我認為在內部使用assertTrue進行比較不是一個好主意-

這樣，您將丟失失敗消息中的任何信息：AssertionError: False is not true

這一點都沒有幫助，你基本上回到了“原始的”assert并且你失去了很多unittest方法的好處。

我建議：

創建自己的自定義斷言

您可以在其中打印更有意義的消息。例如：import unittest

class BetweenAssertMixin(object):

def assertBetween(self, x, lo, hi):

if not (lo <= x <= hi):

raise AssertionError('%r not between %r and %r' % (x, lo, hi))

class Test1(unittest.TestCase, BetweenAssertMixin):

def test_between(self):

self.assertBetween(999, 998, 1000)

def test_too_low(self):

self.assertBetween(997, 998, 1000)

def test_too_high(self):

self.assertBetween(1001, 998, 1000)

if __name__ == '__main__':

unittest.main()

然后您將得到以下輸出（縮寫）：======================================================================

FAIL: test_too_high (__main__.Test1)

----------------------------------------------------------------------

Traceback (most recent call last):

File "example.py", line 19, in test_too_high

self.assertBetween(1001, 998, 1000)

File "example.py", line 8, in assertBetween

raise AssertionError('%r is not between %r and %r' % (x, lo, hi))

AssertionError: 1001 is not between 998 and 1000

======================================================================

FAIL: test_too_low (__main__.Test1)

----------------------------------------------------------------------

Traceback (most recent call last):

File "example.py", line 16, in test_too_low

self.assertBetween(997, 998, 1000)

File "example.py", line 8, in assertBetween

raise AssertionError('%r is not between %r and %r' % (x, lo, hi))

AssertionError: 997 is not between 998 and 1000

----------------------------------------------------------------------

或者使用assertLessEqual和assertGreaterEqual

如果不需要自定義斷言（它確實添加了另一條回溯記錄和幾行代碼）：...

def test_no_custom_assert(self):

my_integer = 100

self.assertGreaterEqual(my_integer, 998)

self.assertLessEqual(my_integer, 1000)

...

比assertTrue(998 <= my_integer <= 1000)長一點（如果只使用一次的話，總長度可能比添加自定義斷言短），但是仍然會收到很好的失敗消息（也沒有附加的回溯記錄）：======================================================================

FAIL: test_no_custom_assert (__main__.Test1)

----------------------------------------------------------------------

Traceback (most recent call last):

File "example.py", line 23, in test_no_custom_assert

self.assertGreaterEqual(my_integer, 998)

AssertionError: 100 not greater than or equal to 998

總結

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