tests/mocktime.py

sparse: add test showing `hg merge` is broken while using sparse extension

This patch adds a test to demonstrate that `hg merge` is broken in some cases
while using sparse extension.

The case is when you have a file which is:

  * modified between current wdir parent and merge base
  * deleted between merge base and merge destination
  * excluded from sparse checkout

Doing `hg merge` results in file not found error. Next patch will fix this.

Differential Revision: https://phab.mercurial-scm.org/D3983

from __future__ import absolute_import

import os
import time

class mocktime(object):
    def __init__(self, increment):
        self.time = 0
        self.increment = [float(s) for s in increment.split()]
        self.pos = 0

    def __call__(self):
        self.time += self.increment[self.pos % len(self.increment)]
        self.pos += 1
        return self.time

def uisetup(ui):
    time.time = mocktime(os.environ.get('MOCKTIME', '0.1'))