如何测试(通过jasmine)在我的mongo db中存在一个集合？

const mongoose = require('mongoose');

describe('MongoDB Collection Test', () => {
  let connection;
  let testCollection;

  beforeAll(async () => {
    // 连接到MongoDB
    connection = await mongoose.connect('mongodb://localhost/mydatabase', {
      useNewUrlParser: true,
      useUnifiedTopology: true,
    });

    // 定义测试用的集合名称
    testCollection = connection.collection('testCollection');
  });

  afterAll(async () => {
    // 断开与MongoDB的连接
    await connection.close();
  });

  it('should exist', async () => {
    // 检查集合是否存在
    const collections = await connection.db.listCollections().toArray();
    const collectionNames = collections.map((collection) => collection.name);

    expect(collectionNames).toContain('testCollection');
  });
});