tests: verify stable releases have stable dependencies

Author: jerivas

setup.cfg

@@ -41,15 +41,15 @@ include_package_data = true
 install_requires =
     django-contrib-comments >= 1.9
     django >= 2.2
-    filebrowser-safe >= 0.5
-    grappelli-safe >= 0.5
     tzlocal >= 2
     bleach >= 2
     beautifulsoup4 >= 4.5.3
     requests >= 2.1.0
     requests-oauthlib >= 1.3
     pillow >= 7
-    chardet
+    chardet >= 4
+    filebrowser_safe@https://github.com/stephenmcd/filebrowser-safe/archive/master.tar.gz
+    grappelli_safe@https://github.com/stephenmcd/grappelli-safe/archive/master.tar.gz
 
 [options.extras_require]
 testing =

tests/test_core.py

@@ -1,7 +1,9 @@
 import re
+import subprocess
 from unittest import skipUnless
 from urllib.parse import urlencode
 
+import pkg_resources
 import pytest
 import pytz
 from django.conf.urls import url
@@ -45,6 +47,31 @@
 from mezzanine.utils.tests import TestCase
 from mezzanine.utils.urls import admin_url
 
+BRANCH_NAME = (
+    subprocess.check_output(["git", "rev-parse", "--abbrev-ref", "HEAD"])
+    .decode()
+    .strip()
+)
+VERSION_WARN = (
+    "Unpinned or pre-release dependencies detected in Mezzanine's requirements: {}"
+)
+
+
+@pytest.mark.skipif(
+    BRANCH_NAME != "stable", reason="Only runs when publishing stable releases"
+)
+def test_stable_dependencies():
+    """
+    This test is meant for CI. We want to make sure that when building the `stable`
+    branch of Mezzanine the dependencies are also stable so that we don't publish a
+    stable Mezzanine release with unstable dependencies.
+    """
+    # If a requirement is listed via a git or http url the `specs` attribute will be an
+    # empty list, so we use it to check for "pre-release" status
+    requirements = pkg_resources.working_set.by_key["mezzanine"].requires()
+    prereleases = [r.name for r in requirements if not r.specs]
+    assert not prereleases, VERSION_WARN.format(", ".join(prereleases))
+
 
 class CoreTests(TestCase):
     def test_tagcloser(self):

tox.ini

@@ -9,8 +9,6 @@ envlist =
 usedevelop = true
 deps =
     .[testing]
-    https://github.com/stephenmcd/filebrowser-safe/archive/master.tar.gz#egg=filebrowser_safe
-    https://github.com/stephenmcd/grappelli-safe/archive/master.tar.gz#egg=grappelli_safe
     dj22: Django>=2.2, <3
     dj30: Django>=3.0, <3.1
     dj31: Django>=3.1, <3.2