Useful Testing Tricks

Regenerate Figure Hash Library

$ tox -e <tox-figure-env> -- --mpl-generate-hash-library=<figure-hash-json-file>

e.g.

$ tox -e py38-figure -- --mpl-generate-hash-library=ndcube/tests/figure_hashes_mpl_332_ft_261_astropy_41_sunpy_203.json