new_contents: import datetime as dt
  from pytest import raises
  
  from gitfs.utils import strptime
  
  
  class TestDateTimeUtils(object):
  
      def test_strptime(self):
          date = dt.date(2014, 8, 21)
          datetime = dt.datetime(2014, 8, 21, 1, 2, 3)
          assert strptime("2014-08-21 01:02:03", "%Y-%m-%d %H:%M:%S") == date
          assert strptime("2014-08-21 01:02:03", "%Y-%m-%d %H:%M:%S", to_datetime=True) == datetime
  
  
          date = dt.date(2014, 8, 30)
          datetime = dt.datetime(2014, 8, 30, 1, 2, 3)
          assert strptime("30 Aug 14 01:02:03", "%d %b %y %H:%M:%S") == date
          assert strptime("30 Aug 14 01:02:03", "%d %b %y %H:%M:%S", to_datetime=True) == datetime
  
          date = dt.date(1970, 1, 1)
          datetime = dt.datetime(1970, 1, 1, 13, 30)
          assert strptime("1 Jan 70 1:30pm", "%d %b %y %I:%M%p") == date
          assert strptime("1 Jan 70 1:30pm", "%d %b %y %I:%M%p", to_datetime=True) == datetime
  
          with raises(ValueError):
              strptime("31 Nov 14 01:02:03", "%d %b %y %H:%M:%S")
  
subject: Add test for the strptime util