tests/test-dirstate-backup.t

hbisect: pass repo into hbisect.bisect

Pass repo into the bisect function to get more flexibility in what we can call.
This will allow us to use revsets to rewrite parts of the ancestor and children
calculation in later patches.

Test Plan:
    python run-tests.py test-bisect*

Differential Revision: https://phab.mercurial-scm.org/D1497

Set up

  $ hg init repo
  $ cd repo

Try to import an empty patch

  $ hg import --no-commit - <<EOF
  > EOF
  applying patch from stdin
  abort: stdin: no diffs found
  [255]

No dirstate backups are left behind

  $ ls .hg/dirstate* | sort
  .hg/dirstate