Hi there. Firstly, thanks for the great library. I've only run into one gripe so far.

There doesn't seem to be a way to compare only the public fields of a struct. For some reason assert.Equal compares private fields too. Why do I need this? To compare protobuf messages. The public fields are the actual valuable info, and the private fields are implementation details like "sizeCache" which are unimportant but still frequently different.