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				<section>
					<h1>Node && js = 全栈</h1>
					<p>高可用架构专用</p>
					<p>
						<small>Created by <a href="https://cnodejs.org/user/i5ting">i5ting</a> / <a href="http://github.com/i5ting">@i5ting</a></small>
					</p>
				</section>

				<section>
					
					<section data-background="#dddddd">
						<h2>Abount Me</h2>
						<p>
							i5ting 一个开源爱好者
						</p>
						<a href="#" class="navigate-down">
							<img width="600" height="338" data-src="images/me.png" alt="Down arrow">
						</a>
					</section>
          
					<section data-background="#dddddd">
  					<h2>Node全栈公众号</h2>
  					<p>
  						<p>什么是全栈？一直站在前面讲么？</p>
  						<br>
              <img src='images/nodeonly-wechat.png'/>
  					</p>
            
  					<aside class="notes">
  						Oh hey, these are some notes. They'll be hidden in your presentation, but you can see them if you open the speaker notes window (hit 's' on your keyboard).
  					</aside>
					</section>
          
				</section>
        
        
        <section>
          <section data-markdown>
            ## 主要内容
            
            1. Why Node.js ？
            1. 我眼中的Node.js核心
            1. 快速开发实践
            1. 全栈 or 全烂 ？
            1. 未来
            
          </section>
          
          <section data-markdown>
              ## 推荐技术栈
            
              - express 4.x （express最新版本，初学者先别去碰koa）
              - mongoose（mongodb）
              - bluebird（Promise/A+实现）
              - jade（视图层模板）
              - mocha（测试）
              - node-inspector(调试)

              https://github.com/i5ting/express-starter
          </section>
				</section>
        
				<section data-transition="slide" data-background="#4d7e65" data-background-transition="zoom">
          <section data-transition="slide" data-background="#4d7e65" data-background-transition="zoom">
					<h2>Part 1：Why Node.js ？</h2>
					<p>
						以前？现在？
					</p>
					<pre><code>已经7岁的Node.js，你还熟悉么？</code></pre>
          </section>
          
          <section data-markdown>
              ## 以前我们总是喜欢拿异步说事儿
              
              - event-driven
              - non-blocking I/O
              
              结果，今天。。。各种【异步模型】烂大街了
          </section>
          
          <section data-markdown>
              ## 今天，我们拿什么吹牛呢？
  
              ```
              Node.js' package ecosystem, npm, is the largest ecosystem 
              of open source libraries in the world.
              ```
          </section>
          
          <section data-markdown>
              ## 为什么我们选择Node.js ？
              
              即使不优化，性能比其他语言好
              
              即使优化，也比其他语言简单
            
          </section>
          
          <section data-markdown>
              ## 我们的瓶颈在哪里 ？
              
              - 人（天津招不到人）
              - 开发速度（创业公司，跑。。。）
              - 传承（以后也要）
          </section>
          
          <section data-markdown>
              ## http verbs -1
              
              verbs = 动词

              http://www.w3.org/Protocols/rfc2616/rfc2616-sec9.html
              
              ```
              app.get('/user:id', function (req, res) {
                res.send('Hello World!');
              });

              app.post('/user/create', function (req, res) {
                res.send('Got a POST request');
              });

              app.put('/user/:id', function (req, res) {
                res.send('Got a PUT request at /user');
              });

              app.delete('/user/:id', function (req, res) {
                res.send('Got a DELETE request at /user');
              });
              ```
              
          </section>
          
          <section data-markdown>
              ## http verbs -2
              
              链式写法？
              
              ```
              router.route('/')
                .get($.list)
                .post($.create);
              ```
              
              all代表什么？
              
              ```
              router.all('/new', $.new);  
              ```
              
              更多node里的verbs（26个），见 https://github.com/jshttp/methods/blob/master/index.js
          </section>
          
          
          <section data-markdown>
              ## http status code
              
              - http://www.restapitutorial.com/httpstatuscodes.html
              - https://github.com/nodejs/io.js/blob/master/lib/_http_server.js

