repoze.lru not installed in test venv

[Eric Harney]

We seem to be missing "repoze" from test-requirements.

I ran "run_tests.sh -V" on a Fedora 20 machine and many tests fail with this exception.

======================================================================
FAIL: unittest.loader.ModuleImportFailure.cinder.tests.test_test
----------------------------------------------------------------------
Traceback (most recent call last):
_StringException: Traceback (most recent call last):
ImportError: Failed to import test module: cinder.tests.test_test
Traceback (most recent call last):
  File "/usr/lib64/python2.7/unittest/loader.py", line 252, in _find_tests
    module = self._get_module_from_name(name)
  File "/usr/lib64/python2.7/unittest/loader.py", line 230, in _get_module_from_name
    __import__(name)
  File "/home/emh/src/cinder/cinder/tests/test_test.py", line 21, in <module>
    from cinder import test
  File "/home/emh/src/cinder/cinder/test.py", line 42, in <module>
    from cinder import service
  File "/home/emh/src/cinder/cinder/service.py", line 41, in <module>
    from cinder import wsgi
  File "/home/emh/src/cinder/cinder/wsgi.py", line 34, in <module>
    import routes.middleware
  File "/home/emh/src/cinder/.venv/lib/python2.7/site-packages/routes/__init__.py", line 140, in <module>
    from routes.mapper import Mapper
  File "/home/emh/src/cinder/.venv/lib/python2.7/site-packages/routes/mapper.py", line 7, in <module>
    from repoze.lru import LRUCache
ImportError: No module named repoze.lru

[Eric Harney (eharney)]

It looks like this is supposed to get pulled in as a dependency for Routes... unclear why this doesn't always happen.

Downloading/unpacking repoze.lru>=0.3 (from Routes>=1.12.3->-r /home/emh/src/cinder/requirements.txt (line 20))
  Downloading repoze.lru-0.6.tar.gz
  Running setup.py (path:/home/emh/src/cinder/.venv/build/repoze.lru/setup.py) egg_info for package repoze.lru

[Eric Harney (eharney)]

It appears that when installing requirements, the Routes package is installed into the venv before repoze.lru is. If you interrupt run_tests.sh at this point, and then re-run it (even with -U), Routes is considered "installed" and its dependencies are not checked, so the dependency is missing.

[Eric Harney (eharney)]

This seems to be a deficiency in how pip handles requirements checking, despite it saying that "--upgrade" is recursive. Will revisit if I can find some way to improve this.