Re: [matplotlib-devel] Image comparison decorators outside matplotlib

[Paul H. <pmh...@gm...>]

Eduard,

Did you make any progress on this? I'm trying to do the same thing and it's
skipping my tests entirely.
-paul


On Thu, Oct 10, 2013 at 5:41 AM, Eduard Bopp <edu...@ae...>wrote:

> Hello,
>
> I am developing a toolkit to parse, analyse and plot some scientific
> data using matplotlib. Among them are some application-specific plotting
> functions that sort of extend matplotlib.
>
> There are these nice image comparison decorators to test code like that
> but I am not sure how to use them for unit testing outside the scope of
> matplotlib itself. Is this use case intended and possible for the
> decorator?
>
> I have experimented with this unsuccessfully in the following way:
>
> There is a tests directory within my package with test functions
> decorated like so
>
> @image_comparison(baseline_images=['custom_function'])
> def test_custom_function():
>     # plot stuff...
>
> When I run nosetests, it fails creating some output images in
> result_images.
>
> Copying the appropriate files according to [1] to
> my_package/tests/baseline_images does not seem to have any effect. There
> are neither *-expected* nor *_{pdf,svg}.png files in there, only
> custom_function.{pdf,svg,png}. What am I doing wrong?
>
> Eduard
>
> [1] http://matplotlib.org/devel/testing.html
>
>
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