openstack team mailing list archive

[Jay Pipes <jaypipes@xxxxxxxxx>]

On Tue, Nov 22, 2011 at 12:50 PM, Kevin L. Mitchell
<kevin.mitchell@xxxxxxxxxxxxx> wrote:
> On Tue, 2011-11-22 at 12:12 -0500, Jay Pipes wrote:
>> FWIW, I created a fake database store for Glance originally, and
>> indeed the unit tests ran quicker than they do now because we use an
>> in-memory SQLite database in the unit tests. That said, switching from
>> a faked datastore to a real one that actually used the SQLAlchemy code
>> exposed at least 4 bugs that weren't being caught by the fake data
>> store.
>
> I don't think anyone disagrees that testing with actual database code is
> essential.  However, it seems to me that testing actual database code at
> the integration level, rather than at the unit level, would catch these
> kinds of bugs while still keeping the unit tests fast, which is part of
> the allure of this approach for me.

Sure, I don't disagree with you, just pointing out that there be
dangers in faking everything all the time ;)

-jay