def test_correctly_changes_hours_and_minutes(self):
# Test to see if hours and minutes correctly subtract
initial = datetime(2017, 1, 1, 1, 59)
t = TimeZoneConverter("-01:59")
expected = datetime(2017, 1, 1)
self.assertEqual(t.convert(initial), expected)
# Test to see if they correctly add
t = TimeZoneConverter("+01:02")
expected = datetime(2017, 1, 1, 3, 1)
self.assertEqual(t.convert(initial), expected)
def test_correctly_changes_day(self):
# See if time rolls back
initial = datetime(2017, 1, 1)
t = TimeZoneConverter("-01:00")
expected = datetime(2016, 12, 31, 23, 0)
self.assertEqual(t.convert(initial), expected)
# See if time rolls forward
t = TimeZoneConverter("+24:30")
expected = datetime(2017, 1, 2, 0, 30)
self.assertEqual(t.convert(initial), expected)