GitHub workflows: join into single CI workflow w/ 2 jobs

.github/workflows/flake8.yml

@@ -1,4 +1,4 @@
-name: Flake8
+name: Continuous Integration
 
 on:
   push:
@@ -7,8 +7,8 @@ on:
     branches: [ "main" ]
 
 jobs:
-  build:
 
+  flake8:
     runs-on: ubuntu-latest
     strategy:
       matrix:
@@ -30,3 +30,28 @@ jobs:
         # https://github.com/PyCQA/flake8/issues/515 shows a dead end of doing this "properly"
         # so we just specify it on the command line
         flake8 --extend-ignore=E127,E741,E501 `git ls-files | grep py$`
+
+  tests:
+    runs-on: ubuntu-latest
+    strategy:
+      max-parallel: 4
+      matrix:
+        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12"]
+
+    steps:
+    - uses: actions/checkout@v4
+    - name: Set up Python ${{ matrix.python-version }}
+      uses: actions/setup-python@v5
+      with:
+        python-version: ${{ matrix.python-version }}
+    - name: Create wheel and install it
+      run: |
+        python -m pip install --upgrade pip
+        pip install build
+        python -m build .
+        pip install django
+        pip install dist/*.whl
+    - name: Run Tests
+      run: |
+        cd example_django_project
+        python -Wall manage.py test snappea