fix: address review feedback on RSS GUID stability

Import _build_tag_fragment from feeds.py in unit tests instead of
duplicating the function. Add pytest-django to unittest_requirements.txt
to support the Django import. Use single backticks in the docstring.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Signed-off-by: Ryan Petrello <ryan@ryanpetrello.com>

Author: ryanpetrello

pulp_python/app/pypi/feeds.py

@@ -98,7 +98,7 @@ def iter_projects(content, repo_ver, limit=PACKAGES_LIMIT):
 def _build_tag_fragment(filenames):
     """Extract sorted distinct build tags from wheel filenames for GUID stability.
 
-    Returns a fragment like ``#builds=1,2`` when build tags are present,
+    Returns a fragment like `#builds=1,2` when build tags are present,
     or an empty string for sdists and wheels without build tags.
     """
     tags = set()

pulp_python/tests/unit/test_feeds.py

@@ -1,21 +1,6 @@
-import re
-
 import pytest
 
-# Duplicated here to avoid importing feeds.py, which pulls in Django/DRF and
-# requires a configured Django settings module that the unit test runner lacks.
-_WHEEL_BUILD_TAG_RE = re.compile(r"^.+?-.+?-(?P<build>\d[^-]*?)-[^-]+-[^-]+-[^-]+\.whl$")
-
-
-def _build_tag_fragment(filenames):
-    tags = set()
-    for fn in filenames or ():
-        m = _WHEEL_BUILD_TAG_RE.match(fn)
-        if m:
-            tags.add(m.group("build"))
-    if not tags:
-        return ""
-    return "#builds=" + ",".join(sorted(tags))
+from pulp_python.app.pypi.feeds import _build_tag_fragment
 
 
 @pytest.mark.parametrize(

unittest_requirements.txt

@@ -1,2 +1,3 @@
 mock
 pytest<8
+pytest-django