add quick_selenium script for quickly starting up a selenium interactively

notebook/tests/selenium/quick_selenium.py

@@ -0,0 +1,16 @@
+from selenium.webdriver import Firefox
+from notebook.notebookapp import list_running_servers
+
+
+def quick_driver():
+    """Quickly create a selenium driver pointing at an active noteboook server.
+
+    """
+    try:
+        server = list(list_running_servers())[0]
+    except IndexError as e:
+        e.message = 'You need a server running before you can run this command'
+    driver = Firefox()
+    auth_url = f'{server["url"]}?token={server["token"]}'
+    driver.get(auth_url)
+    return driver