Refs #21221 -- Deprecated staticfiles and admin_static template tag libraries.

tests/admin_views/test_static_deprecation.py

@@ -0,0 +1,30 @@
+import warnings
+
+from django.contrib.admin.templatetags.admin_static import static
+from django.contrib.staticfiles.storage import staticfiles_storage
+from django.test import SimpleTestCase
+from django.utils.deprecation import RemovedInDjango30Warning
+
+
+class AdminStaticDeprecationTests(SimpleTestCase):
+    def test(self):
+        """
+        admin_static.static points to the collectstatic version
+        (as django.contrib.collectstatic is in INSTALLED_APPS).
+        """
+        msg = (
+            '{% load admin_static %} is deprecated in favor of '
+            '{% load static %}.'
+        )
+        old_url = staticfiles_storage.base_url
+        staticfiles_storage.base_url = '/test/'
+        try:
+            with warnings.catch_warnings(record=True) as recorded:
+                warnings.simplefilter('always')
+                url = static('path')
+            self.assertEqual(url, '/test/path')
+            self.assertEqual(len(recorded), 1)
+            self.assertIs(recorded[0].category, RemovedInDjango30Warning)
+            self.assertEqual(str(recorded[0].message), msg)
+        finally:
+            staticfiles_storage.base_url = old_url