Fix utcoffset (#66)

* Fix utcoffset

* Add test for utcoffset

* Fix test

Author: regnarock

pendulum/tz/timezone.py

@@ -280,7 +280,7 @@ def utcoffset(self, dt):
         elif dt.tzinfo.tz is not self:
             dt = self.convert(dt)
 
-            return dt.adjusted_offset
+            return dt.tzinfo.adjusted_offset
 
         return dt.utcoffset(dt)
 

tests/tz_tests/test_timezone.py

@@ -1,7 +1,7 @@
 # -*- coding: utf-8 -*-
 
 import pendulum
-from datetime import datetime
+from datetime import datetime, timedelta
 from pendulum import timezone
 from pendulum.tz.exceptions import NonExistingTime, AmbiguousTime
 
@@ -146,3 +146,8 @@ def test_create_uses_transition_rule(self):
         self.assertEqual('Europe/Paris', dt.timezone_name)
         self.assertEqual(3600, dt.offset)
         self.assertFalse(dt.is_dst)
+
+    def test_utcoffset(self):
+        tz = pendulum.timezone('Europe/Paris')
+        utcoffset = tz.utcoffset(pendulum.utcnow())
+        self.assertEqual(utcoffset, timedelta(0, 3600))