错误当尝试读取使用应摩卡，＆Supertest

Question

JSON数组我有以下JSON有效载荷：

"app": { 
    "name": "myapp", 
    "version": "1.0.0", 
    "last_commit": { 
     "author_name": "Jon Snow" 
     "author_email": "my@email.com" 
    } 
} 

和以下.js文件（使用Mocha，Supertest和Should）：

var supertest = require('supertest') 
var should = require('should') 
var server = supertest.agent('http://localhost:3001') 

describe('GET /', function() { 
    it('should respond with JSON', function (done) { 
     server 
      .get('/') 
      .set('Accept', 'application/json') 
      .expect('Content-Type', /json/) 
      .expect(200) 
      .end(function (err, res) { 
       var payload = res.body.app; 
       payload.should.have.property("app"); 
       payload.should.have.property("name"); 
       payload.should.have.property("version"); 
       payload.should.have.property("last_commit"); 
       payload.should.have.property("last_commit.author_name"); 
       payload.should.have.property("last_commit.author_email"); 
       done(); 
      }); 
    }); 
}); 

当我测试应用程序时，我收到以下错误信息：

Uncaught AssertionError: expected Object { 
    "name": "myapp", 
    "version": "1.0.0", 
    "last_commit": Object { 
     "author_name": "Jon Snow" 
     "author_email": "my@email.com" 
    } 
} to have property 'last_commit.author_name' 

为什么我在这些行上收到断言错误？

payload.should.have.property("last_commit.author_name"); 
payload.should.have.property("last_commit.author_email"); 

Answer 1

断言正在寻找一个叫做last_commit.author_name属性，它不存在。你可能想把它分成两个断言。

payload.should.have.property("last_commit"); 
let last_commit = payload.last_commit; 
last_commit.have.property("author_name");