py3: re-implement the BaseHTTPServer.test() function
The function is changed in python 3. So the latest version of function is
re-implemented. One can look at https://hg.python.org/cpython/file/3.5/Lib/http/server.py#l1184
and https://hg.python.org/cpython/file/2.7/Lib/BaseHTTPServer.py#l590 to see the change
# 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
from mercurial import (
lock as lockmod,
)
class delaylock(lockmod.lock):
def lock(self):
delay = float(os.environ.get('HGPRELOCKDELAY', '0.0'))
if delay:
time.sleep(delay)
res = super(delaylock, self).lock()
delay = float(os.environ.get('HGPOSTLOCKDELAY', '0.0'))
if delay:
time.sleep(delay)
return res
def extsetup(ui):
lockmod.lock = delaylock