FIX tox/requirements

Author: ankostis

Diff for: git/test/test_index.py

@@ -731,9 +731,9 @@ def make_paths():
             except HookExecutionError as err:
                 if is_win:
                     self.assertIsInstance(err.status, OSError)
-                    self.assertEqual(err.command, hp)
-                    self.assertIsNone(err.stdout)
-                    self.assertIsNone(err.stderr)
+                    self.assertEqual(err.command, [hp])
+                    self.assertEqual(err.stdout, '')
+                    self.assertEqual(err.stderr, '')
                     assert str(err)
                 else:
                     self.assertEqual(err.status, 1)

Diff for: requirements.txt

@@ -1 +1,3 @@
 gitdb>=0.6.4
+ddt
+mock