Is there any point Unit testing serialization?

Question

I have a class that serializes a set of objects (using XML serialization) that I want to unit test.

My problem is it feels like I will be testing the .NET implementation

Answer 1

Do you need to be able to do backward compatibility? If so, it may be worth building up unit tests of files produced by old versions which should still be able to be deserialized by new versions.

Other than that, if you ever introduce anything "interesting" it may be worth a unit test to just check you can serialize and deserialize just to make sure you're not doing something funky with a readonly property etc.