TypeError：无法读取未定义的属性“地址”

Posted 2023-03-07

【中文标题】TypeError：无法读取未定义的属性“地址”

【英文标题】：TypeError: Cannot read property 'address' of undefined

【发布时间】：2020-02-27 01:39:26

【问题描述】：

我需要一些帮助来测试节点 js 代码。我正在使用 mocha 和 supertest 并且我不断收到与我的测试标题相同的错误。我还在使用 mongoose 连接到 mongo 服务器，并且在运行测试之前添加了一些来宾对象。我已经为此困扰了 2 天，因此不胜感激。

这是测试错误

  0 passing (96ms)
  1 failing

  1) Guestss
       GET /guests
         should GET all the guests:
     TypeError: Cannot read property 'address' of undefined
      at Test.serverAddress (node_modules/supertest/lib/test.js:55:18)
      at new Test (node_modules/supertest/lib/test.js:36:12)
      at Object.get (node_modules/supertest/index.js:25:14)
      at Context.<anonymous> (test/functional/api/guestTest.js:95:18)

这是测试代码

describe("GET /guests", () => 
        it("should GET all the guests", done => 
            console.log("before");
            request(server)
                .get("/guests")
                .set("Accept", "application/json")
                .expect("Content-Type", /json/)
                .expect(200)
                .end((err, res) => 
                    try 
                        expect(res.body).to.be.a("array");
                        expect(res.body.length).to.equal(2);
                        let result = _.map(res.body, guest => 
                            return 
                                name: guest.name,
                                people: guest.people,
                                roomno: guest.roomno,
                                breakfast: guest.breakfast,
                                roomtype: guest.roomtype,
                                check: guest.check
                            
                        );
                        expect(result).to.deep.include(
                            name: "Tommy blue",
                            people: 5,
                            roomno: 0,
                            breakfast: true,
                            roomtype: "family",
                            check: "waiting"
                        );
                        expect(result).to.deep.include(
                            name: "Chad Warren",
                            people: 2,
                            roomno: 45,
                            breakfast: true,
                            roomtype: "double",
                            check: "in"
                        );
                        done()
                     catch (e) 
                        done(e)
                    
                );
        );
    );

【问题讨论】：

也许 .expect("Content-Type", /json/) 应该是 .expect("Content-Type", "json")

【参考方案1】：

在调查之后，错误消息发送给我，而我只是没有导出我的服务器。

【参考方案2】：

这里也一样。我的测试有

const  app  = require('./app');

我的应用有

module.exports = app;  

我不得不将 app.js 行更改为像测试那样使用花括号：

module.exports =  app ;