Class TestTZVar

tests/test_parser.py:890–924

@pytest.mark.skipif(IS_WIN, reason="Windows does not use TZ var")
class TestTZVar(object):
    def test_parse_unambiguous_nonexistent_local(self):
        # When dates are specified "EST" even when they should be "EDT" in the
        # local time zone, we should still assign the local time zone
        with TZEnvContext('EST+5EDT,M3.2.0/2,M11.1.0/2'):
            dt_exp = datetime(2011, 8, 1, 12, 30, tzinfo=tz.tzlocal())
            dt = parse('2011-08-01T12:30 EST')

            assert dt.tzname() == 'EDT'
            assert dt == dt_exp

    def test_tzlocal_in_gmt(self):
        # GH #318
        with TZEnvContext('GMT0BST,M3.5.0,M10.5.0'):
            # This is an imaginary datetime in tz.tzlocal() but should still
            # parse using the GMT-as-alias-for-UTC rule
            dt = parse('2004-05-01T12:00 GMT')
            dt_exp = datetime(2004, 5, 1, 12, tzinfo=tz.UTC)

            assert dt == dt_exp

    def test_tzlocal_parse_fold(self):
        # One manifestion of GH #318
        with TZEnvContext('EST+5EDT,M3.2.0/2,M11.1.0/2'):
            dt_exp = datetime(2011, 11, 6, 1, 30, tzinfo=tz.tzlocal())
            dt_exp = tz.enfold(dt_exp, fold=1)
            dt = parse('2011-11-06T01:30 EST')

            # Because this is ambiguous, until `tz.tzlocal() is tz.tzlocal()`
            # we'll just check the attributes we care about rather than
            # dt == dt_exp
            assert dt.tzname() == dt_exp.tzname()
            assert dt.replace(tzinfo=None) == dt_exp.replace(tzinfo=None)
            assert getattr(dt, 'fold') == getattr(dt_exp, 'fold')
            assert dt.astimezone(tz.UTC) == dt_exp.astimezone(tz.UTC)


def test_parse_tzinfos_fold():