from __future__ import unicode_literals
from hl7.datatypes import parse_datetime, _UTCOffset
from .compat import unittest
from datetime import datetime


class DatetimeTest(unittest.TestCase):
    def test_parse_date(self):
        self.assertEqual(datetime(1901, 2, 13), parse_datetime("19010213"))

    def test_parse_datetime(self):
        self.assertEqual(datetime(2014, 3, 11, 14, 25, 33), parse_datetime("20140311142533"))

    def test_parse_datetime_frac(self):
        self.assertEqual(datetime(2014, 3, 11, 14, 25, 33, 100000), parse_datetime("20140311142533.1"))
        self.assertEqual(datetime(2014, 3, 11, 14, 25, 33, 10000), parse_datetime("20140311142533.01"))
        self.assertEqual(datetime(2014, 3, 11, 14, 25, 33, 1000), parse_datetime("20140311142533.001"))
        self.assertEqual(datetime(2014, 3, 11, 14, 25, 33, 100), parse_datetime("20140311142533.0001"))

    def test_parse_tz(self):
        self.assertEqual(datetime(2014, 3, 11, 14, 12, tzinfo=_UTCOffset(330)), parse_datetime("201403111412+0530"))
        self.assertEqual(datetime(2014, 3, 11, 14, 12, 20, tzinfo=_UTCOffset(-300)), parse_datetime("20140311141220-0500"))

    def test_tz(self):
        self.assertEqual("+0205", _UTCOffset(125).tzname(datetime.utcnow()))
        self.assertEqual("-0410", _UTCOffset(-250).tzname(datetime.utcnow()))