Re add test_login_failure

common/test/acceptance/tests/lms/test_lms.py

@@ -120,6 +120,16 @@ class LoginFromCombinedPageTest(UniqueCourseTest):
         course_names = self.dashboard_page.wait_for_page().available_courses
         self.assertIn(self.course_info["display_name"], course_names)
 
+    def test_login_failure(self):
+        # Navigate to the login page
+        self.login_page.visit()
+
+        # User account does not exist
+        self.login_page.login(email="nobody@nowhere.com", password="password")
+
+        # Verify that an error is displayed
+        self.assertIn("Email or password is incorrect.", self.login_page.wait_for_errors())
+
     def test_toggle_to_register_form(self):
         self.login_page.visit().toggle_form()
         self.assertEqual(self.login_page.current_form, "register")