new FT method & error element helper in functional_tests.test_list_item_validation; not yet passing, awaiting JS implementation

src/functional_tests/test_list_item_validation.py

@@ -4,6 +4,11 @@ from selenium.webdriver.common.keys import Keys
 from .base import FunctionalTest
 
 class ItemValidationTest(FunctionalTest):
+    # Helper functions
+    def get_error_element(self):
+        return self.browser.find_element(By.CSS_SELECTOR, ".invalid-feedback")
+
+    # Test methods
     def test_cannot_add_empty_list_items(self):
         self.browser.get(self.live_server_url)
         self.get_item_input_box().send_keys(Keys.ENTER)
@@ -48,7 +53,24 @@ class ItemValidationTest(FunctionalTest):
 
         self.wait_for(
             lambda: self.assertEqual(
-                self.browser.find_element(By.CSS_SELECTOR, ".invalid-feedback").text,
+                self.get_error_element().text,
                 "You've already logged this to your list",
             )
         )
+
+    def test_error_messages_are_cleared_on_input(self):
+        self.browser.get(self.live_server_url)
+        self.get_item_input_box().send_keys("Banter too thicc")
+        self.get_item_input_box().send_keys(Keys.ENTER)
+        self.wait_for_row_in_list_table("1. Banter too thicc")
+        self.get_item_input_box().send_keys("Banter too thicc")
+        self.get_item_input_box().send_keys(Keys.ENTER)
+        self.wait_for(
+            lambda: self.assertTrue(self.get_error_element().is_displayed())
+        )
+
+        self.get_item_input_box().send_keys("a")
+
+        self.wait_for(
+            lambda: self.assertFalse(self.get_error_element().is_displayed())
+        )