Initial commit: Telegram Management System

Full-stack web application for Telegram management
- Frontend: Vue 3 + Vben Admin
- Backend: NestJS
- Features: User management, group broadcast, statistics

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

marketing-agent/tests/helpers/database.js

@@ -0,0 +1,35 @@
+import mongoose from 'mongoose';
+import { MongoMemoryServer } from 'mongodb-memory-server';
+
+let mongoServer;
+
+export const connectDatabase = async () => {
+  mongoServer = await MongoMemoryServer.create();
+  const uri = mongoServer.getUri();
+  
+  await mongoose.connect(uri, {
+    useNewUrlParser: true,
+    useUnifiedTopology: true,
+  });
+};
+
+export const closeDatabase = async () => {
+  await mongoose.connection.dropDatabase();
+  await mongoose.connection.close();
+  if (mongoServer) {
+    await mongoServer.stop();
+  }
+};
+
+export const clearDatabase = async () => {
+  const collections = mongoose.connection.collections;
+  
+  for (const key in collections) {
+    const collection = collections[key];
+    await collection.deleteMany();
+  }
+};
+
+export const seedDatabase = async (model, data) => {
+  return await model.create(data);
+};