tests/mockblackbox.py

util: factor out shellsplit() function

It turned out to be more than the simple posix=True|False flag, so let's
introduce a platform function. I also made it py3 ready.

from __future__ import absolute_import
from mercurial import (
    util,
)

# XXX: we should probably offer a devel option to do this in blackbox directly
def getuser():
    return b'bob'
def getpid():
    return 5000

# mock the date and user apis so the output is always the same
def uisetup(ui):
    util.getuser = getuser
    util.getpid = getpid