Add test cases to test_strptime.py

Author: donbarbos

Lib/test/test_strptime.py

@@ -383,6 +383,12 @@ def test_offset(self):
         one_hour = 60 * 60
         half_hour = 30 * 60
         half_minute = 30
+        (*_, offset), _, offset_fraction = _strptime._strptime("+09", "%z")
+        self.assertEqual(offset, 9 * one_hour)
+        self.assertEqual(offset_fraction, 0)
+        (*_, offset), _, offset_fraction = _strptime._strptime("-01", "%z")
+        self.assertEqual(offset, -one_hour)
+        self.assertEqual(offset_fraction, 0)
         (*_, offset), _, offset_fraction = _strptime._strptime("+0130", "%z")
         self.assertEqual(offset, one_hour + half_hour)
         self.assertEqual(offset_fraction, 0)