Comment 9 for bug 1473401

Reviewed: https://review.openstack.org/204222
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=3f9927e399c683efe099778b8fecc1f2ac5447fd
Submitter: Jenkins
Branch: master

commit 3f9927e399c683efe099778b8fecc1f2ac5447fd
Author: Robert Collins <email address hidden>
Date: Wed Jul 22 06:59:30 2015 +1200

    Fixup uses of mock in hyperv tests

    I ended poking around a bit after mock 1.1.4.

    The current skip is fixable by using a stateful side effect - the only
    reason the test ever worked before is that mock 1.0.1 returned the
    same data from every read call, which was explicitly fixed in Python
    3.4.

    However one of the other 'fixes' was buggy: it works by making the
    strings match up but the code under test can be broken by not doing
    the second open/read and it will still pass : thus the test is invalid
    and should be skipped to avoid incorrect coverage stats.

    Change-Id: Idec1b6b24e6d9d4a7567ae1f7753bffb9cb8bd5b
    Closes-Bug: #1473401