Add migration-example tests to CI

Author: rpkilby

.github/workflows/main.yml

@@ -14,7 +14,7 @@ jobs:
     strategy:
       matrix:
         python-version: ["3.13"]
-        toxenv: ["dist", "lint", "warnings"]
+        toxenv: ["dist", "lint", "warnings", "migration-example"]
     continue-on-error: ${{ matrix.toxenv == 'warnings' }}
 
     steps:

tox.ini

@@ -43,3 +43,8 @@ deps =
 commands = python -Werror manage.py test {posargs: --no-input -v 2}
 deps =
     https://github.com/django/django/archive/master.tar.gz
+
+[testenv:migration-example]
+commands = python manage.py test {posargs: --no-input -v 2}
+changedir = migration-example/
+deps = django