后台基本功能完成，待完善：普通用户前端页面

test/question-text-import.test.ts

@@ -260,3 +260,71 @@ test('前端文本解析支持 | 分隔格式', async () => {
   assert.equal(judgment.answer, '正确');
   assert.equal(judgment.analysis, '地球接近球体');
 });
+
+test('题目类别列表应返回题库数量统计', async () => {
+  const { initDatabase, run } = await import('../api/database');
+  await initDatabase();
+
+  const { app } = await import('../api/server');
+  const server = app.listen(0);
+
+  try {
+    const addr = server.address();
+    assert.ok(addr && typeof addr === 'object');
+    const baseUrl = `http://127.0.0.1:${addr.port}`;
+
+    await run(`DELETE FROM quiz_answers`);
+    await run(`DELETE FROM quiz_records`);
+    await run(`DELETE FROM questions`);
+    await run(`DELETE FROM question_categories`);
+
+    await run(`INSERT INTO question_categories (id, name) VALUES (?, ?)`, [randomUUID(), '空类别']);
+
+    const q1 = randomUUID();
+    const q2 = randomUUID();
+    const q3 = randomUUID();
+    const q4 = randomUUID();
+    const q5 = randomUUID();
+
+    await run(
+      `INSERT INTO questions (id, content, type, options, answer, score, category)
+       VALUES (?, ?, ?, ?, ?, ?, ?)`,
+      [q1, '数学题1', 'single', JSON.stringify(['A', 'B']), 'A', 5, '数学'],
+    );
+    await run(
+      `INSERT INTO questions (id, content, type, options, answer, score, category)
+       VALUES (?, ?, ?, ?, ?, ?, ?)`,
+      [q2, '数学题2', 'single', JSON.stringify(['A', 'B']), 'A', 5, '数学'],
+    );
+    await run(
+      `INSERT INTO questions (id, content, type, options, answer, score, category)
+       VALUES (?, ?, ?, ?, ?, ?, ?)`,
+      [q3, '英语题1', 'single', JSON.stringify(['A', 'B']), 'A', 5, '英语'],
+    );
+    await run(
+      `INSERT INTO questions (id, content, type, options, answer, score, category)
+       VALUES (?, ?, ?, ?, ?, ?, ?)`,
+      [q4, '通用题1', 'single', JSON.stringify(['A', 'B']), 'A', 5, '通用'],
+    );
+    await run(
+      `INSERT INTO questions (id, content, type, options, answer, score, category)
+       VALUES (?, ?, ?, ?, ?, ?, ?)`,
+      [q5, '空类别题(旧数据)', 'single', JSON.stringify(['A', 'B']), 'A', 5, ''],
+    );
+
+    const res = await jsonFetch(baseUrl, '/api/question-categories');
+    assert.equal(res.status, 200);
+    assert.equal(res.json?.success, true);
+    assert.equal(Array.isArray(res.json?.data), true);
+
+    const list = res.json?.data as any[];
+    const findByName = (name: string) => list.find((c) => c?.name === name);
+
+    assert.equal(findByName('数学')?.questionCount, 2);
+    assert.equal(findByName('英语')?.questionCount, 1);
+    assert.equal(findByName('通用')?.questionCount, 2);
+    assert.equal(findByName('空类别')?.questionCount, 0);
+  } finally {
+    await new Promise<void>((resolve) => server.close(() => resolve()));
+  }
+});