pathlib.Path(".").absolute() uses an unmocked os module

[tnek213]

Description
pathlib.Path(".").absolute() uses an unmocked os module and I can't find a way to reload it.

How To Reproduce

from pyfakefs.fake_filesystem_unittest import TestCase

import os
import pathlib


class Test(TestCase):
    def setUp(self):
        self.setUpPyfakefs()
        os.chdir("/")

    def test_cwd(self):
        print("cwd: %s" % os.getcwd())
        dot_abs = pathlib.Path(".").absolute()
        print("dot abs: %s" % dot_abs)
        print("exists dot abs: %s" % dot_abs.exists())

Prints the following when running test_cwd

cwd: /
dot abs: /home/k/PycharmProjects/mytestproj/tests
exists dot abs: False

While I expected:

cwd: /
dot abs: /
exists dot abs: True

As can be seen the file system is mocked, but os.getcwd() used by the absolute() function of Path isn't and returns the real cwd.

Enviroment

Linux-4.18.0-25-generic-x86_64-with-Ubuntu-18.10-cosmic
Python 3.6.8 (default, Apr  9 2019, 04:59:38) 
pyfakefs 4.0.2

[mrbean-bremen]

Thanks - I will have a look.

[mrbean-bremen]

@tnek213 - Thanks for catching this - I'm amazed that this came up only now!

[tnek213]

@mrbean-bremen Thank you! Both for the lib which seems awesome and the amazing response time!