Vahid,
Vahid wrote
> Is it possible to write unit tests for programs based on the iText or
> iTextSharp?
Yes, to a certain extent.
> If yes, what should be tested? because the result is a binary file and
> it's a highly visual medium...
That depends on the functional specification of your code.
If it is specified to add some form field at some location, you can easily
check the result document for the presence of that field using AcroFields.
If it is specified to add some image or text on some page, you can use the
classes from the iText parser package to analyze the contents of that page.
...
If it is specified to create a beautyful flyer, though, you might be at a
loss when trying to measure beauty.
Regards, Michael
PS: Obviously there is some hazard in using the same library to create
something and test it. You can mitigate this by using libraries by different
vendors for production and test code, or at least different versions of the
same library, e.g. the current stable iText 5.x for the production code and
some fixed "trusted" iText version 5.y or even 4.2 ("trusted" as in "bugs
and shortcomings are well known") for test methods.
--
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