Switch to pytest-mpl for image testing #1891
Merged
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With
pytest-mpl
, we can throw away a bunch of code for image comparison and testing. I don't consider that public API, so didn't bother writing any deprecation.To minimize changes, I returned
ax.figure
when we have an Axes, but no explicit Figure. Also, I added in a pytest hook to generate the baseline image directory in some manner that matches the old one.