Tweak variable manager use in role includes to avoid test failures

lib/ansible/playbook/role/definition.py

@@ -159,9 +159,16 @@ class RoleDefinition(Base, Become, Conditional, Taggable):
             if self._role_basedir:
                 role_search_paths.append(self._role_basedir)
 
-            # now iterate through the possible paths and return the first one we find
+            # create a templar class to template the dependency names, in
-            all_vars = self._variable_manager.get_vars(loader=self._loader, play=self._play)
+            # case they contain variables
+            if self._variable_manager is not None:
+                all_vars = self._variable_manager.get_vars(loader=self._loader, play=self._play)
+            else:
+                all_vars = dict()
+
             templar = Templar(loader=self._loader, variables=all_vars)
+
+            # now iterate through the possible paths and return the first one we find
             for path in role_search_paths:
                 path = templar.template(path)
                 role_path = unfrackpath(os.path.join(path, role_name))

test/units/executor/test_play_iterator.py

@@ -56,7 +56,11 @@ class TestPlayIterator(unittest.TestCase):
             """,
         })
 
-        p = Playbook.load('test_play.yml', loader=fake_loader)
+        mock_var_manager = MagicMock()
+        mock_var_manager._fact_cache = dict()
+        mock_var_manager.get_vars.return_value = dict()
+
+        p = Playbook.load('test_play.yml', loader=fake_loader, variable_manager=mock_var_manager)
 
         hosts = []
         for i in range(0, 10):
@@ -68,9 +72,6 @@ class TestPlayIterator(unittest.TestCase):
         inventory.get_hosts.return_value = hosts
         inventory.filter_hosts.return_value = hosts
 
-        mock_var_manager = MagicMock()
-        mock_var_manager._fact_cache = dict()
-
         play_context = PlayContext(play=p._entries[0])
 
         itr = PlayIterator(

test/units/playbook/test_play.py

@@ -110,12 +110,15 @@ class TestPlay(unittest.TestCase):
             """,
         })
 
+        mock_var_manager = MagicMock()
+        mock_var_manager.get_vars.return_value = dict()
+
         p = Play.load(dict(
             name="test play",
             hosts=['foo'],
             gather_facts=False,
             roles=['foo'],
-        ), loader=fake_loader)
+        ), loader=fake_loader, variable_manager=mock_var_manager)
 
         blocks = p.compile()