Add tests for Django Admin page loading

tests/test_admin/test_django_admin_site.py

@@ -0,0 +1,134 @@
+import datetime
+from typing import TYPE_CHECKING
+
+import pytest
+from django.contrib import admin
+from django.test import Client, override_settings
+from django.urls import URLPattern, reverse
+
+from tests import factories
+from tests.helpers import patch_method
+from tests.mocks import MockResponse
+from tests.test_external_services.test_verkkokauppa.test_merchant_requests import get_merchant_response
+from tilavarauspalvelu.enums import EmailType
+from tilavarauspalvelu.models import RequestLog, Reservation, SQLLog
+from tilavarauspalvelu.tasks import create_or_update_reservation_statistics
+from tilavarauspalvelu.utils.verkkokauppa.verkkokauppa_api_client import VerkkokauppaAPIClient
+
+if TYPE_CHECKING:
+    from tests.factories._base import GenericDjangoModelFactory
+
+
+@pytest.fixture
+def create_all_models():
+    """Create a model instance for each factory in tests.factories."""
+    for factory_name in factories.__all__:
+        model_factory: GenericDjangoModelFactory = getattr(factories, factory_name)
+
+        if model_factory is factories.ReservableTimeSpanFactory:
+            model_factory.create(
+                start_datetime=datetime.datetime(2024, 1, 1, 12),
+                end_datetime=datetime.datetime(2024, 1, 1, 22),
+            )
+        else:
+            model_factory.create()
+
+        request_log = RequestLog.objects.create(path="foo", body="bar", duration_ms=123)
+        SQLLog.objects.create(
+            request_log=request_log,
+            sql="SELECT * FROM foo",
+            succeeded=True,
+            duration_ns=123,
+            stack_info="stack_info",
+        )
+
+        create_or_update_reservation_statistics(Reservation.objects.values_list("pk", flat=True))
+
+
+@pytest.mark.django_db
+# Override languages, since TinyMCE can't handle lazy language name translations in tests ¯\_(ツ)_/¯
+@override_settings(LANGUAGES=[("fi", "Finnish"), ("en", "English"), ("sv", "Swedish")])
+@pytest.mark.slow
+@patch_method(VerkkokauppaAPIClient.generic, return_value=MockResponse(status_code=200, json=get_merchant_response))
+def test_django_admin_site__pages_load__model_admins(create_all_models):
+    """Test that all Django admin pages load without errors."""
+    user = factories.UserFactory.create_superuser()
+    client = Client()
+    client.force_login(user)
+
+    # Loop over all models that are registered to the admin site
+    for model, model_admin in admin.site._registry.items():
+        # Only test models from tilavarauspalvelu app
+        if model._meta.app_label != "tilavarauspalvelu":
+            continue
+
+        url_pattern: URLPattern
+        for url_pattern in model_admin.urls:
+            # List & Add new views
+            if url_pattern.lookup_str.endswith((".changelist_view", ".add_view")):
+                admin_url = reverse(f"admin:{url_pattern.name}")
+
+                assert client.get(admin_url).status_code == 200, admin_url
+
+            # Edit & Delete views
+            elif url_pattern.lookup_str.endswith((".change_view", ".delete_view")):
+                first_object = model.objects.first()
+                admin_url = reverse(f"admin:{url_pattern.name}", args=[first_object.pk])
+
+                assert client.get(admin_url).status_code == 200, admin_url
+
+            # Skipped views
+            elif (
+                # History & Redirect to Edit view
+                url_pattern.lookup_str.endswith((".history_view", ".RedirectView"))
+                # Custom views
+                or url_pattern.lookup_str.startswith(
+                    (
+                        "adminsortable2.",  # Updating the rank field order when moving instances in the list view
+                        "admin_extra_buttons.",  # Custom admin views
+                        "import_export.",  # Import/export views
+                    )
+                )
+            ):
+                continue
+            else:
+                pytest.fail(f"Unknown lookup_str = {url_pattern}")
+
+
+@pytest.mark.django_db
+@pytest.mark.slow
+def test_django_admin_site__pages_load__data_views():
+    """Test that all Django Admin data views load"""
+    user = factories.UserFactory.create_superuser()
+    client = Client()
+    client.force_login(user)
+
+    url_pattern: URLPattern
+    for url_pattern in admin.site.get_admin_data_urls():
+        # Views that we don't really want to test
+        if url_pattern.lookup_str.endswith(
+            (
+                ".download_json",  # Doesn't accept GET requests
+                ".download_csv",  # Doesn't accept GET requests
+                ".text_search_list_view",  # Does not work with LocMemCache
+                "_redirect_view",
+            )
+        ):
+            continue
+
+        # Handle views that take arguments
+        if url_pattern.pattern.converters:
+            converter = next(iter(url_pattern.pattern.converters))
+            if converter == "email_type":
+                # Test with all email types
+                for email_type in EmailType:
+                    admin_url = reverse(f"admin:{url_pattern.name}", args=[email_type.value])
+                    assert client.get(admin_url).status_code == 200, admin_url
+            else:
+                raise pytest.fail(f"Unknown converter = {converter}")
+
+        # Views that don't take arguments
+        else:
+            admin_url = reverse(f"admin:{url_pattern.name}")
+
+            assert client.get(admin_url).status_code == 200, admin_url