[poppler] Patch in progress - looking for annotation related unit test data

[Tobias Deiminger]

Hi folks!

Do you have PDF document(s) around that contain various types of 
annotations, for the sake of unit testing? (already checked 
git://git.freedesktop.org/git/poppler/test, no hit)

I'm asking because I'm working on a poppler patch and wanted to add unit 
tests before submitting it on bugzilla. The patch will add support for 
rendering individual annotations (as requested in [1]). The first 
version will have a QT5 API as

QImage Poppler::Annotation::renderToImage(double hDPI, double vDPI)

An obvious way to test this would be to render annotations from a test 
document and compare the resulting QImages with golden bitmaps. Do you 
think such a test will be maintainable? Rendering results might slightly 
change with algorithm evolution in splash/arthur/cairo versions, so the 
golden bitmap could need updates from time to time.

If I had to create test documents on my own, which authoring tools would 
you use? There's
-Poppler of course, but it lacks some annotation related features like 
saving appearance streams for self-created annotations into the PDF
-Adobe tools are often considered as reference, but I had to buy them 
first
-maybe the pdfcomment TeX package? No idea how complete the standard is 
implemented there...

Best
Tobias

[1] 
https://lists.freedesktop.org/archives/poppler/2017-April/012165.html