              ```
              500 : 'Internal Server Error',
              403 : 'Forbidden',
              404 : 'Not Found',
              304 : 'Not Modified',
              200 : 'OK',
              
              app.get('/user/:id', function(req, res){
                res.status(200).json({
                  a : 1,
                  b : 2
                });
              });
              ```
          </section>
          
          <section data-markdown>
              ## req取参数的3种方法
              
              expressjs里的请求参数，4.x里只有3种
              
              - req.params
              - req.body
              - req.query
              - 已经废弃的api：req.param
          </section>
          
          <section data-markdown>
              - req.params

              ```
              app.get('/user/:id', function(req, res){
                res.send('user ' + req.params.id);
              });
              ```
              
              俗点：取带冒号的参数
          </section>
          
          <section data-markdown>
              - req.body

              ```
              var app = require('express')();
              var bodyParser = require('body-parser');

              app.use(bodyParser.json()); // for parsing application/json
              app.use(bodyParser.urlencoded({ extended: true })); // for parsing application/x-www-form-urlencoded

              app.post('/', function (req, res) {
                console.log(req.body);
                res.json(req.body);
              })
              ```
              
              可以肯定的一点是req.body一定是post请求，express里依赖的中间件必须有bodyParser，不然req.body是没有的。
          </section>
          
          <section data-markdown>
              - req.query

              ```
              // GET /search?q=tobi+ferret
              req.query.q
              // => "tobi ferret"

              // GET /shoes?order=desc&shoe[color]=blue&shoe[type]=converse
              req.query.order
              // => "desc"

              req.query.shoe.color
              // => "blue"

              req.query.shoe.type
              // => "converse"
              ```
              
              query是querystring

          </section>
          
          <section data-markdown>
              - req.query不一定是get

              ```
              // POST /search?q=tobi+ferret
              {a:1,b:2}
              req.query.q
              // => "tobi ferret"
              ```
             
              post里的数据看不到得，需要用req.body取
          </section>
          
          
          <section data-markdown>
              - 3种不同类型的post
          </section>
          
          <section data-markdown>
              - Post with x-www-form-urlencoded
              
              see post.html
              
              ```
              $.ajaxSetup({
                contentType: "application/x-www-form-urlencoded; charset=utf-8"
              });

              $.post("/users/post", { name: "i5a6", time: "2pm" },
                 function(data){
                   console.log(data);
                 }, "json");
              ```
              
              in routes/users.js

              ```
              router.post('/post', function(req, res) {
                // res.send('respond with a resource');
                  res.json(req.body);
              });
              ```
          </section>
          
          <section data-markdown>
              #### Post with form-data 主要目的是为了上传
              
              
              ```
              var express = require('express')
              var multer  = require('multer')

              var app = express()
              app.use(multer({ dest: './uploads/'}))
              ```
              
              You can access the fields and files in the request object

              ```
              router.post('/post-form-data', function(req, res) {
                console.log(req.body)
                console.log(req.files)
              });
              
              ```
              
              Multer will not process any form which is not multipart/form-data
              
          </section>
          
          <section data-markdown>
              - Post with raw
              
              To get the raw body content of a request with Content-Type: "text/plain" into req.rawBody you can do:
              
              ```
              var express = require('./')
              var app = express();
              app.use(function(req, res, next){
                if (req.is('text/*')) {
                  req.text = '';
                  req.setEncoding('utf8');
                  req.on('data', function(chunk){ req.text += chunk });
                  req.on('end', next);
                } else {
                  next();
                }
              });
              app.post('/', function(req, res){
                res.send('got "' + req.text + '"');
              });
              app.listen(3000)
              ```
          </section>
          
