ensure extension app read config from file and cli

Author: echarles

jupyter_server/extension/application.py

@@ -108,6 +108,10 @@ def _default_extension_name(self):
 
     INVALID_EXTENSION_NAME_CHARS = [' ', '.', '+', '/']
 
+    def _config_file_name_default(self):
+        """The default config file name."""
+        return 'jupyter_{}_config'.format(self.extension_name)
+
     def _validate_extension_name(self):
         value = self.extension_name
         if isinstance(value, str):
@@ -211,6 +215,7 @@ def _prepare_config(self):
         """
         traits = self.class_own_traits().keys()
         self.extension_config = Config({t: getattr(self, t) for t in traits})
+        self.serverapp.web_app.settings['{}_config'.format(self.extension_name)] = self.extension_config
         self.settings['{}_config'.format(self.extension_name)] = self.extension_config
 
     def _prepare_settings(self):

jupyter_server/serverapp.py

@@ -1207,6 +1207,7 @@ def _update_server_extensions(self, change):
          """))
 
     def parse_command_line(self, argv=None):
+
         super(ServerApp, self).parse_command_line(argv)
 
         if self.extra_args:

jupyter_server/services/contents/tests/test_contents_api.py

@@ -507,7 +507,6 @@ def test_delete(self):
 
         for d in self.dirs + ['/']:
             nbs = notebooks_only(self.api.list(d).json())
-            print('------')
             print(d)
             print(nbs)
             self.assertEqual(nbs, [])