	name: ARMI unit tests

	permissions:
	contents: read

	on:
	push:
	paths-ignore:
	- 'doc/**'
	pull_request:
	paths-ignore:
	- 'doc/**'

	concurrency:
	group: ${{ github.workflow }}-${{ github.ref }}
	cancel-in-progress: true

	jobs:
	build:

	runs-on: ubuntu-24.04
	strategy:
	matrix:
	python: [3.9, '3.10', '3.11', '3.12', '3.13']

	steps:
	- uses: actions/checkout@v4
	- name: Setup Python
	uses: actions/setup-python@v5
	with:
	python-version: ${{ matrix.python }}
	allow-prereleases: true
	- name: Update package index
	run: sudo apt-get update
	- name: Install mpi libs
	run: sudo apt-get -y install libopenmpi-dev
	- name: Run Tests
	run: \|
	pip install -e .[memprof,mpi,test]
	pytest -n 4 armi
	mpiexec -n 2 --use-hwthread-cpus pytest armi/tests/test_mpiFeatures.py
	mpiexec -n 2 --use-hwthread-cpus pytest armi/tests/test_mpiParameters.py
	mpiexec -n 2 --use-hwthread-cpus pytest armi/utils/tests/test_directoryChangersMpi.py

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