Update the test for the Demo Page

Author: mdmintz

examples/offline_examples/test_demo_page.py

@@ -1,3 +1,4 @@
+from selenium.webdriver.common.keys import Keys
 from seleniumbase import BaseCase
 
 
@@ -28,6 +29,11 @@ def test_demo_page(self):
         self.hover_and_click("#myDropdown", "#dropOption2")
         self.assert_text("Link Two Selected", "h3")
 
+        # Verify that moving a "slider" updates a progrss bar
+        self.assert_element('progress[value="50"]')
+        self.send_keys("#myslider", Keys.RIGHT + Keys.RIGHT)
+        self.assert_element('progress[value="100"]')
+
         # Verify that the "select" option updates a meter bar
         self.assert_element('meter[value="0.25"]')
         self.select_option_by_text("#mySelect", "Set to 75%")