test: scaffold a test app

tests/settings.py

@@ -0,0 +1,26 @@
+from __future__ import annotations
+
+from pathlib import Path
+
+BASE_DIR = Path(__file__).resolve().parent
+
+SECRET_KEY = "NOTASECRET"  # noqa S105
+
+DATABASES = {
+    "default": {
+        "ENGINE": "django.db.backends.sqlite3",
+        "NAME": ":memory:",
+        "ATOMIC_REQUESTS": True,
+    },
+}
+
+TIME_ZONE = "UTC"
+
+INSTALLED_APPS = [
+    "tests.testapp",
+    "remake_migrations",
+    # Force django_migrations creation by having an app with migrations:
+    "django.contrib.contenttypes",
+]
+
+USE_TZ = True

tests/testapp/apps.py

@@ -0,0 +1,8 @@
+from __future__ import annotations
+
+from django.apps import AppConfig
+
+
+class TestAppConfig(AppConfig):
+    name = "tests.testapp"
+    verbose_name = "Test App"

tests/testapp/models.py

@@ -0,0 +1,7 @@
+from __future__ import annotations
+
+from django.db import models
+
+
+class Book(models.Model):
+    pass