Use mpiexec only for parallel execution #98

	# This workflow is used to run the unittest of pyiron

	name: Unittest Lower Bound

	on:
	push:
	branches: [ main ]
	pull_request:
	branches: [ main ]

	jobs:
	build:

	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v2
	- uses: conda-incubator/setup-miniconda@v2.2.0
	with:
	python-version: '3.9'
	mamba-version: "*"
	channels: conda-forge
	miniforge-variant: Mambaforge
	channel-priority: strict
	auto-update-conda: true
	environment-file: .ci_support/environment-old.yml
	- name: Test
	shell: bash -l {0}
	timeout-minutes: 5
	run: \|
	pip install versioneer[toml]==0.29
	pip install . --no-deps --no-build-isolation
	cd tests
	python -m unittest discover .
	env:
	OMPI_MCA_plm: 'isolated'
	OMPI_MCA_rmaps_base_oversubscribe: 'yes'
	OMPI_MCA_btl_vader_single_copy_mechanism: 'none'

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