def test_uninstall_core_extension(self): uninstall_extension('@jupyterlab/console-extension') app_dir = get_app_dir() _ensure_package(app_dir) with open(pjoin(app_dir, 'staging', 'package.json')) as fid: data = json.load(fid) extensions = data['jupyterlab']['extensions'] assert '@jupyterlab/console-extension' not in extensions