fix formatTime for DateTime

Related: https://pagure.io/koji/issue/623

tests/test_lib/test_format_time.py

@@ -0,0 +1,48 @@
+from __future__ import absolute_import
+import datetime
+import unittest
+import six.moves.xmlrpc_client as xmlrpc_client
+
+from koji import formatTime, formatTimeLong
+
+class TestFormatTime(unittest.TestCase):
+    def test_format_time(self):
+        self.assertEqual(formatTime(None), '')
+        self.assertEqual(formatTime(''), '')
+
+        desired = '2017-10-05 09:52:31'
+        # datetime
+        d = datetime.datetime(year=2017, month=10, day=5, hour=9, minute=52, second=31, microsecond=12)
+        self.assertEqual(formatTime(d), desired)
+
+        # DateTime
+        d1 = xmlrpc_client.DateTime(d)
+        self.assertEqual(formatTime(d1), desired)
+
+        # str
+        self.assertEqual(formatTime(desired), desired)
+
+        # str + microseconds
+        self.assertEqual(formatTime(desired + '.123'), desired)
+
+    def test_format_time_long(self):
+        self.assertEqual(formatTimeLong(None), '')
+        self.assertEqual(formatTimeLong(''), '')
+
+        desired = 'Thu, 05 Oct 2017 09:52:31 CEST'
+
+        # datetime
+        d = datetime.datetime(year=2017, month=10, day=5, hour=9, minute=52, second=31, microsecond=12)
+        self.assertEqual(formatTimeLong(d), desired)
+
+        # DateTime
+        d1 = xmlrpc_client.DateTime(d)
+        self.assertEqual(formatTimeLong(d1), desired)
+
+        # str
+        d2 = '2017-10-05 09:52:31'
+        self.assertEqual(formatTimeLong(d2), desired)
+
+        # str + microseconds
+        self.assertEqual(formatTimeLong(d2 + '.123'), desired)
+