# How to test CAS as a developer without a server The [django-mama-cas](https://github.com/jbittel/django-mama-cas) project is an easy to run CAS implementation built on top of Django. ## Prerequisites 1. Create a new virtualenv: `python3 -m venv <your virtualenv>` 2. Activate your virtualenv: `source /path/to/your/virtualenv/bin/activate` 3. Install Django and django-mama-cas: ``` python -m pip install "django<3" "django-mama-cas==2.4.0" ``` 4. Create a Django project in the current directory: ``` django-admin startproject cas_test . ``` 5. Follow the [install directions](https://django-mama-cas.readthedocs.io/en/latest/installation.html#configuring) for django-mama-cas 6. Setup the SQLite database: `python manage.py migrate` 7. Create a user: ``` python manage.py createsuperuser ``` 1. Use whatever you want as the username and password. 2. Leave the other fields blank. 8. Use the built-in Django test server to serve the CAS endpoints on port 8000: ``` python manage.py runserver ``` You should now have a Django project configured to serve CAS authentication with a single user created. ## Configure Synapse (and Element) to use CAS 1. Modify your `homeserver.yaml` to enable CAS and point it to your locally running Django test server: ```yaml cas_config: enabled: true server_url: "http://localhost:8000" service_url: "http://localhost:8081" #displayname_attribute: name #required_attributes: # name: value ``` 2. Restart Synapse. Note that the above configuration assumes the homeserver is running on port 8081 and that the CAS server is on port 8000, both on localhost. ## Testing the configuration Then in Element: 1. Visit the login page with a Element pointing at your homeserver. 2. Click the Single Sign-On button. 3. Login using the credentials created with `createsuperuser`. 4. You should be logged in. If you want to repeat this process you'll need to manually logout first: 1. http://localhost:8000/admin/ 2. Click "logout" in the top right.