Re: [matplotlib-devel] Comparing pdf output in tests

[Jouni K. S. <jk...@ik...>]

Andrew Straw <str...@as...> writes:

> Michael Droettboom wrote:
>> We can probably standardize the version of gs on the buildbot machines, 
>> but it's been very useful up to now to have tests that can run on a 
>> variety of developer machines as well. 
>>
> I understood Jouni's idea to be to save the .pdfs as baseline images --
> then the same version of gs would be used to generated the rasterized
> images for the baseline and test result -- the version on your computer.
> I think this is the way to go (either that or compare the PDFs directly
> somehow).

Yes, that's what I meant: we want to test that the PDF file generated by
the code is "equivalent" to the baseline, and aside from some metadata
in the files, I think "equivalence" should mean that the files generate
the same rasterized output on some particular PDF renderer.

I suppose Ghostscript is widespread enough that we can assume that it
exists in the test environment? Or is there some buildout magic that we
should add in some file?

-- 
Jouni K. Seppänen
http://www.iki.fi/jks