From f8b9678e89b23a956b1248a03860a0d87cd43ef1 Mon Sep 17 00:00:00 2001
From: Kureszn <kuredavid980@gmail.com>
Date: Thu, 30 Jul 2026 13:59:20 +0100
Subject: [PATCH] test(useQuiz): assert second answer to same question is a
 no-op

---
 src/hooks/__tests__/useQuiz.test.tsx | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/src/hooks/__tests__/useQuiz.test.tsx b/src/hooks/__tests__/useQuiz.test.tsx
index d42bcce9..5ea706e6 100644
--- a/src/hooks/__tests__/useQuiz.test.tsx
+++ b/src/hooks/__tests__/useQuiz.test.tsx
@@ -71,6 +71,23 @@ describe('quiz grading helpers', () => {
 });
 
 describe('useQuiz', () => {
+  it('ignores a second answer to an already-answered question', () => {
+    const { result } = renderHook(() => useQuiz({ quiz: quizFixture, autoStart: false }));
+
+    act(() => {
+      result.current.actions.answerQuestion('mc-1', 'b'); // correct
+    });
+
+    const firstAnswer = result.current.answers['mc-1'];
+
+    act(() => {
+      result.current.actions.answerQuestion('mc-1', 'a'); // attempt to change to wrong
+    });
+
+    expect(result.current.answers['mc-1']).toBe(firstAnswer);
+    expect(result.current.score).toBe(2);
+  });
+
   it('tracks partial code-credit and regular grading without regressing score updates', () => {
     const { result } = renderHook(() => useQuiz({ quiz: quizFixture, autoStart: false }));