Hi Albert,
I see... perhaps I should start creating a testing repository, since
your approach appears to work pretty well. Thank you for sharing your
experience and for the imagemagick calls!
Best regards
Christian
Am 29.10.2010 20:08, schrieb Albert Astals Cid:
A Divendres, 29 d'octubre de 2010, Christian Feuersaenger va escriure:
Dear Developers,
I am author of a program which generates pdf output and as such I am
thinking about improvements to my regression tests... perhaps I can
learn from your very successful testing framework.
I wouldn't call it "very successful" nor "framework" as it's a 10 line bash
script :D
Is there some sort of automatic system which compares screenshots
somehow?
diff a.png b.png
If they are equal, good no change happened! If they are different then
convert a.png b.png -compose difference -composite -colorspace gray miff:- |
display
will give you an image with the differences, and
convert a.png b.png -compose difference -composite -colorspace gray miff:- |
identify -verbose -
will give you some interesting data and you can have look at the standard
deviation for example to know how much the rendering has changed
Albert
Or any other type of automatic comparison function? In that
case, I would be interested in using a similar approach for my own
work... and I would appreciate any hints.
Thanks!
Best regards
Christian
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