fix typing issue with latest ver of selenium

Author: rmorshea

src/idom/testing.py

@@ -25,8 +25,8 @@
 from uuid import uuid4
 from weakref import ref
 
-from selenium.webdriver import Chrome
 from selenium.webdriver.remote.webdriver import WebDriver
+from selenium.webdriver.remote.webdriver import WebDriver as Chrome
 
 from idom.config import IDOM_WEB_MODULES_DIR
 from idom.core.events import EventHandler, to_event_handler_function
@@ -52,6 +52,9 @@ def create_simple_selenium_web_driver(
     page_load_timeout: float = 5.0,
     window_size: Tuple[int, int] = (1080, 800),
 ) -> WebDriver:
+    if driver_options is None:
+        raise ValueError("Expected driver options")  # pragma: no cover
+
     driver = driver_type(options=driver_options)
 
     driver.set_window_size(*window_size)