如何正确测试将Mongoose查询作为Promise返回的函数

const mongoose = require('mongoose');
const chai = require('chai');
const expect = chai.expect;

before(function(done) {
  mongoose.connect('mongodb://localhost/testDB', { useNewUrlParser: true });
  const db = mongoose.connection;
  db.on('error', console.error.bind(console, 'connection error'));
  db.once('open', function() {
    console.log('Connected to the database');
    done();
  });
});

describe('Test Mongoose query as Promise', function() {
  it('should return a promise', function() {
    const query = YourModel.find({}); // 替换YourModel为实际的Mongoose模型
    expect(query.exec()).to.be.a('promise');
  });

  it('should resolve with the query result', function() {
    const query = YourModel.find({}); // 替换YourModel为实际的Mongoose模型
    return query.exec().then(function(result) {
      expect(result).to.be.an('array');
      // 进一步断言查询结果的正确性
    });
  });

  it('should reject with an error if the query fails', function() {
    const query = YourModel.find({}); // 替换YourModel为实际的Mongoose模型
    return query.exec().catch(function(error) {
      expect(error).to.be.an('error');
      // 进一步断言错误的正确性
    });
  });
});

mocha test.js