test: add E2E tests for auto-reply settings (#868)

* test: add E2E tests for auto-reply settings

Add auto-reply.spec.ts with two test cases:
- GET empty → POST save → GET verify saved fields
- POST with too-long subject returns 400

Enable ENABLE_AUTO_REPLY in E2E wrangler config.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* test: add full fields and body assertion for too-long validation per review

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

e2e/fixtures/wrangler.toml.e2e

@@ -12,7 +12,7 @@ JWT_SECRET = "e2e-test-secret-key"
 BLACK_LIST = ""
 ENABLE_USER_CREATE_EMAIL = true
 ENABLE_USER_DELETE_EMAIL = true
-ENABLE_AUTO_REPLY = false
+ENABLE_AUTO_REPLY = true
 DEFAULT_SEND_BALANCE = 10
 ENABLE_ADDRESS_PASSWORD = true
 DISABLE_ADMIN_PASSWORD_CHECK = true

e2e/tests/api/auto-reply.spec.ts

@@ -0,0 +1,73 @@
+import { test, expect } from '@playwright/test';
+import { WORKER_URL, createTestAddress, deleteAddress } from '../../fixtures/test-helpers';
+
+test.describe('Auto Reply Settings', () => {
+  test('get empty, save, then verify saved settings', async ({ request }) => {
+    const { jwt } = await createTestAddress(request, 'auto-reply');
+
+    try {
+      // GET auto_reply — should return empty object for new address
+      const emptyRes = await request.get(`${WORKER_URL}/api/auto_reply`, {
+        headers: { Authorization: `Bearer ${jwt}` },
+      });
+      expect(emptyRes.ok()).toBe(true);
+      const empty = await emptyRes.json();
+      expect(Object.keys(empty)).toHaveLength(0);
+
+      // POST save auto_reply settings
+      const saveRes = await request.post(`${WORKER_URL}/api/auto_reply`, {
+        headers: { Authorization: `Bearer ${jwt}` },
+        data: {
+          auto_reply: {
+            name: 'Test Bot',
+            subject: 'Auto Reply',
+            source_prefix: 'Re:',
+            message: 'Thanks for your email!',
+            enabled: true,
+          },
+        },
+      });
+      expect(saveRes.ok()).toBe(true);
+      const saveBody = await saveRes.json();
+      expect(saveBody.success).toBe(true);
+
+      // GET auto_reply — should return saved settings
+      const savedRes = await request.get(`${WORKER_URL}/api/auto_reply`, {
+        headers: { Authorization: `Bearer ${jwt}` },
+      });
+      expect(savedRes.ok()).toBe(true);
+      const saved = await savedRes.json();
+      expect(saved.name).toBe('Test Bot');
+      expect(saved.subject).toBe('Auto Reply');
+      expect(saved.source_prefix).toBe('Re:');
+      expect(saved.message).toBe('Thanks for your email!');
+      expect(saved.enabled).toBe(true);
+    } finally {
+      await deleteAddress(request, jwt);
+    }
+  });
+
+  test('save with too long subject returns 400', async ({ request }) => {
+    const { jwt } = await createTestAddress(request, 'auto-reply-long');
+
+    try {
+      const saveRes = await request.post(`${WORKER_URL}/api/auto_reply`, {
+        headers: { Authorization: `Bearer ${jwt}` },
+        data: {
+          auto_reply: {
+            name: 'Bot',
+            subject: 'x'.repeat(256),
+            source_prefix: '',
+            message: 'Hello',
+            enabled: true,
+          },
+        },
+      });
+      expect(saveRes.status()).toBe(400);
+      const body = await saveRes.text();
+      expect(body).toContain('too long');
+    } finally {
+      await deleteAddress(request, jwt);
+    }
+  });
+});