old_contents: import unittest
  from hamcrest import assert_that, equal_to
  import pytz
  from backdrop.core.timeutils import parse_time_as_utc
  from tests.support.test_helpers import d_tz, d
  
  
  class ParseTimeAsUTCTestCase(unittest.TestCase):
      def test_valid_time_string_is_parsed(self):
          assert_that(parse_time_as_utc("2012-12-12T12:12:12+00:00"),
                      equal_to(d_tz(2012, 12, 12, 12, 12, 12)))
  
      def test_time_string_is_converted_to_utc(self):
          assert_that(parse_time_as_utc("2012-12-12T12:12:12+01:00"),
                      equal_to(d_tz(2012, 12, 12, 11, 12, 12)))
  
      def test_invalid_time_string_raises_value_error(self):
          self.assertRaises(ValueError, parse_time_as_utc, "not a date")
  
      def test_datetime_is_converted_to_utc(self):
          us_eastern_time = d_tz(2012, 12, 12, 12,
                                 tzinfo=pytz.timezone("US/Eastern"))
          assert_that(parse_time_as_utc(us_eastern_time),
                      equal_to(d_tz(2012, 12, 12, 17)))
  
      def test_datetime_with_no_timezone_is_given_utc(self):
          assert_that(parse_time_as_utc(d(2012, 12, 12, 12)),
                      equal_to(d_tz(2012, 12, 12, 12)))
  
new_contents: import unittest
  from hamcrest import assert_that, equal_to
  import pytz
  import datetime
  from backdrop.core.timeutils import parse_time_as_utc, as_seconds
  from tests.support.test_helpers import d_tz, d
  
  
  class ParseTimeAsUTCTestCase(unittest.TestCase):
  
      def test_valid_time_string_is_parsed(self):
          assert_that(parse_time_as_utc("2012-12-12T12:12:12+00:00"),
                      equal_to(d_tz(2012, 12, 12, 12, 12, 12)))
  
      def test_time_string_is_converted_to_utc(self):
          assert_that(parse_time_as_utc("2012-12-12T12:12:12+01:00"),
                      equal_to(d_tz(2012, 12, 12, 11, 12, 12)))
  
      def test_invalid_time_string_raises_value_error(self):
          self.assertRaises(ValueError, parse_time_as_utc, "not a date")
  
      def test_datetime_is_converted_to_utc(self):
          us_eastern_time = d_tz(2012, 12, 12, 12,
                                 tzinfo=pytz.timezone("US/Eastern"))
          assert_that(parse_time_as_utc(us_eastern_time),
                      equal_to(d_tz(2012, 12, 12, 17)))
  
      def test_datetime_with_no_timezone_is_given_utc(self):
          assert_that(parse_time_as_utc(d(2012, 12, 12, 12)),
                      equal_to(d_tz(2012, 12, 12, 12)))
  
  
  class TransformTimesTestCase(unittest.TestCase):
  
      def test_datetime_is_converted_to_seconds(self):
          assert_that(
              as_seconds(datetime.datetime(2013, 11, 29, 15, 57, 43, 662372)),
              equal_to(1385740663.0))
  
subject: Test conversion of datetime to seconds