Protocol buffer messages are not being pretty printed

[rohitsaboo]

I'm unable to get protocol buffer messages to be pretty printed in my gtest failure messages.

My guess is that

googletest/googletest/include/gtest/internal/gtest-internal.h

Line 907 in 7cc548d

ImplicitlyConvertible<const T*, const ::proto2::Message*>::value> {

checks if the type is convertible to proto2::Message in order to pretty print protocol buffer messages, whereas in the open source implementation of protobufs, the type seems to be google::protobuf::Message.

[gennadiycivil]

I have been cleaning up older and inactive GitHub googletest issues. You may see an issue "closed" if it appears to be inactive/abandoned
Thank you

[inazarenko]

Open source protobuf messages derive from google::protobuf::MessageLite.

GTest enables ProtbufPrinter based on:

template <typename T>
struct IsAProtocolMessage
   : public std::is_convertible<const T*, const ::proto2::MessageLite*> {};

So open-source protobufs are printed as bytes.

This was previously closed as "inactive": #1102

The issue still occurs at current master.