我尝试过搜索，但我不认为我确定如何提问。
我在学期之间和我正在尝试编程练习，所以要保持一切。我发现这个网站名为exercism.io。对于python，他们基本上会给你一个测试脚本并告诉你解决问题。我遇到了一些问题。
给定问题的测试脚本：
import unittest
from clock import Clock
class ClockTest(unittest.TestCase):
# Test creating a new clock with an initial time.
def test_on_the_hour(self):
self.assertEqual('08:00', str(Clock(8, 0)))
def test_past_the_hour(self):
self.assertEqual('11:09', str(Clock(11, 9)))
def test_midnight_is_zero_hours(self):
self.assertEqual('00:00', str(Clock(24, 0)))
def test_hour_rolls_over(self):
self.assertEqual('01:00', str(Clock(25, 0)))
def test_hour_rolls_over_continuously(self):
self.assertEqual('04:00', str(Clock(100, 0)))
def test_sixty_minutes_is_next_hour(self):
self.assertEqual('02:00', str(Clock(1, 60)))
def test_minutes_roll_over(self):
self.assertEqual('02:40', str(Clock(0, 160)))
def test_minutes_roll_over_continuously(self):
self.assertEqual('04:43', str(Clock(0, 1723)))
def test_hour_and_minutes_roll_over(self):
self.assertEqual('03:40', str(Clock(25, 160)))
def test_hour_and_minutes_roll_over_continuously(self):
self.assertEqual('11:01', str(Clock(201, 3001)))
def test_hour_and_minutes_roll_over_to_exactly_midnight(self):
self.assertEqual('00:00', str(Clock(72, 8640)))
def test_negative_hour(self):
self.assertEqual('23:15', str(Clock(-1, 15)))
def test_negative_hour_rolls_over(self):
self.assertEqual('23:00', str(Clock(-25, 0)))
def test_negative_hour_rolls_over_continuously(self):
self.assertEqual('05:00', str(Clock(-91, 0)))
def test_negative_minutes(self):
self.assertEqual('00:20', str(Clock(1, -40)))
def test_negative_minutes_roll_over(self):
self.assertEqual('22:20', str(Clock(1, -160)))
def test_negative_minutes_roll_over_continuously(self):
self.assertEqual('16:40', str(Clock(1, -4820)))
def test_negative_hour_and_minutes_both_roll_over(self):
self.assertEqual('20:20', str(Clock(-25, -160)))
def test_negative_hour_and_minutes_both_roll_over_continuously(self):
self.assertEqual('22:10', str(Clock(-121, -5810)))
# Test adding and subtracting minutes.
def test_add_minutes(self):
self.assertEqual('10:03', str(Clock(10, 0).add(3)))
def test_add_no_minutes(self):
self.assertEqual('06:41', str(Clock(6, 41).add(0)))
def test_add_to_next_hour(self):
self.assertEqual('01:25', str(Clock(0, 45).add(40)))
def test_add_more_than_one_hour(self):
self.assertEqual('11:01', str(Clock(10, 0).add(61)))
def test_add_more_than_two_hours_with_carry(self):
self.assertEqual('03:25', str(Clock(0, 45).add(160)))
def test_add_across_midnight(self):
self.assertEqual('00:01', str(Clock(23, 59).add(2)))
def test_add_more_than_one_day(self):
self.assertEqual('06:32', str(Clock(5, 32).add(1500)))
def test_add_more_than_two_days(self):
self.assertEqual('11:21', str(Clock(1, 1).add(3500)))
def test_subtract_minutes(self):
self.assertEqual('10:00', str(Clock(10, 3).add(-3)))
def test_subtract_to_previous_hour(self):
self.assertEqual('10:00', str(Clock(10, 3).add(-3)))
def test_subtract_more_than_an_hour(self):
self.assertEqual('09:33', str(Clock(10, 3).add(-30)))
def test_subtract_across_midnight(self):
self.assertEqual('08:53', str(Clock(10, 3).add(-70)))
def test_subtract_more_than_two_hours(self):
self.assertEqual('21:20', str(Clock(0, 0).add(-160)))
def test_subtract_more_than_two_hours_with_borrow(self):
self.assertEqual('03:35', str(Clock(6, 15).add(-160)))
def test_subtract_more_than_one_day(self):
self.assertEqual('04:32', str(Clock(5, 32).add(-1500)))
def test_subtract_more_than_two_days(self):
self.assertEqual('00:20', str(Clock(2, 20).add(-3000)))
# 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.assertNotEqual(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_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()
这是我的解决方案：
class Clock:
def __init__(self, h, m):
self._hour = h
self._min = m
while self._min >= 60:
self._min -= 60
self._hour += 1
if self._hour > 23:
self._hour = self._hour % 24
while self._min < 0:
self._min += 60
self._hour -= 1
if self._hour < 0:
self._hour = self._hour % 24
def __str__(self):
if self._hour < 10:
hour_str = '0' + str(self._hour)
else:
hour_str = str(self._hour)
if self._min < 10:
min_str = '0' + str(self._min)
else:
min_str = str(self._min)
return hour_str + ":" + min_str
def __eq__(self, other):
if self._hour != other._hour: return False
if self._min != other._min: return False
return True
def add(self, m):
tot_min = (self._hour * 60) + self._min
tot_min += m
self._hour = (tot_min // 60) % 24
self._min = tot_min % 60
def getHour(self):
return self._hour
def getMinute(self):
return self._min
以下是我不断收到的错误示例：
======================================================================
FAIL: test_subtract_to_previous_hour (__main__.ClockTest)
----------------------------------------------------------------------
Traceback (most recent call last):
File "/Users/aaron/exercism/python/clock/clock_test.py", line 94, in test_subtract_to_previous_hour
self.assertEqual('10:00', str(Clock(10, 3).add(-3)))
AssertionError: '10:00' != 'None'
- 10:00
+ None
我不知道为什么会一直回来“没有”＃39;我能说的最好的是，当它测试我的问题时，它会在创建类似这样的对象时调用类的方法：
Clock(0, 45).add(40)
如果我要在我的脚本中测试它，请执行以下操作：
cl = Clock(0, 45)
cl.add(40)
它可以正常运作。
我错过了什么吗？
感谢。