Py3: correctly guess the signature of ObjectPath(...) and Signature(...)

Under Python 2, ObjectPath and Signature are subtypes of str (= bytes),
and the existing type-guessing worked.

The type-guessing code assumed that all unicode objects were just
strings, but that assumption became false in the Python 3 port:
ObjectPath and Signature are still subtypes of str, but str now means
unicode, not bytes.

Bug: https://bugs.freedesktop.org/show_bug.cgi?id=50740

1 files changed, 2 insertions, 0 deletions

diff --git a/test/test-standalone.py b/test/test-standalone.py
index 95b636a..6f403ee 100755
--- a/test/test-standalone.py
+++ b/test/test-standalone.py
@@ -322,6 +322,8 @@ class TestMessageMarshalling(unittest.TestCase):
         aeq(Message.guess_signature(('a',)), '(s)')
         aeq(Message.guess_signature(['a']), 'as')
         aeq(Message.guess_signature({'a':'b'}), 'a{ss}')
+        aeq(Message.guess_signature(types.ObjectPath('/')), 'o')
+        aeq(Message.guess_signature(types.Signature('x')), 'g')
 
     def test_guess_signature_python_ints(self):
         aeq = self.assertEqual