          
          <section data-markdown>
              ## 命令行玩法
              
              ```
              #! /bin/bash

              echo -n "post common"
              curl -d "a=1&b=2" http://127.0.0.1:3001/users/post

              echo -n 'post formdata'
              curl -F 'pic=@"img/post-common.png"' -F 'a=1' -F 'b=2'  http://127.0.0.1:3001/users/post/formdata

              echo -n 'post raw json'

              curl -d "{"a":"1","b":"2","c":{"a":"1","b":"2"}}" http://127.0.0.1:3001/users/post
              ```
              
              如不清楚，请 `man curl`.
          </section>
          
          <section data-markdown>
              ## supertest用法
              
              https://github.com/expressjs/restful-router/blob/master/test/restful-router.test.js
              
              ```
              var request = require('supertest');
              var app = require('../example/app');
              
              describe('restful-router.test.js', function () {
                it('should get /users/new => user.new', function (done) {
                   request(app)
                   .get('/users/new')
                   .expect('GET /users/new => new, query: {}')
                   .expect(200, done);
                 });
               });
              ```
          </section>
          
          <section data-markdown>
              ## what is rest?
              
              参考阮一峰的文章http://www.ruanyifeng.com/blog/2011/09/restful.html
              
              ```
              /**
               * Auto generate RESTful url routes.
               *
               * URL routes:
               *
               *  GET    /topics[/]        => topic.list()
               *  GET    /topics/new       => topic.new()
               *  GET    /topics/:id       => topic.show()
               *  GET    /topics/:id/edit  => topic.edit()
               *  POST   /topics[/]        => topic.create()
               *  PATCH  /topics/:id       => topic.update()
               *  DELETE /topics/:id       => topic.destroy()
               *
               */
               ```
          </section>
          
          <section data-markdown>
              ## restful api or res.api？
              
              res.api is an express middleware for render json api , it convention over api format like this :

              ```
              {
                data: {

                },
                status: {
                  code : x,
                  msg  : 'some message'
                }
              }
              ```
              
              - 客户端 API 开发总结 https://cnodejs.org/topic/552b3b9382388cec50cf6d95
              - res.api用法说明 https://cnodejs.org/topic/55818a0c395a0c1812f18273
              
          </section>
          
     
  				<section>

						<h2>如果还不懂http协议?</h2>
            花点时间会用个软件就能学会，有兴趣吗？
            
						<p class="fragment">
              推荐Postman
              <img width="1000" height="538" data-src="images/postman.png" alt="Down arrow">
            </p>

				</section>
        
        
  		  <section>
          <h2>如果还还不懂http协议?</h2>
          看书吧
					<p class="fragment">推荐1
            <a href='http://ccbikai.gitbooks.io/http-book/content/index.html'>《HTTP下午茶》
            </a> 
          </p>
				 
				  <p class="fragment">推荐2
           <a href='http://product.china-pub.com/3769819'>《图解HTTP》
           </a> 
         </p>
			  </section>
      </section>
        
        
				<section data-transition="slide" data-background="#b5533c" data-background-transition="zoom">
        
  				<section data-transition="slide" data-background="#b5533c" data-background-transition="zoom">
  					<h2>Part 2：我眼中的Node.js核心</h2>
  					<p>
              MEAN
  					</p>
            <li>异步流程控制
            <li>cli（scaffold）
            <li>web framework
          </section>
          
         
          <section data-markdown>

- mongoose用法
    
```
var mongoose = require('mongoose');
mongoose.connect('mongodb://localhost/test');

var Cat = mongoose.model('Cat', { name: String });

var kitty = new Cat({ name: 'Zildjian' });
kitty.save(function (err) {
  if (err) // ...
  console.log('meow');
});
```
          </section>
          <section data-markdown>
            ## crud（增删改查）
            
            - save
            - find | findOne
            - update
            - remove
            
            ```
            Kitten.find({ name: /^Fluff/ }, callback)
            Comment.remove({ title: 'baby born from alien father' }, callback);
            MyModel.update({ age: { $gt: 18 } }, { oldEnough: true }, fn);
            ```
          </section>
          
