Trailing slash has an effect on add_real_directory()

[ahshah]

Hi, i'm having a hard time understanding the role a trailing '/' character plays in pyfakefs' add_real_directory() call.

I saw this problem when trying to setup my timezone via pytz. Pytz seems to load the timezone information from a file with in it's installation directory. I've written two tests and ran them like so:

pytest -s test_pytz_fakefs_no_exception.py pytest -s test_pytz_fakefs_with_exception.py

test_pytz_fakefs_no_exception.py seems to fail while test_pytz_fakefs_no_exception.py seems to succeed and I just don't understand why the API would be so stringent. Anyway, thought I'd file it here if it were considered to be a bug.

I've attached the test cases to this ticket, thank you for taking a look.
tests.zip

Pytest/pyfakefs version:
$> pytest --version This is pytest version 3.9.3, imported from /usr/local/lib/python3.6/dist-packages/pytest.py setuptools registered plugins: pytest-mock-1.10.0 at /usr/local/lib/python3.6/dist-packages/pytest_mock.py pyfakefs-3.5 at /usr/local/lib/python3.6/dist-packages/pyfakefs/pytest_plugin.py

Python version:
$> python3 --version Python 3.6.6

[mrbean-bremen]

Thanks for the report!
The behavior is probably related to mkdir or makedirs, where a trailing slash is not allowed on some systems, IIRC. I agree that it is a needless restriction for our own functions, and can be removed. I will have a closer look in the evening, should be an easy fix.

[ahshah]

Thanks for the quick turn around, it maybe helpful to know I tired this on ubuntu 18.04 :)

[mrbean-bremen]

Thanks - this is really a minor change.