[Twisted-Python] Running Trial [wav]: Re: Possible bug

Chris Norman chris.norman2 at googlemail.com
Sat Oct 31 02:31:28 MDT 2015 

Hi,
So I went on the net on the off chance that the info I was looking for 
was easy to obtain, and I found out about trial.

I cloned the git and did:
python bin/trial twisted

I got the following:

Unhandled Error
Traceback (most recent call last):
   File "C:\Users\chris\Dropbox\SRC\twisted\twisted\scripts\trial.py", 
line 473, in postOptions
     _BasicOptions.postOptions(self)
   File "C:\Users\chris\Dropbox\SRC\twisted\twisted\scripts\trial.py", 
line 383, in postOptions
     self['reporter'] = self._loadReporterByName(self['reporter'])
   File "C:\Users\chris\Dropbox\SRC\twisted\twisted\scripts\trial.py", 
line 370, in _loadReporterByName
     for p in plugin.getPlugins(itrial.IReporter):
   File "C:\Users\chris\Dropbox\SRC\twisted\twisted\plugin.py", line 
213, in getPlugins
     allDropins = getCache(package)
--- <exception caught here> ---
   File "C:\Users\chris\Dropbox\SRC\twisted\twisted\plugin.py", line 
171, in getCache
     provider = pluginModule.load()
   File "C:\Users\chris\Dropbox\SRC\twisted\twisted\python\modules.py", 
line 389, in load
     return self.pathEntry.pythonPath.moduleLoader(self.name)
   File "C:\Users\chris\Dropbox\SRC\twisted\twisted\python\reflect.py", 
line 303, in namedAny
     topLevelPackage = _importAndCheckStack(trialname)
   File "C:\Users\chris\Dropbox\SRC\twisted\twisted\python\reflect.py", 
line 242, in _importAndCheckStack
     return __import__(importName)
   File 
"C:\Users\chris\Dropbox\SRC\twisted\twisted\plugins\twisted_core.py", 
line 5, in <module>
     from twisted.internet.endpoints import _SystemdParser, 
_TCP6ServerParser, _StandardIOParser
   File 
"C:\Users\chris\Dropbox\SRC\twisted\twisted\internet\endpoints.py", line 
34, in <module>
     from twisted.internet.stdio import StandardIO, PipeAddress
   File "C:\Users\chris\Dropbox\SRC\twisted\twisted\internet\stdio.py", 
line 30, in <module>
     from twisted.internet import _win32stdio
   File 
"C:\Users\chris\Dropbox\SRC\twisted\twisted\internet\_win32stdio.py", 
line 15, in <module>
     from twisted.internet import _pollingfile, main
   File 
"C:\Users\chris\Dropbox\SRC\twisted\twisted\internet\_pollingfile.py", 
line 106, in <module>
     class _PollableReadPipe(_PollableResource):
   File 
"C:\Users\chris\Dropbox\SRC\twisted\twisted\internet\_pollingfile.py", 
line 108, in _PollableReadPipe
     implements(IPushProducer)
   File "C:\python35\lib\site-packages\zope\interface\declarations.py", 
line 412, in implements
     raise TypeError(_ADVICE_ERROR % 'implementer')
builtins.TypeError: Class advice impossible in Python3.  Use the 
@implementer class decorator instead.

Unexpected error while writing cache file
Traceback (most recent call last):
   File "C:\Users\chris\Dropbox\SRC\twisted\twisted\scripts\trial.py", 
line 473, in postOptions
     _BasicOptions.postOptions(self)
   File "C:\Users\chris\Dropbox\SRC\twisted\twisted\scripts\trial.py", 
line 383, in postOptions
     self['reporter'] = self._loadReporterByName(self['reporter'])
   File "C:\Users\chris\Dropbox\SRC\twisted\twisted\scripts\trial.py", 
line 370, in _loadReporterByName
     for p in plugin.getPlugins(itrial.IReporter):
   File "C:\Users\chris\Dropbox\SRC\twisted\twisted\plugin.py", line 
213, in getPlugins
     allDropins = getCache(package)
--- <exception caught here> ---
   File "C:\Users\chris\Dropbox\SRC\twisted\twisted\plugin.py", line 
185, in getCache
     dropinPath.setContent(pickle.dumps(dropinDotCache))
   File "C:\Users\chris\Dropbox\SRC\twisted\twisted\python\filepath.py", 
line 1532, in setContent
     os.rename(sib.path, self.path)
builtins.ValueError: rename: src and dst must be the same type