          <section data-markdown>
            - 了解分页
            
            常见写法
            ```
            db.users.find().skip(pagesize*(n-1)).limit(pagesize)
            ```
            
            更好的写法
            ```
            db.usermodels.find({'_id' :{
               "$gt" :ObjectId("55940ae59c39572851075bfd")} 
             }).limit(20).sort({_id:-1})
            ```
          </section>
          
          <section data-markdown>
            - 了解关系（1对1，1对多）在mongoose里如何实现
            
            ```
            UserSchema = new Schema({
                ...
                contacts:[]
            });
            ```
          </section>
          
          <section data-markdown>
            - 了解关系（1对1，1对多，多对多）在mongoose里如何实现
            
            ```
            ContactSchema = new Schema({
                ...
                owner: {
                  type: Schema.ObjectId,
                  required: true,
                  index: true
                }
            });
            ```
          </section>
          
          
          <section data-markdown>
            - 了解populate
            
            ```
            ContactSchema = new Schema({
                ...
                owner: {
                  type: Schema.ObjectId,
                  ref: ‘user’ 
                }
            });
            
            ContactSchema.find({}).populate(‘owner’).exec(callback);
            
            ```
          </section>
          
          
          <section data-markdown>
            - 扩展mongoose模型：statics类方法
            
            ```
            UserSchema.statics.find_by_openid = function(openid, cb) {
              return this.findOne({
                openid: openid
              }, cb);
            };
            ```
            
            调用
            
            ```
            User.find_by_openid(openid, cb)
            ```
            
            
          </section>
          
          <section data-markdown>
            - 扩展mongoose模型：methods对象方法
            
            ```
            UserSchema.methods.is_exist = function(cb) {
              var query;
              query = {
                username: this.username,
                password: this.password
              };
              return this.model('UserModel').findOne(query, cb);
            };
            ```
            
            调用
            
            ```
            var user = new User({});
            user.is_exist(cb)
            ```
            
          </section>
          
          
          <section data-markdown>
            - hook.js
            - 了解pre和post的差别
            
            ```
            UserSchema.pre('save', function(next) {
                var user = this;
                if (!user.isModified('password')) return next();
                bcrypt.genSalt(SALT_WORK_FACTOR, function(err, salt) {
                  if (err) return next(err);
                  bcrypt.hash(user.password, salt, function (err, hash) {
                    if (err) return next(err);
                      user.password = hash;
                      next();
                    });
                });
            });
            ```
          </section>
          
          <section data-markdown>
            - 了解virtual属性
            
            ```
            UserSchema.virtual('is_valid').get(function(){
              console.log('phone_number = ' +this.phone_number)
              if(this.phone_number == undefined | this.invite_code == undefined){
                return false;
              }
              return this.invite_code.length >= 2 && this.phone_number > 0
            });
            ```
          </section>
          
          
          <section data-markdown>
            - 了解mongoose的插件机制
            
            ```
            // lastMod.js
            module.exports = exports = function lastModifiedPlugin (schema, options) {
              schema.add({ lastMod: Date })
  
              schema.pre('save', function (next) {
                this.lastMod = new Date
                next()
              })
  
              if (options && options.index) {
                schema.path('lastMod').index(options.index)
              }
            }
            ```
            
            调用
            
            ```
            // game-schema.js
            var lastMod = require('./lastMod');
            var Game = new Schema({ ... });
            Game.plugin(lastMod, { index: true });
            ```
          </section>
          
          
          <section data-markdown>
            - 了解索引优化
            
            ```
            ContactSchema = new Schema({
                ...
                owner: {
                  type: Schema.ObjectId,
                  required: true,
                  index: true
                }
            });
            ```
            也可以这样的
            
            ```
            ContactSchema.ensureIndexes(owner);
            ```
          </section>
          
          <section data-markdown>
            - 了解explain
            
            ```
            db.usermodels.find({
              '_id' :{ 
                "$gt" :ObjectId("55940ae59c39572851075bfd")
              } 
            }).explain()
            
