Allows portable and hermetic testing of code which uses the go net package. Useful for all cases where a Unix socket would (or could) be used, but you don't actually need to cross process boundaries. Fully portable and should work even on operating systems without native Unix socket support.
Simple and light-weight implementation built on net.Pipe. Prefer this implementation if it works for you. Supports Listen, Dial and pairs. Without buffering, there is no difference between stream and message oriented sockets, so there is only one type of unbuffered connection. Unlike net.Pipe, these implement both net.Conn and net.PacketConn.
Buffered types emulate Linux's version of Unix sockets and are based on gVisor's Unix socket implementation. These are heavier weight than the unbuffered implementations, but should prevent deadlocks in applications which depend on socket buffering. These should work for all applications which do not depend on IP addresses or ports.
The modifications to gVisor's Unix socket implementation have been intentionally kept minimal, will all the complexity of adapting it to net interfaces in the top-level package.
memipnet provides full TCP and UDP loopback emulation.