Fix an error when adding an interval to a pendulum instance across DST transition

Author: sdispater

CHANGELOG.md

@@ -1,5 +1,12 @@
 # Change Log
 
+## [Unreleased]
+
+### Fixed
+
+- Fixed an error when adding intervals to a Pendulum instance across DST transition.
+
+
 ## [1.4.2] - 2018-02-22
 
 ### Fixed

pendulum/pendulum.py

@@ -1233,8 +1233,7 @@ def add_timedelta(self, delta):
                 seconds=delta.remaining_seconds, microseconds=delta.microseconds
             )
 
-        return self.add(days=delta.days, seconds=delta.seconds,
-                        microseconds=delta.microseconds)
+        return self.add(seconds=delta.total_seconds())
 
     def subtract_timedelta(self, delta):
         """

tests/pendulum_tests/test_add.py

@@ -236,3 +236,9 @@ def test_add_time_to_new_transition_does_not_use_transition_rule(self):
         self.assertEqual('Europe/Paris', dt.timezone_name)
         self.assertEqual(7200, dt.offset)
         self.assertTrue(dt.is_dst)
+
+    def test_add_interval(self):
+        dt = pendulum.create(2017, 3, 11, 10, 45, tz='America/Los_Angeles')
+        new = dt + pendulum.interval(hours=24)
+
+        self.assertPendulum(new, 2017, 3, 12, 11, 45)