node.js - 使用 Chai 和 Mocha 对 Mongoose 模型进行单元测试

Question

我正在尝试使用 Mocha 和 Chai 在我的 Nodejs 应用程序上运行单元测试。我正在使用 Mongodb 和 Mongoose 框架。这是我的 Student.model.js

var mongoose = require('mongoose')
var studentsSchema = mongoose.Schema({
    _id: mongoose.Schema.Types.ObjectId,
    name: {
        type: String,
        required: true
    },
    email: String,
    phone: Number,
    address: String,
    username: String,
    password: String
});


var Students = mongoose.model('Student', studentsSchema);


module.exports = Students;

这是我的 Student.model.test.js

let assert = require('chai').assert;
var expect = require('chai').expect;
var mongoose = require('mongoose');
var Students = require('../models/students.model');

describe ('Student',function(){

    before(function (done) {
        mongoose.connect('mongodb://localhost/mongoose_basics');
        const db = mongoose.connection;
        db.on('error', console.error.bind(console, 'connection error'));
        db.once('open', function() {
          console.log('We are connected to test database!');
          done();
        });
      });

    it('student works!',function(){
        var s = new Students({name:'krishna'});

        s.save(err => {
            if(err) { return done(); }
            throw new Error('Should generate error!');
          });

    });
    after(function(done){
        mongoose.connection.db.dropDatabase(function(){
          mongoose.connection.close(done);
        });
      });

});

我想使用 Mocha 和 Chai 运行单元测试。当我运行 mocha Student.model.test.js 时，出现以下错误

TypeError: Students is not a constructor

我不确定为什么它不返回构造函数。

Answer 1

问题在于 require 语句仅导入与您的模型相关的函数，因此如果您想获取模型，请尝试以下语句:

var Students = require('../models/students.model').Students;

或