What steps will reproduce the problem?

from nose.tools import *

def check(a,b): assert_equal(a,b)

def test_generator(): check.description = 'test_fails' yield check, 1, 2

check.description = 'test_passes'
yield check, 1, 1

save as test.py in ./, run nosetests

What is the expected output? What do you see instead?

I would like to see:

$ nosetests

F.

FAIL: test_fails

instead I see:

$ nosetests

F.

FAIL: test_passes

What version of the product are you using? On what operating system?

10.4 on kubuntu intrepid

Please provide any additional information below.

Thank you for a very useful unit testing package. The test generators are very helpful, but there is a small problem in that the failure report does not list the function.description from the time of the failure, but rather the last description that was registered during execution.

This is a useful workaround:

from nose.tools import * from functools import partial

import copy

def check(a,b): assert_equal(a,b)

def test_generator(): f = partial(check, 1, 2) f.description = 'test_fails' yield (f, )

f = partial(check, 1, 1)
f.description = 'test_passes'
yield (f, )

For a few other ways to work around this issue see this post:

http://achinghead.com/archive/85/nosetests-generators-descriptions/

Actually this doesn't work when using the multiprocess plugin because the function re-loaded in the new process is actually 'partial' without the arguments, so nothing is called.

As #2 pointed, there is an alternative that uses classes, but this also suffers from problems when used with multiprocess. The reason is because the default makeTests function recognizes it is a 'class' and tries to load all its methods, even though the class is callable.

In order to circumvent this, it would be great if python nose recognized callable classes and treated that as functions instead of trying to load their methods (not sure if there are any compatibility issues here).

I am attaching a very short plugin called CallableClass that does this. It is enabled with --with-callableclass.

rosen diankov,

Another workaround would be to use a lambda wrapper. It's pretty much the same as the class method defined in comment 2.

from nose.tools import assert_equal

def get_check(desc): func = lambda a,b: assert_equal(a,b) func.description = desc return func

def test_generator(): yield get_check('test_fails'), 1, 2 yield get_check('test_passes'), 1, 1

Doesn't seem to work with multiprocess either though - I get: ERROR: Failure: ValueError (No such test )