<p>pytest的工作是捕获输出并将其呈现给操作员。因此,与其让pytest按照您想要的方式进行日志记录,不如将日志记录构建到您的测试中。</p>
<p>Python的<code>assert</code>命令只接受一个真值和一条消息。因此,不要在测试中使用一个空的<code>assert</code>,您可以编写一个小函数,在值为false(这是触发断言失败的相同条件)时执行日志记录,然后调用断言,以便获得所需的日志记录,以及创建控制台输出的断言驱动行为。</p>
<p>下面是一个使用这样一个函数的小测试文件:</p>
<pre><code># test_foo.py
import logging
def logAssert(test,msg):
if not test:
logging.error(msg)
assert test,msg
def test_foo():
logging.info("testing foo")
logAssert( 'foo' == 'foo', "foo is not foo")
def test_foobar():
logging.info("testing foobar")
logAssert( 'foobar' == 'foo', "foobar is not foo")
</code></pre>
<p>这是测试运行程序,与您的非常相似:</p>
<pre><code># runtests.py
import logging
import pytest
logging.basicConfig(filename='config_check.log', level=logging.INFO)
logging.info('start')
pytest.main()
logging.info('done')
</code></pre>
<p>输出如下:</p>
<pre><code># python runtests.py
==== test session starts ========================
platform linux2 -- Python 2.6.6 -- py-1.4.22 -- pytest-2.6.0
collected 2 items
test_foo.py .F
========== FAILURES ============================
________ test_foobar __________________________
def test_foobar():
logging.info("testing foobar")
> logAssert( 'foobar' == 'foo', "foobar is not foo")
test_foo.py:14:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
test = False, msg = 'foobar is not foo'
def logAssert(test,msg):
if not test:
logging.error(msg)
> assert test,msg
E AssertionError: foobar is not foo
test_foo.py:6: AssertionError ==== 1 failed, 1 passed in 0.02 seconds =======
</code></pre>
<p>下面是日志:</p>
<pre><code># cat config_check.log
INFO:root:start
INFO:root:testing foo
INFO:root:testing foobar
ERROR:root:foobar is not foo
INFO:root:done
</code></pre>