view mercurial/utils/__init__.py @ 37010:8453699a1f21

util: observable proxy objects for sockets

We previously introduced proxy objects and observers for file objects
to help implement low-level tests for the SSH wire protocol.

In this commit, we do the same for sockets in order to help test the
HTTP server.

We only proxy/observe some socket methods. I didn't feel like
implementing all the methods because there are so many of them and
implementing them will provide no short term value. We can always
implement them later.

# no-check-commit because we implement foo_bar methods on stdlib types

Differential Revision: https://phab.mercurial-scm.org/D2721