Chore: Add a shared test support layer

All four Django apps have test code in common, but the only place to put it
was the documents app's own tests package, so paperless, paperless_ai and
paperless_mail each reached across an app boundary to import helpers and
relied on fixtures that were only defined for the documents test path.

This adds a root src/conftest.py holding the fixtures every app needs and an
new src/paperless_testing package for shared helpers a test names

.dockerignore

@@ -15,6 +15,8 @@
 # Test related
 **/.pytest_cache
 **/tests
+src/paperless_testing
+src/conftest.py
 **/*.spec.ts
 **/htmlcov
 # Local folders

pyproject.toml

@@ -339,6 +339,8 @@ omit = [
   "manage.py",
   "paperless/auth.py",
   "paperless/wsgi.py",
+  "src/conftest.py",
+  "src/paperless_testing/*",
 ]
 [tool.coverage.report]
 exclude_also = [

src/conftest.py

@@ -0,0 +1,35 @@
+"""Fixtures available to every Paperless-ngx app.
+
+Loaded automatically for every test path. Keep module-scope imports minimal:
+this file is imported for every session,  so anything heavy belongs inside
+the fixture body that needs it.
+"""
+
+import pytest
+
+
+@pytest.fixture(scope="session", autouse=True)
+def faker_session_locale() -> str:
+    """Set Faker locale for reproducibility."""
+    return "en_US"
+
+
+@pytest.fixture(scope="session", autouse=True)
+def faker_seed() -> int:
+    return 12345
+
+
+@pytest.fixture(autouse=True)
+def _clear_content_type_caches() -> None:
+    """Clear Django's ContentType cache and guardian's lru_cache before each test.
+
+    Tests that delete and reinsert ContentType/Permission rows (e.g. the
+    importer) corrupt both caches. Without this fixture a subsequent test on
+    the same xdist worker sees stale ContentType objects and guardian raises
+    MixedContentTypeError.
+    """
+    from django.contrib.contenttypes.models import ContentType
+    from guardian.shortcuts import clear_ct_cache
+
+    ContentType.objects.clear_cache()
+    clear_ct_cache()

src/documents/tests/conftest.py

@@ -7,8 +7,6 @@ from typing import TYPE_CHECKING
 import filelock
 import pytest
 from django.contrib.auth import get_user_model
-from django.contrib.contenttypes.models import ContentType
-from guardian.shortcuts import clear_ct_cache
 from pytest_django.fixtures import Settings
 from rest_framework.test import APIClient
 
@@ -154,30 +152,6 @@ def user_client(rest_api_client: APIClient, regular_user: UserModelT) -> APIClie
     return rest_api_client
 
 
-@pytest.fixture(autouse=True)
-def _clear_content_type_caches() -> None:
-    """Clear Django's ContentType cache and guardian's lru_cache before each test.
-
-    Tests that delete and reinsert ContentType/Permission rows (e.g. the
-    importer) corrupt both caches. Without this fixture a subsequent test on
-    the same xdist worker sees stale ContentType objects and guardian raises
-    MixedContentTypeError.
-    """
-    ContentType.objects.clear_cache()
-    clear_ct_cache()
-
-
-@pytest.fixture(scope="session", autouse=True)
-def faker_session_locale():
-    """Set Faker locale for reproducibility."""
-    return "en_US"
-
-
-@pytest.fixture(scope="session", autouse=True)
-def faker_seed():
-    return 12345
-
-
 @pytest.fixture
 def indexed_document(_search_index: None) -> "Document":
     """One searchable document, for tests about what the search endpoint

src/paperless_testing/__init__.py

@@ -0,0 +1,5 @@
+"""Shared test support for every Paperless-ngx app.
+
+Fixtures live in ``src/conftest.py``; anything a test imports by name lives
+here. App-specific helpers stay in that app's ``tests`` package.
+"""