tests/test-demandimport

demandimport: fix issue579 and add a test

fix suggested by Brendan

#!/usr/bin/env python

from mercurial import demandimport
demandimport.enable()

import re

rsub = re.sub
def f(obj):
    l = repr(obj)
    l = rsub("0x[0-9a-f]+", "0x?", l)
    l = rsub("from '.*'", "from '?'", l)
    return l

import os

print "os =", f(os)
print "os.system =", f(os.system)
print "os =", f(os)

import mercurial.version

print "mercurial.version =", f(mercurial.version)
print "mercurial.version.get_version =", f(mercurial.version.get_version)
print "mercurial.version =", f(mercurial.version)
print "mercurial =", f(mercurial)

from mercurial import util

print "util =", f(util)
print "util.system =", f(util.system)
print "util =", f(util)
print "util.system =", f(util.system)

import re as fred
print "fred =", f(fred)

import sys as re
print "re =", f(re)

print "fred =", f(fred)
print "fred.sub =", f(fred.sub)
print "fred =", f(fred)

print "re =", f(re)
print "re.stdout =", f(re.stdout)
print "re =", f(re)