Comment 3 for bug 1128952

Just a few comments:

convwatch looks like a bad idea and maybe a bit unreliable for libmspub, libvisio and libcdr

But since all three of them implement interfaces they could all easily use mocking similar to libcmis and orcus. The advantage with mocking compared to a visual comparison that I see is that as long as the libs are under heavy development you have a high rate of false positives while mocking allows you to concentrate on the features that you wish to test.