view tests/lockdelay.py @ 44147:5e84a96d865b

python-zstandard: blacken at 80 characters

I made this change upstream and it will make it into the next
release of python-zstandard. I figured I'd send it Mercurial's
way because it will allow us to drop this directory from the black
exclusion list.

# skip-blame blackening

Differential Revision: https://phab.mercurial-scm.org/D7937

# Dummy extension that adds a delay after acquiring a lock.
#
# This extension can be used to test race conditions between lock acquisition.

from __future__ import absolute_import

import os
import time


def reposetup(ui, repo):
    class delayedlockrepo(repo.__class__):
        def lock(self):
            delay = float(os.environ.get('HGPRELOCKDELAY', '0.0'))
            if delay:
                time.sleep(delay)
            res = super(delayedlockrepo, self).lock()
            delay = float(os.environ.get('HGPOSTLOCKDELAY', '0.0'))
            if delay:
                time.sleep(delay)
            return res

    repo.__class__ = delayedlockrepo