            关注点
            
            - stage：查询策略
            - nReturned：返回的文档行数
            - needTime：耗时（毫秒）
            - indexBounds：所用的索引
            ```
            
            
          </section>
          
          <section data-markdown>
            - 了解profile
            
            
            ```
            profile级别有三种：
            
            - 0：不开启
            - 1：记录慢命令，默认为大于100ms
            - 2：记录所有命令
            - 3、查询profiling记录
            ```
            
            开启
            
                db.setProfilingLevel(2, 20)

            默认记录在system.profile中

                db['system.profile'].find()
          </section>
          
          <section data-markdown>
            ## 了解mongodb的部署
            
            - replset
            - shard
            
            
            ```
            我写的《 mongodb运维之副本集实践》
            https://cnodejs.org/topic/5590adbbebf9c92d17e734de
            ```
          </section>
          
          
          <section data-markdown>
            ## mongoosedao
            
            模型
            
            ```
            var TopModel = mongoose.model('TopModel', TopSchema); 
            var TopModelDao = new MongooseDao(TopModel);
            module.exports = TopModelDao;
            ```
            
            用法
            
            ```
            require('./db');

            var User = require('./User');

            User.create({"username":"sss","password":"password"},function(err, user){
              console.log(user);
            });

            User.delete({"username":"sss"},function(err, user){
              console.log(user);
            });
            ```
            
            https://github.com/moajs/mongoosedao
          </section>
          
          
				</section>        
        
				<section data-transition="slide" data-background="#9c56b9" data-background-transition="zoom">
  				<section data-transition="slide" data-background="#9c56b9" data-background-transition="zoom">
  					<h2>Part 3：快速开发实践</h2>
  					<p>
 						A promise is defined as an object that has a function as the value for the property then: then(fulfilledHandler, errorHandler, progressHandler)
  					</p>
  					<pre><code style="word-wrap: break-word;">http://promisesaplus.com/</code></pre>
          </section>     


          <section data-markdown>
            - mvc还是那个mvc
            
            ![](images/mvc.png)
          </section>
          <section data-markdown>
            - 代码结构
            
            ![](images/models.png)
          </section>
          
          
          <section data-markdown>
            - 了解jquery里的then和$.deferred
            
            ```
            function successFunc(){ console.log( “success!” ); }   
            function failureFunc(){ console.log( “failure!” ); }   
  
            $.when(   
               $.ajax( "/main.php" ),  
               $.ajax( "/modules.php" ),  
               $.ajax( “/lists.php” )  
            ).then( successFunc, failureFunc );
            ```
          </section>     
          <section data-markdown>
            ## 了解的node的异步
            
            - 一切都是异步的
            - 同步是奢求，要查Api
            
            ![](images/api.png)
          </section>
          
          <section data-markdown>
            ## 了解异步的恶心
            
            > 1. 用户登录 2. 增加用户日志 3. 更新用户登录次数
            
            ![](images/cb.png)
          </section>
          
          <section data-markdown>
            ## 如果用promise写呢？
            
            ![](images/cb_with_promise.png)
          </section>
          
          <section data-markdown>
            ## 如何实现一个promise库
            
            - 了解的then
            
            ```
            var promise = {
              okCallbacks: [],
              koCallbacks: [],
              then: function (okCallback, koCallback) {
                okCallbacks.push(okCallback);
                if (koCallback) {
                  koCallbacks.push(koCallback);
                }
              }
            }
            ```
          </section>
          
          <section data-markdown>
            ## 如何实现一个promise库
            
            - 了解的resolve和reject
            
            ```
            var defer = {
              promise: promise,
              resolve: function (data) {
                this.promise.okCallbacks.forEach(function(callback) {
                  window.setTimeout(function () {
                    callback(data)
                  }, 0);
                });
              },

              reject: function (error) {
                this.promise.koCallbacks.forEach(function(callback) {
                  window.setTimeout(function () {
                    callback(error)
                  }, 0);
                });
              }
            };
            ```
          </section>
          
