Extra test for object versioning reverse listing

gistfile1.txt

diff --git a/swift/common/middleware/versioned_writes.py b/swift/common/middleware/versioned_writes.py
index 51497c7..a742587 100644
--- a/swift/common/middleware/versioned_writes.py
+++ b/swift/common/middleware/versioned_writes.py
@@ -244,7 +244,7 @@ class VersionedWritesContext(WSGIContext):
             first_item = sublisting[0]['name'].encode('utf-8')
             last_item = sublisting[-1]['name'].encode('utf-8')
             page_is_after_marker = marker and first_item > marker
-            if reverse and (first_item < last_item or page_is_after_marker):
+            if reverse and (first_item <= last_item or page_is_after_marker):
                 # Apparently there's at least one pre-2.6.0 container server
                 yield self._in_proxy_reverse_listing(
                     account_name, lcontainer, lprefix,
diff --git a/test/unit/common/middleware/test_versioned_writes.py b/test/unit/common/middleware/test_versioned_writes.py
index b5ef198..e53ef58 100644
--- a/test/unit/common/middleware/test_versioned_writes.py
+++ b/test/unit/common/middleware/test_versioned_writes.py
@@ -520,6 +520,44 @@ class VersionedWritesTestCase(VersionedWritesBaseTestCase):
             ('DELETE', '/v1/a/ver_cont/001o/2'),
         ])
 
+    def test_delete_single_version_success(self):
+        # check that if the first listing page has just a single item then
+        # it is not erroneously inferred to be a non-reversed listing
+        self.app.register(
+            'DELETE', '/v1/a/c/o', swob.HTTPOk, {}, 'passed')
+        self.app.register(
+            'GET',
+            '/v1/a/ver_cont?format=json&prefix=001o/&marker=&reverse=on',
+            swob.HTTPOk, {},
+            '[{"hash": "y", '
+            '"last_modified": "2014-11-21T14:23:02.206740", '
+            '"bytes": 3, '
+            '"name": "001o/1", '
+            '"content_type": "text/plain"}]')
+        self.app.register(
+            'COPY', '/v1/a/ver_cont/001o/1', swob.HTTPCreated,
+            {}, None)
+        self.app.register(
+            'DELETE', '/v1/a/ver_cont/001o/1', swob.HTTPOk,
+            {}, None)
+
+        cache = FakeCache({'sysmeta': {'versions-location': 'ver_cont'}})
+        req = Request.blank(
+            '/v1/a/c/o',
+            environ={'REQUEST_METHOD': 'DELETE', 'swift.cache': cache,
+                     'CONTENT_LENGTH': '0'})
+        status, headers, body = self.call_vw(req)
+        self.assertEqual(status, '200 OK')
+        self.assertEqual(len(self.authorized), 1)
+        self.assertRequestEqual(req, self.authorized[0])
+
+        prefix_listing_prefix = '/v1/a/ver_cont?format=json&prefix=001o/&'
+        self.assertEqual(self.app.calls, [
+            ('GET', prefix_listing_prefix + 'marker=&reverse=on'),
+            ('COPY', '/v1/a/ver_cont/001o/1'),
+            ('DELETE', '/v1/a/ver_cont/001o/1'),
+        ])
+
     def test_DELETE_on_expired_versioned_object(self):
         self.app.register(
             'GET',