feat: 优化考试记录接口，支持从任务反推科目名称；更新测试用例以验证新逻辑

test/user-records-subjectname.test.ts

@@ -0,0 +1,92 @@
+import test from 'node:test';
+import assert from 'node:assert/strict';
+import { randomUUID } from 'node:crypto';
+
+process.env.NODE_ENV = 'test';
+process.env.DB_PATH = ':memory:';
+
+const jsonFetch = async (
+  baseUrl: string,
+  path: string,
+  options?: { method?: string; body?: unknown },
+) => {
+  const res = await fetch(`${baseUrl}${path}`, {
+    method: options?.method ?? 'GET',
+    headers: options?.body ? { 'Content-Type': 'application/json' } : undefined,
+    body: options?.body ? JSON.stringify(options.body) : undefined,
+  });
+
+  const text = await res.text();
+  let json: any = null;
+  try {
+    json = text ? JSON.parse(text) : null;
+  } catch {
+    json = null;
+  }
+  return { status: res.status, json, text };
+};
+
+test('用户答题记录接口应返回subjectName（任务记录可从任务反推科目）', 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:${addr.port}`;
+
+    const userId = randomUUID();
+    const subjectId = randomUUID();
+    const taskId = randomUUID();
+    const recordId = randomUUID();
+
+    await run(`INSERT INTO users (id, name, phone, password) VALUES (?, ?, ?, ?)`, [
+      userId,
+      '测试用户',
+      '13800138111',
+      '',
+    ]);
+
+    await run(
+      `INSERT INTO exam_subjects (id, name, type_ratios, category_ratios, total_score, duration_minutes)
+       VALUES (?, ?, ?, ?, ?, ?)`,
+      [
+        subjectId,
+        '测试科目-任务关联',
+        JSON.stringify({ single: 100 }),
+        JSON.stringify({ 通用: 100 }),
+        100,
+        60,
+      ],
+    );
+
+    const now = new Date().toISOString();
+    await run(
+      `INSERT INTO exam_tasks (id, name, subject_id, start_at, end_at, selection_config)
+       VALUES (?, ?, ?, ?, ?, ?)`,
+      [taskId, '测试任务', subjectId, now, now, null],
+    );
+
+    // 模拟旧数据：quiz_records.subject_id 为空，仅有 task_id
+    await run(
+      `INSERT INTO quiz_records (id, user_id, subject_id, task_id, total_score, correct_count, total_count, created_at, score_percentage, status)
+       VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?)`,
+      [recordId, userId, null, taskId, 80, 16, 20, now, 80, '优秀'],
+    );
+
+    const res = await jsonFetch(baseUrl, `/api/quiz/records/${userId}`);
+    assert.equal(res.status, 200);
+    assert.equal(res.json?.success, true);
+    assert.ok(Array.isArray(res.json?.data));
+
+    const row = (res.json?.data as any[]).find((r) => r.id === recordId);
+    assert.ok(row);
+    assert.equal(row.taskName, '测试任务');
+    assert.equal(row.subjectName, '测试科目-任务关联');
+  } finally {
+    server.close();
+  }
+});