          <section data-markdown>
            ## 如何实现一个promise库
          
            - 测试代码
            
            ```
            function test() {
              var defer = new Defer();
              // an example of an async call
              serverCall(function (request) {
                if (request.status === 200) {
                  defer.resolve(request.responseText);
                } else {
                  defer.reject(new Error("Status code was " + request.status));
                }
              });
              return defer.promise;
            }
            test().then(function (text) {
              alert(text);
            }, function (error) {
              alert(error.message);
            });
            ```
          </section>
          
          
          <section data-markdown>
            - 了解异步基本场景，比如waterfall这样的路程使用async如何处理
            
            ```
            var async = require('async');
            async.waterfall([
                function(callback) {
                    callback(null, 'one', 'two');
                },
                function(arg1, arg2, callback) {
                  // arg1 now equals 'one' and arg2 now equals 'two'
                    callback(null, 'three');
                },
                function(arg1, callback) {
                    // arg1 now equals 'three'
                    callback(null, 'done');
                }
            ], function (err, result) {
                // result now equals 'done'
            });
            ```
          </section>
          
          <section data-markdown>
          - 了解q和bluebird用法（如果有angularjs经验，推荐q，其他只推荐bluebird）
            
          </section>
          
          <section data-markdown>
            - 了解bluebird的promisifyAll用法
            
            ```
            //Read more about promisification in the API Reference:
            //API.md
            var fs = Promise.promisifyAll(require("fs"));

            fs.readFileAsync("myfile.json").then(JSON.parse).then(function (json) {
                console.log("Successful json");
            }).catch(SyntaxError, function (e) {
                console.error("file contains invalid json");
            }).catch(Promise.OperationalError, function (e) {
                console.error("unable to read file, because: ", e.message);
            });
            ```
          </section>
          
          <section data-markdown>
            - model上应用promisifyAll
            
            ![](images/model-promisefy.png)
          </section>
          
          <section data-markdown>
            - 了解如何重构流程，以及代码的可读性   
          </section>
          
          <section data-markdown>
            - controller上应用promisifyAll
            
            ![](images/controller-promisefy.png)
          </section>
          
          <section data-markdown>
            - more
            
            https://github.com/kriskowal/q/tree/v1/design
            
          </section>
          
				</section>
        
				<section data-transition="slide" data-background="#e87e04" data-background-transition="zoom">
          <section data-transition="slide" data-background="#e87e04" data-background-transition="zoom">
					<h2>Part 4：tdd/bdd测试</h2>
          <br>
          <p>朴灵说：“不写测试的项目都不是好项目”</p>
  
          </section>
          
          
          <section data-markdown>
            - 理解最小问题思想，培养程序员该有的强大的内心
          </section>
                    
          <section data-markdown>
            - mocha的基本用法
            
            ```
            npm install --save-dev mocha
            ```
            
            ```
            https://github.com/mochajs/mocha

            var assert = require("assert")
            
            describe('truth', function(){
              it('should find the truth', function(){
                assert.equal(1, 1);
              })
            })
            ```
          </section>
          
          <section data-markdown>
            - 理解断言
            
            系统Api内置的assert
            
            ```
            https://iojs.org/api/assert.html
            ```

            ![](images/chai.png)
            
            rspec里推荐用expect，其实看个人习惯
          </section>
          
          <section data-markdown>
            - 理解测试生命周期
            
            ```
            describe('Test', function(){
              before(function() {
                // runs before all tests in this block
              })
              after(function(){
                // runs after all tests in this block
              })
              beforeEach(function(){
                // runs before each test in this block
              })
              afterEach(function(){
                // runs after each test in this block
              })
            })
            ```
          </section>
          
