使 Python unittest 显示 AssertionError 但不显示 Traceback [英] Make Python unittest show AssertionError but no Traceback

问题描述

我在这里查看了其他相关问题，但没有找到我的答案.我想简化我的 Python (2.7) 单元测试的输出.尝试 sys.tracebacklimit = 0 不起作用.

I have looked at the other related questions here but have not found my answer. I would like to simplify the output of my Python (2.7) unittests. Trying sys.tracebacklimit = 0 did not work.

这是我的代码片段(真实代码生成了很多类似的测试):

Here is my code snippet (the real code generates lots of similar tests):

#!/usr/bin/python -E
import unittest
import os
import sys

class TestSequense(unittest.TestCase):
    pass

def test_dir_exists(dir):
    def test(self):
        self.assertTrue(os.path.isdir(dir),"ERROR: " + dir + " is not a directory")
    return test

if __name__ == '__main__':
    test = test_dir_exists("/something/not/set/correctly")
    setattr(TestSequense, "test_path",  test)
    #TODO trying remove unnecessary traceback info... still not working
    sys.tracebacklimit = 0
    unittest.main()

当前输出:

F
======================================================================
FAIL: test_path (__main__.TestSequense)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "./simple_unittest.py", line 11, in test
    self.assertTrue(os.path.isdir(dir),"ERROR: " + dir + " is not a directory")
AssertionError: ERROR: /something/not/set/correctly is not a directory

----------------------------------------------------------------------
Ran 1 test in 0.000s

FAILED (failures=1)

我希望它看起来像这样:

I would like it to look like this:

F
======================================================================
FAIL: test_path (__main__.TestSequense)
----------------------------------------------------------------------
AssertionError: ERROR: /something/not/set/correctly is not a directory

----------------------------------------------------------------------
Ran 1 test in 0.000s

FAILED (failures=1)

这可能不解析输出吗?回溯没有给我任何有用的信息，我正在运行 1000 次测试.

Is this possible without parsing the output? The Traceback gives me no useful information and I am running 1000's of tests.

提前致谢！

推荐答案

我不确定是否可以使用 vanilla unittest 模块.但是你应该看看py.test，用它你可以配置显示的信息量在带有 --tb 开关的回溯中.

I'm not sure if it's possible with vanilla unittest module. But you should take a look at py.test, with it you can configure the amount of information shown in a traceback with the --tb switch.

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py.test --tb=line    # only one line per failure

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