On 08/26/2014 10:14 AM, Zane Bitter wrote:
Steve Baker has started the process of moving Heat tests out of the
Tempest repository and into the Heat repository, and we're looking for
some guidance on how they should be packaged in a consistent way.
Apparently there are a few projects already packaging functional tests
in the package <projectname>.tests.functional (alongside
<projectname>.tests.unit for the unit tests).
That strikes me as odd in our context, because while the unit tests run
against the code in the package in which they are embedded, the
functional tests run against some entirely different code - whatever
OpenStack cloud you give it the auth URL and credentials for. So these
tests run from the outside, just like their ancestors in Tempest do.
There's all kinds of potential confusion here for users and packagers.
None of it is fatal and all of it can be worked around, but if we
refrain from doing the thing that makes zero conceptual sense then there
will be no problem to work around :)
I suspect from reading the previous thread about "In-tree functional
test vision" that we may actually be dealing with three categories of
test here rather than two:
* Unit tests that run against the package they are embedded in
* Functional tests that run against the package they are embedded in
* Integration tests that run against a specified cloud
i.e. the tests we are now trying to add to Heat might be qualitatively
different from the <projectname>.tests.functional suites that already
exist in a few projects. Perhaps someone from Neutron and/or Swift can
confirm?
I'd like to propose that tests of the third type get their own top-level
package with a name of the form <projectname>-integrationtests (second
choice: <projectname>-tempest on the principle that they're essentially
plugins for Tempest). How would people feel about standardising that
across OpenStack?
By its nature, Heat is one of the only projects that would have
integration tests of this nature. For Nova, there are some "functional"
tests in nova/tests/integrated/ (yeah, badly named, I know) that are
tests of the REST API endpoints and running service daemons (the things
that are RPC endpoints), with a bunch of stuff faked out (like RPC
comms, image services, authentication and the hypervisor layer itself).
So, the "integrated" tests in Nova are really not testing integration
with other projects, but rather integration of the subsystems and
processes inside Nova.
I'd support a policy that true integration tests -- tests that test the
interaction between multiple real OpenStack service endpoints -- be left
entirely to Tempest. Functional tests that test interaction between
internal daemons and processes to a project should go into
/$project/tests/functional/.
For Heat, I believe tests that rely on faked-out other OpenStack
services but stress the interaction between internal Heat
daemons/processes should be in /heat/tests/functional/ and any tests the
rely on working, real OpenStack service endpoints should be in Tempest.
Best,
-jay
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