At 11:55 AM 6/7/2005 -0700, Heikki Toivonen wrote:
> By the way, if you are doing assertions in code that is called by the
> reactor, this may be a bit of a problem; the reactor expects to log all
> such errors, and doesn't pass them on anywhere. So, you would
> definitely need for all your assertions to be in your test method itself
> (i.e. *after* the waitFor/waitUntil)
Uh oh. Well that could be a problem. Unit tests typically want to do
lots of asserts all over the place.
Well, you could just do:
result = defer.Deferred()
def whatever(...): # code that's called by reactor
try:
#
#
#
# lots of test code here that includes asserts
#
#
#
except:
result.errback() # save any errors for later
else:
result.callback(return_value) # send data back to caller
return_value = reactor.waitUntil(result, timeout)
# more asserts on return_value, or run more reactor-based code
When the 'waitUntil' returns, it will re-raise the assertion error sent by
errback() if there was one, otherwise it will return the value sent by
callback().
A Deferred is a conduit for communicating errors or return values. So, you
just have to send your errors or failures over such a conduit to get them
back into the test method. This is the sort of use case I had in mind for
deferreds and waitUntil().
How would you see this file would need to change to run two tests with
twisted in it?
http://lxr.osafoundation.org/m2crypto/source/tests/test_ssl.py
These are high-level integration tests, not unit tests, so it's hard to
say. The test reactor isn't going to help with this kind of testing. If I
were trying to unit test the wrappers that it appears to be testing, I
would do it without starting another process, and possibly without any
socket activity involved, testing only that the wrapper makes the right
calls or sends/receives the right data in response to those
operations. However, if the component was not designed for testability,
such tests might be difficult to create.
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Open Source Applications Foundation "Dev" mailing list
http://lists.osafoundation.org/mailman/listinfo/dev
