D339: tests: verify that peer instances only expose interface members

[durin42 (Augie Fackler)]

durin42 accepted this revision.
durin42 added a comment.
This revision is now accepted and ready to land.


  Might also be neat to have a test to assert the peer and legacy peer interfaces don't overlap?

REPOSITORY
  rHG Mercurial

REVISION DETAIL
  https://phab.mercurial-scm.org/D339

To: indygreg, #hg-reviewers, durin42
Cc: durin42, mercurial-devel