          <section data-markdown>
            - 理解done回调
            
            ```
            describe('MongooseDao', function(){
            	before(function(done) {  
                  Top.deleteAll(function(err){
                    if(err){
                      console.log(err);
                    }
                    var files = [];
                    for (var i = 0; i < 100; ++i) {
                      files.push(Top.createAsync({"username":"fixture-user-" + i,"address":"password" + i}));
                    }
                    Promise.all(files).then(function() {
                      done();
                    });
                });
              })
            ```
            
            - 生命周期方法有done
            - 测试方法也有done
          </section>
          
    		  <section>
            <h2>常用测试模块</h2>
  					<p class="fragment">
              1. mocha
            </p>
				 
  				  <p class="fragment">  
              2. chai（Chai is a BDD / TDD assertion library for node and the browser that can be delightfully paired with any javascript testing framework.
            </p>
  				  <p class="fragment">  
              3. sinon（Standalone test spies, stubs and mocks for JavaScript.）
            </p>
  				  <p class="fragment">  
              4. zombie (页面事件模拟Zombie.js is a lightweight framework for testing client-side JavaScript code in a simulated environment. No browser required.)
            </p>
  				  <p class="fragment">  
              5. supertest(接口测试 Super-agent driven library for testing node.js HTTP servers using a fluent API)
            </p>
            
  			  </section>
          
          <section data-markdown>
            ## 反复测试？
            
            CI = Continuous integration 持续集成
            
            - jenkins
            - travis-ci
            
            ```
            教程 https://cnodejs.org/topic/558df089ebf9c92d17e73358
            ```
            
            ![](images/ci.png)
            
            
          </section>
              
          <section data-markdown>
            ## 理解测试覆盖率
            
            ci实际上解决了反复测试的自动化问题。
                  
            但是如何看我的程序里的每一个函数都测试到了呢？
            
            
          </section>
              
          <section data-markdown>
          安装
        
          ```
          $ npm install -g istanbul
          ```
        
          执行

          ```
          $ istanbul cover my-test-script.js -- my test args
          ```
          </section>
            
          <section data-markdown>
          ## 测试报告
            
            
            ```
            ./node_modules/.bin/istanbul cover ./node_modules/mocha/bin/_mocha --report lcovonly
                #MongooseDao()
                  ✓ should return ok when record create
                  ✓ should return ok when record delete fixture-user
                  ...
                  ✓ should return ok when record query


              8 passing (50ms)

            =============================== Coverage summary ===============================
            Statements   : 47.27% ( 26/55 )
            Branches     : 8.33% ( 1/12 )
            Functions    : 60% ( 9/15 )
            Lines        : 47.27% ( 26/55 )
            ================================================================================
            ```
          </section>
          
          <section data-markdown>
            - 理解基于gulp自动化测试方法
            
            ```
            var gulp = require('gulp');
            var watch = require('gulp-watch');
            var path = 'test/**/*.js';

            gulp.task('watch', function() {
              gulp.watch(['test/**/*.js', 'lib/*.js'], ['mocha']);
            });

            var mocha = require('gulp-mocha');
            gulp.task('mocha', function () {
                return gulp.src(path , {read: false})
                    .pipe(mocha({reporter: 'spec'}));
            });

            gulp.task('default',['mocha', 'watch']);
            ```
            
          </section>
          
       
          <section data-markdown>
            ## more
            
 如果有兴趣，可以去了解更多bdd/tdd内容，甚至是cucumber.js,从用户故事开始写测试
          </section>
       
				</section>
        
        
				<section data-transition="slide" data-background="#01bf9d" data-background-transition="zoom">
          <section data-transition="slide" data-background="#01bf9d" data-background-transition="zoom">
  					<h2>Part 5：调试</h2>
 
  					<img src='images/debug.jpg'/>
            
          </section>
         <section data-markdown>
            ## 3种方法

            - node debugger
            - node inspector
            - 测试驱动开发
         </section>
  
          <section data-markdown>
             ## node debugger -1
    
             V8 提供了一个强大的调试器，可以通过 TCP 协议从外部访问。
             
             Nodejs提供了一个内建调试器来帮助开发者调试应用程序。
             
             ```
             var hello = 'hello';
             var world = 'nodejs';

             debugger;

             var hello_world = hello + ' ' + world;
             console.log(hello_world);
             ```
              
