[tests] Added sleep to selenium test

Author: pandafy

openwisp_controller/config/tests/test_selenium.py

@@ -252,7 +252,7 @@ def test_force_delete_device_with_deactivating_config(self):
         # to complete before trying to interact with the button,
         # otherwise the test may fail due to the button not being fully
         # visible or clickable yet.
-        time.sleep(0.5)
+        time.sleep(1)
         delete_confirm = self.find_element(
             By.CSS_SELECTOR, 'form[method="post"] input[type="submit"]', timeout=10
         )
@@ -285,6 +285,11 @@ def test_force_delete_multiple_devices_with_deactivating_config(self):
             By.CSS_SELECTOR, '#deactivating-warning .messagelist .warning p'
         )
         self.find_element(by=By.CSS_SELECTOR, value='#warning-ack').click()
+        # After accepting the warning, wee need to wait for the animation
+        # to complete before trying to interact with the button,
+        # otherwise the test may fail due to the button not being fully
+        # visible or clickable yet.
+        time.sleep(1)
         delete_confirm = self.find_element(
             By.CSS_SELECTOR, 'form[method="post"] input[type="submit"]'
         )