[TIP] Testing optparse with Nosetests

[Dan Wandschneider]

Tim-
optparse.parse_args() parses all arguments given on the command line, so it
is probably balking on the commands that you gave to Nose.  In tests, you
should create the specific argument list that you want to test, and then
run parser.parse_args(arglist).  For example:
    argslist = ['-h']
    with assertRaises(SystemExit):
        myparser.parse_args(argslist)

If your parser is wrapped in a function or method, use this:
    def my_parsing_function(args=None):
        myparser.parse_args(args)

If args == None, OptParse will use sys.argv, so your production code is
safe.  (Also, if you are writing new code, I believe that ArgParse is
preferred to OptParse)

-Dan W.
http://www.schrodinger.com/

On Tue, Oct 30, 2012 at 12:00 PM, <testing-in-python-request at lists.idyll.org
> wrote:

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>    1. Testing optparse with Nosetests (Tim Aerdts)
>    2. Re: Testing optparse with Nosetests (Tim Aerdts)
>
>
> ---------- Forwarded message ----------
> From: Tim Aerdts <fragger123 at gmail.com>
> To: testing-in-python at lists.idyll.org
> Cc:
> Date: Tue, 30 Oct 2012 09:42:49 +0100
> Subject: [TIP] Testing optparse with Nosetests
> Hello,
>
> Posting this here because it seems more active then the Nosetests users
> list.
> Anyway I am in the process of writing an application which makes use of
> Optparse. I'm running the tests with Nosetests but I fear these two might
> be interfering?
>
> When I run parser.parse_args() anywhere in my code Nosetests bugs out.
>
> Usage: nosetests [options]
> nosetests: error: no such option: --with-coverage
>
> Removing the call to parse_args() and everything runs fine.
>
> Cheers,
>
> --
> Kind regards,
> Tim Aerdts
> http://www.tuimz.nl
>
>
> ---------- Forwarded message ----------
> From: Tim Aerdts <fragger123 at gmail.com>
> To: testing-in-python at lists.idyll.org
> Cc:
> Date: Tue, 30 Oct 2012 11:00:53 +0100
> Subject: Re: [TIP] Testing optparse with Nosetests
> Just a follow-up.
>
> If I add the options that I use with nosetests (--with-coverage --verbose
> --cover-package=mypackage) to my own optparser it works as expected.
>
> I don't understand this, and preferably I don't need those dependencies in
> my main application..
>
> On Tue, Oct 30, 2012 at 9:42 AM, Tim Aerdts <fragger123 at gmail.com> wrote:
>
>> Hello,
>>
>> Posting this here because it seems more active then the Nosetests users
>> list.
>> Anyway I am in the process of writing an application which makes use of
>> Optparse. I'm running the tests with Nosetests but I fear these two might
>> be interfering?
>>
>> When I run parser.parse_args() anywhere in my code Nosetests bugs out.
>>
>> Usage: nosetests [options]
>> nosetests: error: no such option: --with-coverage
>>
>> Removing the call to parse_args() and everything runs fine.
>>
>> Cheers,
>>
>> --
>> Kind regards,
>> Tim Aerdts
>> http://www.tuimz.nl
>>
>
>
>
> --
> Kind regards,
> Tim Aerdts
> http://www.tuimz.nl
>
> _______________________________________________
> testing-in-python mailing list
> testing-in-python at lists.idyll.org
> http://lists.idyll.org/listinfo/testing-in-python
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>
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