django 3-4 migration: unittests gh workflow

.github/workflows/unittests.yml

@@ -0,0 +1,58 @@
+name: unittests
+
+on:
+  pull_request:
+    branches:
+      - master
+
+jobs:
+  main:
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        python:
+          - "3.8"
+          - "3.9"
+          - "3.10"
+          - "3.11"
+        django:
+          - "3.2"
+          - "4.0"
+          - "4.1"
+          - "4.2"
+
+    env:
+      DJANGO_SETTINGS_MODULE: sites.test.settings
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+
+      - name: Set up Python ${{ matrix.python }}
+        uses: actions/setup-python@v4
+        with:
+          python-version: ${{ matrix.python }}
+
+      - name: Set up pip
+        run: |
+          python -m pip install --upgrade pip
+
+      - name: Install Django ${{ matrix.django }}
+        run: |
+          DJANGO_VERSION_MAJOR=$(echo ${{ matrix.django }} | cut -d. -f1)
+          DJANGO_VERSION_NEXT_MINOR=$(($(echo ${{ matrix.django }} | cut -d. -f2) + 1))
+          python -m pip install "Django>=${{ matrix.django }},<$DJANGO_VERSION_MAJOR.$DJANGO_VERSION_NEXT_MINOR"
+
+      - name: Install django-admin-sortable2 for Django 3.2
+        if: ${{ matrix.django == '3.2' }}
+        run: |
+          python -m pip install django-admin-sortable2==1.0.4
+
+      - name: Install dependencies
+        run: |
+          python -m pip install -r requirements.test.txt
+
+      - name: Test
+        run: |
+          py.test tests