Nosetests AssertionError 输出格式

Question

嗨，我想知道是否有办法修复鼻子测试断言失败的输出。我有一个名为“t.py”的简单脚本：

import unittest
from nose.tools import assert_equal

class x(unittest.TestCase):
    """
    Testing
    """
    def test(self):
        assert_equal(1, 2)

如果我使用命令“nosetests t”运行它，那么我会得到以下结果。

AssertionError: 1 != 2
    '1 != 2' = '%s != %s' % (safe_repr(1), safe_repr(2))
    '1 != 2' = self._formatMessage('1 != 2', '1 != 2')
>>  raise self.failureException('1 != 2')

而不是运行“python -m unittest t”时得到的输出

AssertionError: 1 != 2

有谁知道我如何使鼻子测试输出与单元测试输出匹配？当运行许多测试时，这会使结果混乱。

这是使用 python 2.7.3，nose==1.3.0，在 ubuntu VM 内的 virtualenv 中。

编辑：

我对 Nose 尝试提供更多信息没有意见。我有一个不断增长的测试套件，额外的信息可能会有所帮助。只是它提供了相当无用的信息。我真的不需要多次查看相同的信息。如果有多个测试，或者特别是如果有如下附加消息，则很难发现问题：

assert_equal(1,2, "Something is messed up before this assertion. Now here is a bunch of info to help with debugging. This is really quite a lot of info you know. Yes it is very long isn't it?")

然后我明白了：

assert_equal(1,2, "Something is messed up before this assertion. Now here is a bunch of info to help with debugging. This is really quite a lot of info you know. Yes it is very long isnt it?")
AssertionError: Something is messed up before this assertion. Now here is a bunch of info to help with debugging. This is really quite a lot of info you know. Yes it is very long isn't it?
    '1 != 2' = '%s != %s' % (safe_repr(1), safe_repr(2))
    "Something is messed up before this assertion. Now here is a bunch of info to help with debugging. This is really quite a lot of info you know. Yes it is very long isnt it?" = self._formatMessage("Something is messed up before this assertion. Now here is a bunch of info to help with debugging. This is really quite a lot of info you know. Yes it is very long isnt it?", '1 != 2')
>>  raise self.failureException("Something is messed up before this assertion. Now here is a bunch of info to help with debugging. This is really quite a lot of info you know. Yes it is very long isnt it?")

谢谢！

Answer 1

您是否尝试过 self.assertEqual where self is "unittest.TestCase"？

为此

import unittest
class x(unittest.TestCase):
  def test_1(self):
      self.assertEqual(1,2)

我得到这个输出

laptop:~/workspace/test$ nosetests j.py
F
======================================================================
FAIL: test_1 (j.x)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/workspace/test/j.py", line 4, in test_1
    self.assertEqual(1,2)
AssertionError: 1 != 2

----------------------------------------------------------------------
Ran 1 test in 0.001s

FAILED (failures=1)

编辑： 您可能还喜欢 "nosetests -q, --quiet" 以减少冗长

Answer 2

nosetests 试图比默认的 python assert 更有帮助。面对默认断言错误消息时，您通常需要更多信息来追踪错误。在您必须找出几十个真正的断言错误之前，您可能不会完全理解这一点。

您不必担心结果会混乱，因为您选择一个并修复它（更快，因为您有更多信息），通常情况是没有很多（或更好的零）