Do not require entry-point dependencies in tests

In our tests, we load our entry-points using plain pkg_resources and in
doing so were requiring our dependencies to be checked for each plugin.
This was causing test errors on Python 3.5 running on some environments.

By using logic to load the entry-points as modern versions of setuptools
expect us to and defaulting requirement verification to False, we should
avoid these testing errors.

Change-Id: Id58861f72d399758178e0f11f617d2f178eddc4a
Closes-bug: #1630392

1 files changed, 13 insertions, 1 deletions

diff --git a/glance_store/tests/unit/test_opts.py b/glance_store/tests/unit/test_opts.py
index 2d85a05..ef73c4b 100644
--- a/glance_store/tests/unit/test_opts.py
+++ b/glance_store/tests/unit/test_opts.py
@@ -20,6 +20,18 @@ from glance_store import backend
 from glance_store.tests import base
 
 
+def load_entry_point(entry_point, verify_requirements=False):
+    """Load an entry-point without requiring dependencies."""
+    resolve = getattr(entry_point, 'resolve', None)
+    require = getattr(entry_point, 'require', None)
+    if resolve is not None and require is not None:
+        if verify_requirements:
+            entry_point.require()
+        return entry_point.resolve()
+    else:
+        return entry_point.load(require=verify_requirements)
+
+
 class OptsTestCase(base.StoreBaseTest):
 
     def _check_opt_groups(self, opt_list, expected_opt_groups):
@@ -43,7 +55,7 @@ class OptsTestCase(base.StoreBaseTest):
         opt_list = None
         for ep in pkg_resources.iter_entry_points('oslo.config.opts'):
             if ep.name == namespace:
-                list_fn = ep.load()
+                list_fn = load_entry_point(ep)
                 opt_list = list_fn()
                 break