Add tests

[simonw]

Need automated tests against each of the plugin hooks.

I've already figured out patterns for this in these two plugins:

• https://github.com/simonw/django-plugin-django-header/blob/main/tests/test_django_plugin_django_header.py
• https://github.com/simonw/django-plugin-blog/blob/main/tests/test_django_plugin_blog.py

[simonw]

That's annoying: this pattern doesn't work:

from django.test.client import Client
import djp

def test_django_plugins():
    class TestPlugin:
        __name__ = "TestPlugin"

        @djp.hookimpl
        def installed_apps(self):
            return [
                "tests.test_project.app1"
            ]

        @djp.hookimpl
        def middleware(self):
            return [
                "tests.test_project.middleware.Middleware",
                djp.Before("tests.test_project.middleware.MiddlewareBefore"),
                djp.After("tests.test_project.middleware.MiddlewareAfter"),
            ]

    djp.pm.register(TestPlugin(), name="undo")
    try:
        response = Client().get("/")
        request = response._request
        assert hasattr(request, "_notes")
    finally:
        djp.pm.unregister(name="undo")

Because the plugin hooks are only run once when settings.py is first invoked, so modifying plugins in this way has no impact.

[simonw]

So I need to figure out how to put an example plugin somewhere in tests/ and have that loaded when pytest runs but not the rest of the time.