[scikit-image] Future of nose and issues for scikit-image

[Juan Nunez-Iglesias]

+1 for pytest.

Nelle, can you comment a bit on why scikit-learn effectively decided to roll their own test library? ;) Is it part of their general (and well-justified) aversion to new dependencies, or were there specific objections to pytest?

Pytest mostly works out of the box with tests written for nose. As far as I know the exceptions are:

- all the nose imports that Stéfan pointed out (btw how did an import * make its way into our codebase???)
- it seems that yielding tests is deprecated, so that will require a few rewrites.

It's not a trivial effort to fix these, but I don't think it'll be any bigger than any other move.

Juan.

On 1 Jan 2017, 10:26 AM +1100, Stefan van der Walt <stefanv at berkeley.edu>, wrote:
> On Sat, Dec 31, 2016, at 15:05, Steven Silvester wrote:
> > I agree with Stéfan that a forward-looking clean break would be best.  It looks like a rather large undertaking though, judging from https://github.com/matplotlib/matplotlib/pull/5405.
>
> Perhaps we are better off than matplotlib:
>
> $ git grep "from nose"
> skimage/_shared/testing.py:    from nose.tools import assert_less
> skimage/_shared/testing.py:    from nose.tools import assert_greater
> skimage/_shared/tests/test_testing.py:from nose.tools import (assert_true, assert_raises, assert_equal)
> skimage/draw/tests/test_draw3d.py:from nose.tools import raises
> skimage/io/tests/test_sift.py:from nose.tools import *
> skimage/novice/tests/test_novice.py:from nose.tools import assert_true
> skimage/segmentation/tests/test_quickshift.py:from nose.tools import assert_true
> skimage/util/tests/test_montage.py:from nose.tools import assert_equal, raises
> skimage/util/tests/test_shape.py:from nose.tools import raises
>
> Stéfan
>
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