Tested _import_extension function as well.

force_bdss/bdss_application.py

@@ -37,8 +37,6 @@ class BDSSApplication(Application):
         else:
             plugins.append(CoreMCODriver())
 
-
-
         mgr = ExtensionManager(
             namespace='force.bdss.extensions',
             invoke_on_load=True,

force_bdss/tests/test_bdss_application.py

@@ -32,3 +32,13 @@ class TestBDSSApplication(unittest.TestCase):
                               "Exception. Message: hello")
         )
         self.assertEqual(plugins, [])
+
+    def test_import_extension(self):
+        plugins = []
+        plugin = mock.Mock()
+        ext = mock.Mock()
+        ext.obj = plugin
+        _import_extensions(plugins, ext)
+
+        self.assertEqual(plugins[0], plugin)
+