891611 - mozcrash unit tests don't appear to work on windows

Status: RESOLVED INVALID

(Testing :: Mozbase, defect)

Description

[William Lachance (:wlach)]

Or at least they don't for me, here's what I get when I run them:

wlach@WLACH-WIN7-VM ~/mozbase (master)
$ Scripts/python mozcrash/tests/test.py
Traceback (most recent call last):
  File "mozcrash/tests/test.py", line 11, in <module>
    log = mozlog.getLogger("mozcrash", os.devnull)
  File "c:\users\wlach\mozbase\mozlog\mozlog\logger.py", line 107, in getLogger
    handler = FileHandler(logfile)
  File "c:\mozilla-build\python\Lib\logging\__init__.py", line 819, in __init__
    StreamHandler.__init__(self, self._open())
  File "c:\mozilla-build\python\Lib\logging\__init__.py", line 838, in _open
    stream = open(self.baseFilename, self.mode)
IOError: [Errno 2] No such file or directory: '\\\\nul'

It appears that the culprit is the redirection of the log to os.devnull, which doesn't exist on Windows:

https://github.com/mozilla/mozbase/blob/master/mozcrash/tests/test.py#L10

Comment 1

[(not currently active) Ted Mielczarek]

I hadn't run the tests on Windows previously, but os.devnull works fine on Windows for me, and it seems to work okay with the logging module:
$ python
Python 2.7.2 (default, Jun 12 2011, 15:08:59) [MSC v.1500 32 bit (Intel)] on win
32
Type "help", "copyright", "credits" or "license" for more information.
>>> import os
>>> os.devnull
'nul'
>>> open(os.devnull, "w")
<open file 'nul', mode 'w' at 0x0054B968>
>>> import logging
>>> fh = logging.FileHandler(os.devnull)
>>> fh
<logging.FileHandler object at 0x02013550>
>>> log = logging.getLogger("foo")
>>> log.addHandler(fh)
>>> log.info("hello")
>>>

I just ran the tests on Windows and they seem fine here:
$ ../ve-mozbase/Scripts/python.exe mozcrash/tests/test.py
........
----------------------------------------------------------------------
Ran 8 tests in 0.544s

OK

Comment 2

[William Lachance (:wlach)]

I was using an older version of mozilla-build with python 2.6. Updating to the latest version with python 2.7 fixes everything.