Re: [Fab-user] Testing fabfiles

[Chris McDonald]

On Fri, Oct 21, 2011 at 11:18 AM, Jeff Forcier <address@hidden> wrote:
>> On Fri, Oct 21, 2011 at 11:17 AM, Ahsan Rabbani <address@hidden> wrote:
>>
>> So for example, if I call a
>> task that is decorated with @hosts (and has multiple hosts defined) it would
>> be nice if it got invoked once for each host defined.
>
> After 1.3 is released (any day now) you'll be able to use the
> execute() function for this purpose, so replacing your task object
> with a Mock, decorating it with @hosts, and throwing it into
> execute(), should behave the way you need it to.
>
>
>> Afterwards, ironfroggy said:
>>
>> I admit, I don't test them. Not with unit tests, and I'm guessing most
>> people don't. The fabfile.py seems outside of "real code" and escapes
>> the expectation of testing, sadly. I think this should be corrected.
>> One thing I"m trying to do more is create temporary test servers with
>> vagrant to do local operations on and test this stuff out better.
>
> Fabric actually ships with a somewhat crude fake SSH server leveraging
> Paramiko's server-side code, and we use it widely in our own test
> suite. There are vague plans to try and clean this up and release it
> as its own library, but for now, you may still find it useful to check
> out.
>
> At the moment it can only do simple input/response, e.g.
> @server({'this command should': ('return this stdout', 'this stderr,
> and return code', 3)}) -- there's no state or any attempt at
> implementing "real" unix commands. But this would probably get many
> folks 80% of the way there re: testing fabfiles.
>
> For complex fabfiles, using something like Vagrant is always a good
> option, if slightly more time-consuming (i.e. it's not a great fit for
> CI or rapid test iteration.)
>
> Best,
> Jeff
>
> --
> Jeff Forcier
> Unix sysadmin; Python/Ruby engineer
> http://bitprophet.org
>
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>

I haven't done Vagrant testing with my work production fabric stuff
but I have used it to test personal fabric scripts cross platform. It
works really well for that but isn't ideal for unit testing.

-Wraithan