On Tue, Feb 25, 2014 at 07:46:23PM -0600, Matt Riedemann wrote:
> 
> 
> On 2/12/2014 1:57 PM, Matthew Treinish wrote:
> >On Wed, Feb 12, 2014 at 11:32:39AM -0700, Matt Riedemann wrote:
> >>
> >>
> >>On 1/17/2014 8:34 AM, Matthew Treinish wrote:
> >>>On Fri, Jan 17, 2014 at 08:32:19AM -0500, David Kranz wrote:
> >>>>On 01/16/2014 10:56 PM, Matthew Treinish wrote:
> >>>>>Hi everyone,
> >>>>>
> >>>>>With some recent changes made to Tempest compatibility with nosetests is 
> >>>>>going
> >>>>>away. We've started using newer features that nose just doesn't support. 
> >>>>>One
> >>>>>example of this is that we've started using testscenarios and we're 
> >>>>>planning to
> >>>>>do this in more places moving forward.
> >>>>>
> >>>>>So at Icehouse-3 I'm planning to push the patch out to remove nosetests 
> >>>>>from the
> >>>>>requirements list and all the workarounds and references to nose will be 
> >>>>>pulled
> >>>>>out of the tree. Tempest will also start raising an unsupported 
> >>>>>exception when
> >>>>>you try to run it with nose so that there isn't any confusion on this 
> >>>>>moving
> >>>>>forward. We talked about doing this at summit briefly and I've brought 
> >>>>>it up a
> >>>>>couple of times before, but I believe it is time to do this now. I feel 
> >>>>>for
> >>>>>tempest to move forward we need to do this now so that there isn't any 
> >>>>>ambiguity
> >>>>>as we add even more features and new types of testing.
> >>>>I'm with you up to here.
> >>>>>
> >>>>>Now, this will have implications for people running tempest with python 
> >>>>>2.6
> >>>>>since up until now we've set nosetests. There is a workaround for getting
> >>>>>tempest to run with python 2.6 and testr see:
> >>>>>
> >>>>>https://review.openstack.org/#/c/59007/1/README.rst
> >>>>>
> >>>>>but essentially this means that when nose is marked as unsupported on 
> >>>>>tempest
> >>>>>python 2.6 will also be unsupported by Tempest. (which honestly it 
> >>>>>basically has
> >>>>>been for while now just we've gone without making it official)
> >>>>The way we handle different runners/os can be categorized as "tested
> >>>>in gate", "unsupported" (should work, possibly some hacks needed),
> >>>>and "hostile". At present, both nose and py2.6 I would say are in
> >>>>the unsupported category. The title of this message and the content
> >>>>up to here says we are moving nose to the hostile category. With
> >>>>only 2 months to feature freeze I see no justification in moving
> >>>>py2.6 to the hostile category. I don't see what new testing features
> >>>>scheduled for the next two months will be enabled by saying that
> >>>>tempest cannot and will not run on 2.6. It has been agreed I think
> >>>>by all projects that py2.6 will be dropped in J. It is OK that py2.6
> >>>>will require some hacks to work and if in the next few months it
> >>>>needs a few more then that is ok. If I am missing another connection
> >>>>between the py2.6 and nose issues, please explain.
> >>>>
> >>>
> >>>So honestly we're already at this point in tempest. Nose really just 
> >>>doesn't
> >>>work with tempest, and we're adding more features to tempest, your 
> >>>negative test
> >>>generator being one of them, that interfere further with nose. I've seen 
> >>>several
> >>
> >>I disagree here, my team is running Tempest API, CLI and scenario
> >>tests every day with nose on RHEL 6 with minimal issues.  I had to
> >>workaround the negative test discovery by simply sed'ing that out of
> >>the tests before running it, but that's acceptable to me until we
> >>can start testing on RHEL 7.  Otherwise I'm completely OK with
> >>saying py26 isn't really supported and isn't used in the gate, and
> >>it's a buyer beware situation to make it work, which includes
> >>pushing up trivial patches to make it work (which I did a few of
> >>last week, and they were small syntax changes or usages of
> >>testtools).
> >>
> >>I don't understand how the core projects can be running unit tests
