Fix crash when unbuffer cannot be installed #240

	name: Python application

	on:
	push:
	branches:
	- '*'
	pull_request:
	branches: [ master ]

	jobs:
	docker:
	runs-on: ubuntu-latest
	steps:
	- name: Set up Docker Buildx
	uses: docker/setup-buildx-action@v2
	-
	name: Build and push
	uses: docker/build-push-action@v5
	with:
	push: false
	tags: tbarbette/npf:latest

	build:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v2
	- name: Set up Python 3.9
	uses: actions/setup-python@v2
	with:
	python-version: 3.9
	- uses: actions/cache@v2
	with:
	path: ~/.cache/pip
	key: ${{ hashFiles('setup.py') }}
	- name: Install dependencies
	run: \|
	python -m pip install --upgrade pip
	if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
	pip install -e .
	pip install pytest
	- name: Version
	run: \|
	npf-run --version
	- name: Unit test
	run: \|
	python -m pytest integration/test_unittest.py
	- name: Run-time tests
	run: \|
	./integration/integration.sh

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