Someone contacted me recently and asked for a test on Grendel. I offered to write a short-answer test and post it on TeachersPayTeachers. (Unfortunately, since I do not have the teacher's name or email, I am unable to contact her.)
I re-read the book this weekend and started writing a test, but I gave up. Because of the plot and difficult names, the novel does not lend itself to a short-answer test. As a result, the questions I initially considered were either too easy or so difficult that students who read the book would have trouble answering them.
If I were testing students on the novel, I would give the attached 50-minute in-class essay test and allow students to use their books. Free