clock_test.py

import unittest

from clock import Clock


# Tests adapted from `problem-specifications//canonical-data.json` @ v2.2.1

class ClockTest(unittest.TestCase):
    # Test creating a new clock with an initial time.
    def test_on_the_hour(self):
        self.assertEqual(str(Clock(8, 0)), '08:00')

    def test_past_the_hour(self):
        self.assertEqual(str(Clock(11, 9)), '11:09')

    def test_midnight_is_zero_hours(self):
        self.assertEqual(str(Clock(24, 0)), '00:00')

    def test_hour_rolls_over(self):
        self.assertEqual(str(Clock(25, 0)), '01:00')

    def test_hour_rolls_over_continuously(self):
        self.assertEqual(str(Clock(100, 0)), '04:00')

    def test_sixty_minutes_is_next_hour(self):
        self.assertEqual(str(Clock(1, 60)), '02:00')

    def test_minutes_roll_over(self):
        self.assertEqual(str(Clock(0, 160)), '02:40')

    def test_minutes_roll_over_continuously(self):
        self.assertEqual(str(Clock(0, 1723)), '04:43')

    def test_hour_and_minutes_roll_over(self):
        self.assertEqual(str(Clock(25, 160)), '03:40')

    def test_hour_and_minutes_roll_over_continuously(self):
        self.assertEqual(str(Clock(201, 3001)), '11:01')

    def test_hour_and_minutes_roll_over_to_exactly_midnight(self):
        self.assertEqual(str(Clock(72, 8640)), '00:00')

    def test_negative_hour(self):
        self.assertEqual(str(Clock(-1, 15)), '23:15')

    def test_negative_hour_rolls_over(self):
        self.assertEqual(str(Clock(-25, 0)), '23:00')

    def test_negative_hour_rolls_over_continuously(self):
        self.assertEqual(str(Clock(-91, 0)), '05:00')

    def test_negative_minutes(self):
        self.assertEqual(str(Clock(1, -40)), '00:20')

    def test_negative_minutes_roll_over(self):
        self.assertEqual(str(Clock(1, -160)), '22:20')

    def test_negative_minutes_roll_over_continuously(self):
        self.assertEqual(str(Clock(1, -4820)), '16:40')

    def test_negative_hour_and_minutes_both_roll_over(self):
        self.assertEqual(str(Clock(-25, -160)), '20:20')

    def test_negative_hour_and_minutes_both_roll_over_continuously(self):
        self.assertEqual(str(Clock(-121, -5810)), '22:10')

    # Test adding and subtracting minutes.
    def test_add_minutes(self):
        self.assertEqual(str(Clock(10, 0) + 3), '10:03')

    def test_add_no_minutes(self):
        self.assertEqual(str(Clock(6, 41) + 0), '06:41')

    def test_add_to_next_hour(self):
        self.assertEqual(str(Clock(0, 45) + 40), '01:25')

    def test_add_more_than_one_hour(self):
        self.assertEqual(str(Clock(10, 0) + 61), '11:01')

    def test_add_more_than_two_hours_with_carry(self):
        self.assertEqual(str(Clock(0, 45) + 160), '03:25')

    def test_add_across_midnight(self):
        self.assertEqual(str(Clock(23, 59) + 2), '00:01')

    def test_add_more_than_one_day(self):
        self.assertEqual(str(Clock(5, 32) + 1500), '06:32')

    def test_add_more_than_two_days(self):
        self.assertEqual(str(Clock(1, 1) + 3500), '11:21')

    def test_subtract_minutes(self):
        self.assertEqual(str(Clock(10, 3) - 3), '10:00')

    def test_subtract_to_previous_hour(self):
        self.assertEqual(str(Clock(10, 3) - 30), '09:33')

    def test_subtract_more_than_an_hour(self):
        self.assertEqual(str(Clock(10, 3) - 70), '08:53')

    def test_subtract_across_midnight(self):
        self.assertEqual(str(Clock(0, 3) - 4), '23:59')

    def test_subtract_more_than_two_hours(self):
        self.assertEqual(str(Clock(0, 0) - 160), '21:20')

    def test_subtract_more_than_two_hours_with_borrow(self):
        self.assertEqual(str(Clock(6, 15) - 160), '03:35')

    def test_subtract_more_than_one_day(self):
        self.assertEqual(str(Clock(5, 32) - 1500), '04:32')

    def test_subtract_more_than_two_days(self):
        self.assertEqual(str(Clock(2, 20) - 3000), '00:20')

    # Construct two separate clocks, set times, test if they are equal.
    def test_clocks_with_same_time(self):
        self.assertEqual(Clock(15, 37), Clock(15, 37))

    def test_clocks_a_minute_apart(self):
        self.assertNotEqual(Clock(15, 36), Clock(15, 37))

    def test_clocks_an_hour_apart(self):
        self.assertNotEqual(Clock(14, 37), Clock(15, 37))

    def test_clocks_with_hour_overflow(self):
        self.assertEqual(Clock(10, 37), Clock(34, 37))

    def test_clocks_with_hour_overflow_by_several_days(self):
        self.assertEqual(Clock(3, 11), Clock(99, 11))

    def test_clocks_with_negative_hour(self):
        self.assertEqual(Clock(22, 40), Clock(-2, 40))

    def test_clocks_with_negative_hour_that_wraps(self):
        self.assertEqual(Clock(17, 3), Clock(-31, 3))

    def test_clocks_with_negative_hour_that_wraps_multiple_times(self):
        self.assertEqual(Clock(13, 49), Clock(-83, 49))

    def test_clocks_with_minute_overflow(self):
        self.assertEqual(Clock(0, 1), Clock(0, 1441))

    def test_clocks_with_minute_overflow_by_several_days(self):
        self.assertEqual(Clock(2, 2), Clock(2, 4322))

    def test_clocks_with_negative_minute(self):
        self.assertEqual(Clock(2, 40), Clock(3, -20))

    def test_clocks_with_negative_minute_that_wraps(self):
        self.assertEqual(Clock(4, 10), Clock(5, -1490))

    def test_clocks_with_negative_minute_that_wraps_multiple_times(self):
        self.assertEqual(Clock(6, 15), Clock(6, -4305))

    def test_clocks_with_negative_hours_and_minutes(self):
        self.assertEqual(Clock(7, 32), Clock(-12, -268))

    def test_clocks_with_negative_hours_and_minutes_that_wrap(self):
        self.assertEqual(Clock(18, 7), Clock(-54, -11513))


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