Update an example

Author: mdmintz

examples/handle_alert_test.py

@@ -7,6 +7,7 @@ def test_alerts(self):
         self.open("about:blank")
         self.execute_script('window.alert("ALERT!!!");')
         self.sleep(1)  # Not needed (Lets you see the alert pop up)
+        self.assert_true(self.is_alert_present())
         self.accept_alert()
         self.sleep(1)  # Not needed (Lets you see the alert go away)
         self.execute_script('window.prompt("My Prompt","defaultText");')
@@ -15,6 +16,7 @@ def test_alerts(self):
         self.assert_equal(alert.text, "My Prompt")  # Not input field
         self.dismiss_alert()
         self.sleep(1)  # Not needed (Lets you see the alert go away)
+        self.assert_false(self.is_alert_present())
         if self.browser == "safari" and self._reuse_session:
             # Alerts can freeze Safari if reusing the browser session
             self.driver.quit()