[boost] How do folks test serialization code?

Title almost says it all, how do you verify that your classes serialization code is truly platform independent, and doesn't accidently break later? I have some trivial tests that round trip to a stringstream using boost::archive::text_i/oarchive, but of course that only verifies that platform-specific serialization works. So what do folks do - generate text archives on different platforms, deserialize and compare? How does Boost.Serialization itself verify this? Cheers, John.