          </section>
          <section data-markdown>
             ## node debugger -2
 
             执行命令：
             
             ```
             node debug helloword-debug.js 
             ```
             
             就可以进入调试模式。
          </section>
          
          <section data-markdown>
             ## 全是命令行能习惯么？
             
             ```
             node-debug-tutorial git:(master) ✗ node debug helloword-debug.js
             < debugger listening on port 5858
             connecting... ok
             break in helloword-debug.js:1
               1 var hello = 'hello';
               2 var world = 'nodejs';
               3 
             debug> help
             Commands: run (r), cont (c), next (n), step (s), out (o), backtrace (bt), setBreakpoint (sb), clearBreakpoint (cb),
             watch, unwatch, watchers, repl, restart, kill, list, scripts, breakOnException, breakpoints, version
             debug> 
             debug> n
             break in helloword-debug.js:2
               1 var hello = 'hello';
               2 var world = 'nodejs';
               3 
               4 debugger;
             debug> repl
             Press Ctrl + C to leave debug repl
             > hello
             'hello'
             ```
             
             官方文档
             
             ```
             http://nodejs.org/api/debugger.html
             ```
          </section>
          
          <section data-markdown>
             - node inspector
             
             ```
             https://github.com/node-inspector/node-inspector
             ```
          </section>
          
          <section data-markdown>       
安装

```
npm install -g node-inspector
```

安装完成之后，通常可以直接这样启动在后台：

```
node-inspector &
```

我更喜欢这样用

```
node-debug app.js
```
          </section>
          
          
          <section >
  					<h2>可视化界面</h2>
  					<p>
                <img src='images/inspector-ui.png'/>
  					</p>
             
          </section>
          
          <section data-markdown>
           ## 断点操作

           - resume script execution（F8） 挂起断点，也可以理解为放弃当前断点，如果有下一个断点，会自动断住得
           - step over（F10） 跳过这行，到下一行，如果当前函数结束，会跳到调用栈的上一级的下一行
           - step into（F11） 进入当前行代码里的函数内部
           - step out（Shift + F11） 从当前函数退出到之前进入的代码处
                        
             
          </section>
          
          <section data-markdown>
           ## 总结

           - inspector 足够简单了，功能够用，需要断点的时候用
           - tdd/bdd 平常做业务测试
           
           - 如果想了解更详细的，可以看我写的教程和视频：node-debug 三法三例
           ```
           https://cnodejs.org/topic/5463f6e872f405c829029f7e
           ```
          </section>
          
          
				</section>
        
        <section data-transition="slide" data-background="#1fcf6d" data-background-transition="zoom" >
          
           <section data-transition="slide" data-background="#1fcf6d" data-background-transition="zoom" data-markdown>
          ## 回顾一下
   
          - 了解http协议，尤其是express如何req
          - 了解db相关操作，以mongoose为主
          - 了解Promise/A+规范，合理规避回调陷阱
          - 使用tdd/bdd测试，最小化问题
          - 你无论如何都要会的：调试
          </section>
          <section data-transition="slide" data-background="#1fcf6d" data-background-transition="zoom" >
          <h2>招聘Nodejs工程师, 我亲自带</h2>
          目标全栈
           <p class="fragment">天津，管吃住，工资和北京持平，有机会拿到天津户口，股票期权</p>
           </section>
        </section>
        
				<section data-transition="slide" data-background="#5babe6" data-background-transition="zoom">
					<h2>Q & A</h2>
					<p>
						少抱怨，多思考，未来更美好。有的时候我看的不是你一时的能力，而是你面对世界的态度。
					</p>
          
          <img width="178" height="238" data-src="images/q&a.jpg" alt="Down arrow">
	
          <p class="fragment">console.log('The End, Thanks~')</p>
				</section>
       
       
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