在没有mocha超时的情况下测试socket.on（'data'）回调

Question

尝试在节点中围绕TCP服务器并在Mocha中进行测试！

这是我到目前为止所做的：

在tcp-server.js

中

'use strict';
var net = require('net');
var fs = require('fs');

var server = module.exports.server = net.createServer(function(socket){
  socket.on('data', function(data){
    console.log(data.toString());
    var requestString = "Requested on: " + new Date().toString() + "\n" + data.toString();
    var writeStream = fs.createWriteStream("datalog.log", {'flags': 'a'});
    writeStream.write(requestString);
    writeStream.end();
  });

  socket.on('end', function(){
    console.log('socket closed');
  });
});

server.listen('3000', function(){
  console.log('server up');
});

在test.js中：

var fs = require('fs');
var net = require('net');
var expect = require('chai').expect;
var server = require(__dirname + "/../tcp-server.js").server;
var request = require('superagent');

describe('the tcp server', function() {

  beforeEach(function(){
    server.listen('3000', function(){
      console.log('server up in mocha!');
    });
  });

  it('should log all requests to a log file', function(done){
  request.get('http://localhost:3000').end(function(err, res){
    expect(true).to.equal(false); //This test doesn't run
    //eventually write some fs code that tests if the log file is written to;
      done();
    });
  });
});

看起来tcp-server.js中的console.log（data.toString（））行会触发，但console.log不会更新。当mocha超时（即没有done（）调用）时，日志似乎只会更新。

我有什么想法可以确保在'data'事件之后执行的所有操作都能执行，以便我可以检查日志是否已更新？

谢谢！

编辑：问题不在于测试，而在于TCP服务器（我没有正确关闭它）。

在tcp-server.js

中

'use strict';
var net = require('net');
var fs = require('fs');

var server = module.exports.server = net.createServer(function(socket){
  socket.on('data', function(data){
    var requestString = data.toString();
    var writeStream = fs.createWriteStream("datalog.log", {'flags': 'a'});
    writeStream.write(requestString);
    writeStream.end();
    socket.end();
  });

  socket.on('end', function(){
    console.log('socket closed');
    server.close();
  });
});

server.listen('3000', function(){
  console.log('server up');
});

var client = net.connect({port: 3000},
    function() { //'connect' listener
  console.log('connected to server!');
  client.write("Requested on: " + new Date().toString() + "\n");
});

在test.js

var fs = require('fs');
var net = require('net');
var expect = require('chai').expect;
var server = require(__dirname + "/../tcp-server.js").server;

describe('the tcp server', function() {
  var logstringBefore = "";
  var logstringAfter = "";

  before(function(done){
    fs.readFile('datalog.log', function(err, data){
      logstringBefore = data.toString();
      done();
    });
  });

  it('should log all requests to a log file and change it', function(done){
    server.listen('3000', function(){
    var requestString = "Requested on: " + new Date().toString();
      console.log('server up in mocha!');
      fs.readFile('datalog.log', function(err, data){
        logstringAfter = data.toString();
        expect(logstringAfter).to.include(requestString);
        expect(logstringBefore).to.not.equal(logstringAfter);
        done();
       });
    });
  });
});

Answer 1

应在done()执行完毕后调用{p> end()，即如下所示触发回调时。

还要考虑重新分解代码，如下所示。 server.listen()已移至before()，因此仅it()内describe() done() server.listen()内的所有it()执行一次describe('the tcp server', function() { before(function(done){ server.listen('3000', function(){ console.log('server up in mocha!'); done(); }); }); beforeEach(function(){}); it('should log all requests to a log file', function(done){ request.get('http://localhost:3000').end(function(err, res){ expect(true).to.equal(false); done(); }); }); }); 。这将确保服务器在<div id="output"></div> 执行之前就绪。

var obj = [{
        "Name" : "Test1",
        "check" : true
    }, {
        "Name" : "Test2",
        "check" : true
    }, {
        "Name" : "Test3",
        "check" : false
    }
];

function getNames(){
    var length=obj.length;
  //  alert(length);
    var op=[];
    for(var i=0;i<obj.length;i++){
     //   alert(obj[i].Name);
        op[i]='"'+obj[i].Name+'"';
    }
    document.getElementById("output").innerHTML=op;
}

getNames();