tests/crashgetbundler.py

test: add a push race case where the raced push touch multiple heads

We check case where the raced push update all heads while the racing push
update one of them.

from __future__ import absolute_import

from mercurial.i18n import _
from mercurial import (
        changegroup,
        error,
        extensions
    )

def abort(orig, *args, **kwargs):
    raise error.Abort(_('this is an exercise'))

def uisetup(ui):
    extensions.wrapfunction(changegroup, 'getbundler', abort)