fixes for ci

jupyterlab/browser_check.py

@@ -127,7 +127,7 @@ class BrowserApp(LabApp):
     test_browser = True
 
     def start(self):
-        web_app = self.web_app
+        web_app = self.serverapp.web_app
         web_app.settings.setdefault('page_config_data', dict())
         web_app.settings['page_config_data']['browserTest'] = True
         web_app.settings['page_config_data']['buildAvailable'] = False

jupyterlab/labapp.py

@@ -235,7 +235,7 @@ class LabWorkspaceExportApp(JupyterApp):
     """
     def start(self):
         app = LabApp(config=self.config)
-        base_url = app.base_url
+        base_url = app.serverapp.base_url
         config = load_config(app)
         directory = config.workspaces_dir
         app_url = config.app_url
@@ -284,7 +284,7 @@ class LabWorkspaceImportApp(JupyterApp):
 
     def start(self):
         app = LabApp(config=self.config)
-        base_url = app.base_url
+        base_url = app.serverapp.base_url
         config = load_config(app)
         directory = config.workspaces_dir
         app_url = config.app_url

jupyterlab/tests/test_build_api.py

@@ -81,7 +81,7 @@ class TestBuildAPI:
             res = r.body.decode()
         assert expected_http_error(e, 500)
 
-        loop = asyncio.get_running_loop()
+        loop = asyncio.get_event_loop()
         asyncio.ensure_future(build_api_tester.build(), loop=loop)
 
         while 1: