Permission denied: '/etc/glance/policy.json' when running tests

[Dan Prince]

I'm seeing the following error when running Glance's unit tests on my laptop:

======================================================================
ERROR: Missing default policy file should result in a default ruleset
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/dprince/projects/glance/glance/tests/unit/test_policy.py", line 134, in test_policy_file_default_not_found
    enforcer.enforce(context, 'get_image', {})
  File "/home/dprince/projects/glance/glance/api/policy.py", line 132, in enforce
    exception.Forbidden, action=action)
  File "/home/dprince/projects/glance/glance/api/policy.py", line 112, in _check
    self.load_rules()
  File "/home/dprince/projects/glance/glance/api/policy.py", line 64, in load_rules
    rules = self._read_policy_file()
  File "/home/dprince/projects/glance/glance/api/policy.py", line 94, in _read_policy_file
    with open(self.policy_path) as fap:
IOError: [Errno 13] Permission denied: '/etc/glance/policy.json'

-----------

The issue appears to be due to the fact that I *also* have the openstack-glance RPM installed (which creates an /etc/glance/policy.json file that I can read).

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/19475

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/19475
Committed: http://github.com/openstack/glance/commit/8726801d89dbaa116810318ea226a4693a68a8ca
Submitter: Jenkins
Branch: master

commit 8726801d89dbaa116810318ea226a4693a68a8ca
Author: Dan Prince <email address hidden>
Date: Fri Jan 11 14:18:30 2013 -0500

    Stub out find_file... fix policy.json test issue.

    Updates test_policy.py so that we stub out find_file
    which is used to find the *default* policy file. This
    fixes an issue in the test_policy_file_default_not_found
    test where it *may* fail when executed on a machine with
    Glance package(s) installed (thus created a file in /etc/glance/
    that isn't readable by the test user).

    Fixes LP Bug #1098687.

    Change-Id: If2912d40608ffb07f457454fdc6ebc56c62f6eaf