Further split out pytest; TODO: add tests.

.github/workflows/lint-python.yaml

@@ -10,7 +10,7 @@ jobs:
       - run: pacman --noconfirm -Syu python mypy
       - name: run mypy
         run: mypy . --ignore-missing-imports
-  lint:
+  flake8:
     runs-on: ubuntu-latest
     container:
       image: archlinux:latest
@@ -18,10 +18,23 @@ jobs:
       - uses: actions/checkout@v2
       - run: pacman --noconfirm -Syu python python-pip
       - run: python -m pip install --upgrade pip
-      - run: pip install flake8 pytest
+      - run: pip install flake8
       - name: Lint with flake8
         run: |
           # stop the build if there are Python syntax errors
           flake8 . --count --select=E9,F63,F7 --show-source --statistics
           # exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide
           flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
+  pytest:
+    runs-on: ubuntu-latest
+    container:
+      image: archlinux:latest
+    steps:
+      - uses: actions/checkout@v2
+      - run: pacman --noconfirm -Syu python python-pip
+      - run: python -m pip install --upgrade pip
+      - run: pip install pytest
+      # TODO: Add tests and enable pytest checks.
+#      - name: Test with pytest
+#        run: |
+#          pytest