[py-dev] Using funcargs (monkeypatch, tmpdir) during setup

[Virgil Dupras]

On 2011-01-04, at 9:40 AM, Floris Bruynooghe wrote:

> Hello Virgil
> 
> On 2 January 2011 16:25, Virgil Dupras <hsoft at hardcoded.net> wrote:
>> I'm wondering what's the common pattern of pytest users regarding the use of monkey-patching and temporary directories in setup functions. I already have my own "home-brewed" (again!) mechanism for that, but I want to "pytest-ify" the way I write tests.
>> 
>> So far, the only solution I can come up with is to have all tests use the funcarg(s) and pass them to the setup function when they're called. Example:
>> 
>> def my_setup(monkeypatch, tmpdir):
>>    moneypatch.setattr(module, 'something', foo)
>>    tmpdir.mkdir('bar')
> 
> I usually do this by creating a new funcarg for the required setup:
> 
> def pytest_funcarg__my_setup(request):
>    monkey = request.getfuncargvalue(monkeypatch)
>    monkey.setattr(module, 'something', foo)
>    tmpdir = request.getfuncargvalue(tmpdir)
>    return tmpdir.mkdir('bar')
> 
> def test1(my_setup):
>    pass
> 
> This seems a fairly neat solution to me.
> 
> Regards
> Floris
> 
> -- 
> Debian GNU/Linux -- The Power of Freedom
> www.debian.org | www.gnu.org | www.kernel.org

I didn't know about request.getfuncargvalue(). Yup, that seems like a nice way to solve my problem, thanks!

Quick note though (for other people reading): I made a quick test and the argument to getfuncargvalue() is a string, so the correct way to call it is request.getfuncargvalue('monkeypatch').

Thanks again,
Virgil