Traceback (most recent call last):
   File "C:\Users\chris\Dropbox\SRC\twisted\twisted\python\lockfile.py", 
line 91, in symlink
     rename(newlinkname, filename)
FileExistsError: [WinError 183] Cannot create a file when that file 
already exists: 
'C:\\Users\\chris\\Dropbox\\SRC\\twisted\\_trial_temp.lock.1446280185217.newlink' 
-> 'C:\\Users\\chris\\Dropbox\\SRC\\twisted\\_trial_temp.lock'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
   File "bin/trial", line 22, in <module>
     run()
   File "C:\Users\chris\Dropbox\SRC\twisted\twisted\scripts\trial.py", 
line 616, in run
     test_result = trialRunner.run(suite)
   File "C:\Users\chris\Dropbox\SRC\twisted\twisted\trial\runner.py", 
line 959, in run
     return self._runWithoutDecoration(test, self._forceGarbageCollection)
   File "C:\Users\chris\Dropbox\SRC\twisted\twisted\trial\runner.py", 
line 983, in _runWithoutDecoration
     oldDir = self._setUpTestdir()
   File "C:\Users\chris\Dropbox\SRC\twisted\twisted\trial\runner.py", 
line 886, in _setUpTestdir
     testdir, self._testDirLock = util._unusedTestDirectory(base)
   File "C:\Users\chris\Dropbox\SRC\twisted\twisted\trial\util.py", line 
356, in _unusedTestDirectory
     if testDirLock.lock():
   File "C:\Users\chris\Dropbox\SRC\twisted\twisted\python\lockfile.py", 
line 160, in lock
     symlink(str(os.getpid()), self.name)
   File "C:\Users\chris\Dropbox\SRC\twisted\twisted\python\lockfile.py", 
line 94, in symlink
     os.rmdir(newlinkname)
OSError: [WinError 145] The directory is not empty: 
'C:\\Users\\chris\\Dropbox\\SRC\\twisted\\_trial_temp.lock.1446280185217.newlink'

Is that a trial error or a Twisted test failing?

Sorry if this is a stupid question, but (terrible, I know) I've never 
used tests before.

Another quick google told me that Trial was ported to Python3, so I'm 
not sure... If it's a test failing, it's not really telling me where the 
failure is.

Cheers.


On 31/10/2015 07:39, Glyph Lefkowitz wrote:
>
>> On Oct 30, 2015, at 11:49 PM, Chris Norman 
>> <chris.norman2 at googlemail.com <mailto:chris.norman2 at googlemail.com>> 
>> wrote:
>>
>> Hi Amber
>>
>> On 31/10/2015 06:45, Amber "Hawkie" Brown wrote:
>>> Hi Chris,
>>>
>>> Twisted does not yet support Python 3 on Windows.
>>
>> That's a shame. I've never contributed to an open source project 
>> before, but I'd be glad to try and help out. I feel I __may__ know 
>> enough Python now to certainly have a shot at it.
>
> If you feel like you might, you definitely do :-).  Often people feel 
> like they need to be advanced rocket surgeons to work on Twisted, but 
> in fact, our robust code-review process means that you don't have to 
> worry about making mistakes at all.  Just submit your best effort, and 
> you'll get a code review telling you how to improve it so that it can 
> be integrated (and you _will_ get at least one round of review: I 
> created Twisted, and even _I_ can't usually land a patch without one 
> or two rounds of review ;-)).
>
> Thanks for offering to help out!  If everybody who wanted Python 3 
> support just signed on to work on a ticket like this, the port would 
> have been finished a year ago ;-).
>>> There's a ticket athttps://twistedmatrix.com/trac/ticket/8025#ticket  which makes all the tests pass on the platform; I just need to work on it some more. I expect Twisted 16.0 to have base support for Python 3 on Windows.
>> As above, if I can help, please tell me how!
>
> Our toolchain is a little clunky (sorry about that) for hysterical 
> raisins.
>
> Before I launch into an explanation though, are you already familiar 
> with Git and/or how to contribute on GitHub?
>
> -glyph
>
>
> _______________________________________________
> Twisted-Python mailing list
> Twisted-Python at twistedmatrix.com
> http://twistedmatrix.com/cgi-bin/mailman/listinfo/twisted-python

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