> >>in the gate on py26 but our functional integration project is going
> >>to actively go out and make it harder to run Tempest with py26, that
> >>sucks.
> >>
> >>If we really want to move the test project away from py26, let's
> >>make the concerted effort to get the core projects to move with it.
> >
> >So as I said before the python 2.6 story for tempest remains the same after 
> >this
> >change. The only thing that we'll be doing is actively preventing nose from
> >working with tempest.
> >
> >>
> >>And FWIW, I tried the discover.py patch with unittest2 and
> >>testscenarios last week and either I botched it, it's not documented
> >>properly on how to apply it, or I screwed something up, but it
> >>didn't work for me, so I'm not convinced that's the workaround.
> >>
> >>What's the other option for running Tempest on py26 (keeping RHEL 6
> >>in mind)?  Using tox with testr and pip?  I'm doing this all
> >>single-node.
> >
> >Yes, that is what the discover patch is used to enable. By disabling nose the
> >only path to run tempest with py2.6 is to use testr. (which is what it always
> >should have been)
> >
> >Attila confirmed it was working here:
> >http://fpaste.org/76651/32143139/
> >in that example he applies 2 patches the second one is currently in the gate 
> >for
> >tempest. (https://review.openstack.org/#/c/72388/ ) So all that needs to be 
> >done
> >is to apply that discover patch:
> >
> >https://code.google.com/p/unittest-ext/issues/detail?id=79
> >
> >(which I linked to before)
> >
> >Then tempest should run more or less the same between 2.7 and 2.6. (The only
> >difference I've seen is in how skips are handled)
> >
> >>
> >>>patches this cycle that attempted to introduce incorrect behavior while 
> >>>trying
> >>>to fix compatibility with nose. That's why I think we need a clear message 
> >>>on
> >>>this sooner than later. Which is why I'm proposing actively raising an 
> >>>error
> >>>when things are run with nose upfront so there isn't any illusion that 
> >>>things
> >>>are expected to work.
> >>>
> >>>This doesn't necessarily mean we're moving python 2.6 to the hostile 
> >>>category.
> >>>Nose support is independent of python 2.6 support. Py26 I would still 
> >>>consider
> >>>to be unsupported, the issue is that the hack to make py26 work is outside 
> >>>of
> >>>tempest. This is why we've recommended that people using python 2.6 run 
> >>>with
> >>>nose, which really is no longer an option. Attila's abandoned patch that I
> >>>linked above documents points to this bug with a patch to discover which is
> >>>need to get python 2.6 working with tempest and testr:
> >>>
> >>>https://code.google.com/p/unittest-ext/issues/detail?id=79
> >
> >_______________________________________________
> >OpenStack-dev mailing list
> >OpenStack-dev@lists.openstack.org
> >http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
> >
> 
> One question I had was is there an easy way to setup a config file
> to specify the test bucket and what can be excluded, like you can
> with nose.cfg and nose?  We used that for filtering out API tests
> that didn't work with the PowerVM driver in Nova but I'm not aware
> of something similar with testr.

So I'm not sure if it's exactly what you're looking for but testr has the
--load-list option which you can use to specify a file which lists the tests
you want to run. I don't think there is a method to exclude tests besides using
a regex filter right now. There is a bug open about this:

https://bugs.launchpad.net/testrepository/+bug/1208610

So I can see you doing this 2 ways either writing a little script that will
generate a list file by doing something like:

1. testr list-tests > file
2. remove excludes from file
3. testr run --load-list file

or making a long unwieldy regex that excludes the tests you need to. Something
like what I did here:

https://review.openstack.org/#/c/51275/4/tox.ini

-Matt Treinish

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