fix(integration): simplify manual DingTalk sync setup

apps/server/src/integration/config/integration-config.service.spec.ts

@@ -0,0 +1,49 @@
+import { IntegrationConfigService } from './integration-config.service';
+
+describe('IntegrationConfigService.testConnection', () => {
+  const originalFetch = global.fetch;
+
+  afterEach(() => {
+    global.fetch = originalFetch;
+    jest.restoreAllMocks();
+  });
+
+  it('uses the saved AppSecret when testing an existing configuration with a blank secret', async () => {
+    const configRepo = {
+      findOne: jest.fn().mockResolvedValue({ id: 1, type: 'THIRD' }),
+    };
+    const detailRepo = {
+      findOne: jest.fn().mockResolvedValue({
+        configId: 1,
+        type: 'DINGTALK_SYNC',
+        content: JSON.stringify({
+          config: {
+            corpId: 'ding-corp',
+            agentId: 'saved-key',
+            appSecret: 'saved-secret',
+          },
+        }),
+      }),
+    };
+    global.fetch = jest.fn().mockResolvedValue({
+      json: jest.fn().mockResolvedValue({ accessToken: 'token' }),
+    }) as never;
+
+    const service = new IntegrationConfigService(configRepo as never, detailRepo as never);
+
+    await expect(
+      service.testConnection('DINGTALK', {
+        corpId: 'ding-corp',
+        agentId: 'saved-key',
+        appSecret: '',
+      }),
+    ).resolves.toBe(true);
+
+    expect(global.fetch).toHaveBeenCalledWith(
+      'https://api.dingtalk.com/v1.0/oauth2/accessToken',
+      expect.objectContaining({
+        body: JSON.stringify({ appKey: 'saved-key', appSecret: 'saved-secret' }),
+      }),
+    );
+  });
+});