Mongoose -如何测试我的集合中的特定文档是否设置了所有字段

const mongoose = require('mongoose');

const userSchema = new mongoose.Schema({
  username: { type: String, required: true },
  email: { type: String, required: true },
  age: { type: Number, required: true },
  // 其他字段...
});

const User = mongoose.model('User', userSchema);

const chai = require('chai');
const expect = chai.expect;
const User = require('./models/user'); // 假设User模型定义在./models/user.js中

describe('User', function () {
  it('should have all required fields', function () {
    const user = new User({
      username: 'john',
      email: 'john@example.com',
      age: 25,
      // 其他字段...
    });

    expect(user).to.have.property('username');
    expect(user).to.have.property('email');
    expect(user).to.have.property('age');
    // 断言其他字段是否存在...

    expect(user.validateSync()).to.be.undefined; // 验证是否存在验证错误
  });
});