from datetime import datetime
import unittest

from gigasecond import (
    add,
)

# Tests adapted from `problem-specifications//canonical-data.json`


class GigasecondTest(unittest.TestCase):
    def test_date_only_specification_of_time(self):
        self.assertEqual(
            add(datetime(2011, 4, 25, 0, 0)), datetime(2043, 1, 1, 1, 46, 40)
        )

    def test_second_test_for_date_only_specification_of_time(self):
        self.assertEqual(
            add(datetime(1977, 6, 13, 0, 0)), datetime(2009, 2, 19, 1, 46, 40)
        )

    def test_third_test_for_date_only_specification_of_time(self):
        self.assertEqual(
            add(datetime(1959, 7, 19, 0, 0)), datetime(1991, 3, 27, 1, 46, 40)
        )

    def test_full_time_specified(self):
        self.assertEqual(
            add(datetime(2015, 1, 24, 22, 0)), datetime(2046, 10, 2, 23, 46, 40)
        )

    def test_full_time_with_day_roll_over(self):
        self.assertEqual(
            add(datetime(2015, 1, 24, 23, 59, 59)), datetime(2046, 10, 3, 1, 46, 39)
        )


if __name__ == "__main__":
    unittest.main()
