[openstack-dev] [nova] Do we have some guidelines for mock, stub, mox when writing unit test?

John Garbutt john at johngarbutt.com
Thu Jan 2 14:58:55 UTC 2014


On 21 December 2013 13:24, Matt Riedemann <mriedem at linux.vnet.ibm.com> wrote:
>
>
> On 12/19/2013 8:51 AM, John Garbutt wrote:
>>
>> On 4 December 2013 17:10, Russell Bryant <rbryant at redhat.com> wrote:
>>>
>>> I think option 3 makes the most sense here (pending anyone saying we
>>> should run away screaming from mox3 for some reason).  It's actually
>>> what I had been assuming since this thread a while back.
>>>
>>> This means that we don't need to *require* that tests get converted if
>>> you're changing one.  It just gets you bonus imaginary internet points.
>>>
>>> Requiring mock for new tests seems fine.  We can grant exceptions in
>>> specific cases if necessary.  In general, we should be using mock for
>>> new tests.
>>
>>
>> I have lost track a bit here.
>>
>> The above seems like a sane approach. Do we all agree on that now?
>>
>> Can we add the above text into here:
>> https://wiki.openstack.org/wiki/ReviewChecklist#Nova_Review_Checklist
>>
>> John
>>
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>> OpenStack-dev at lists.openstack.org
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>>
>
> Yeah, at some point I wanted to cleanup the various testing guides but until
> then I like the idea of just putting something simple into the nova review
> checklist. Basically use mock for new tests, mox can be used in exceptional
> cases. What I've considered exceptional so far includes changes that will be
> backported to a stable release where mock isn't being used and cases where
> you basically have to bend over backwards to work new mock tests into an
> existing test class that has lots of existing setUp with mox. However, even
> in the latter case you can usually use mock after resetting the mox setup
> via self.mox.ResetAll() in the new test case(s).

The wiki looks good to me, thank you!

John



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