Refs #15035 -- Corrected a bug and improved comments for a staticfiles test.

tests/staticfiles_tests/storage.py

@@ -10,7 +10,8 @@ from django.utils import timezone
 
 class DummyStorage(storage.Storage):
     """
-    A storage class that implements get_modified_time().
+    A storage class that implements get_modified_time() but raises
+    NotImplementedError for path().
     """
     def _save(self, name, content):
         return 'dummy'
@@ -22,7 +23,7 @@ class DummyStorage(storage.Storage):
         pass
 
     def get_modified_time(self, name):
-        return datetime.datetime(1970, 1, 1, tzinfo=timezone.utc)
+        return datetime(1970, 1, 1, tzinfo=timezone.utc)
 
 
 class PathNotImplementedStorage(storage.Storage):

tests/staticfiles_tests/test_management.py

 from __future__ import unicode_literals
 
 import codecs
+import datetime
 import os
 import shutil
 import tempfile
@@ -15,7 +16,7 @@ from django.core.exceptions import ImproperlyConfigured
 from django.core.management import call_command
 from django.test import mock, override_settings
 from django.test.utils import extend_sys_path
-from django.utils import six
+from django.utils import six, timezone
 from django.utils._os import symlinks_supported
 from django.utils.encoding import force_text
 from django.utils.functional import empty
@@ -387,9 +388,15 @@ class TestCollectionOverwriteWarning(CollectionTestCase):
 @override_settings(STATICFILES_STORAGE='staticfiles_tests.storage.DummyStorage')
 class TestCollectionNonLocalStorage(TestNoFilesCreated, CollectionTestCase):
     """
-    Tests for #15035
+    Tests for a Storage that implements get_modified_time() but not path()
+    (#15035).
     """
-    pass
+    def test_storage_properties(self):
+        # Properties of the Storage as described in the ticket.
+        storage = DummyStorage()
+        self.assertEqual(storage.get_modified_time('name'), datetime.datetime(1970, 1, 1, tzinfo=timezone.utc))
+        with self.assertRaisesMessage(NotImplementedError, "This backend doesn't support absolute paths."):
+            storage.path('name')
 
 
 @unittest.skipUnless(symlinks_supported(), "Must be able to symlink to run this test.")