Add pytest workflow and some tests for gen.py (#15)

.github/workflows/pytest.yml

@@ -0,0 +1,25 @@
+name: Run pytest
+
+on: [push]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: ["3.9"]
+
+    steps:
+      - uses: actions/checkout@v3
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v4
+        with:
+          python-version: ${{ matrix.python-version }}
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip pipenv
+          pipenv install --dev
+      - name: Test with pytest
+        run: |
+          pipenv run pytest

Pipfile

@@ -4,6 +4,7 @@ url = "https://pypi.org/simple"
 verify_ssl = true
 
 [dev-packages]
+pytest = "*"
 
 [packages]
 jinja2 = "*"