Add pytest pipeline stage

.github/workflows/pytest.yml

@@ -0,0 +1,26 @@
+---  # Pytest github action file
+name: Pytest and Coverage
+
+on: [push]  # yamllint disable-line rule:truthy
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: ["3.10"]
+    steps:
+      - uses: actions/checkout@v3
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v3
+        with:
+          python-version: ${{ matrix.python-version }}
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install -r tests/requirements.txt
+          pip install coverage pytest
+      - name: Execute pytests to avoid regressions
+        run: |
+          coverage run -m pytest tests/ -v
+          coverage report