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Display relative image paths when tests fail. #7998

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Merged
merged 1 commit into from
Jan 31, 2017
Merged

Display relative image paths when tests fail. #7998

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6 changes: 4 additions & 2 deletions lib/matplotlib/testing/decorators.py
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Original file line number Diff line number Diff line change
Expand Up @@ -203,9 +203,11 @@ def _raise_on_image_difference(expected, actual, tol):
raise ImageComparisonFailure('image does not exist: %s' % expected)

if err:
for key in ["actual", "expected"]:
err[key] = os.path.relpath(err[key])
raise ImageComparisonFailure(
'images not close: %(actual)s vs. %(expected)s '
'(RMS %(rms).3f)' % err)
'images not close (RMS %(rms).3f):\n\t%(actual)s\n\t%(expected)s '
% err)


def _xfail_if_format_is_uncomparable(extension):
Expand Down