docs(hackernews): upgrade to egg2.x (#48)

Author: SunShinewyf

hackernews/README.md

@@ -1,8 +1,8 @@
-# egg-example-hackernews-async
+## About this example
+This example is a [quickstart](https://eggjs.org/zh-cn/intro/quickstart.html) of Egg, it includes the basic and comprehensive usages of Egg such as Controller, Service and some 
+simple configurations, moreover, it has the corresponding unit tests. you can follow this simple example and build your Egg application step by step.
 
-[Hacker News](https://news.ycombinator.com/) showcase using async/await for egg
-
-## QuickStart
+## How to run it locally
 
 ### Development
 ```shell
@@ -27,11 +27,10 @@ $ EGG_SERVER_ENV=prod npm start
 
 ### Requirement
 
-Please ensure your node version is `>=7.6.0` for async await support without flag. If your node version is `>=7.0.0 < 7.6.0`, you can run npm scripts with harmony flag
+Please ensure your node version is `>=8.0` for Egg2.x.
 
-```shell
-# start server
-npm run dev -- --harmony-async-await
-# run test cases
-npm run test-local -- --harmony-async-await
-```
+
+## some problems you might encounter
+- lack of MVC model development experience, click [here](https://www.zhihu.com/question/27897315) to learn more
+- some concepts such as middleware, extend, helper are difficult to understand, see related [docs](https://eggjs.org/) to know more
+- encounter some errors during development, find [issues](https://github.com/eggjs/egg/issues) to check if some solutions have been provided

hackernews/app/router.js

@@ -1,8 +1,9 @@
 'use strict';
 
 module.exports = app => {
+  const { router, controller } = app;
   app.redirect('/', '/news');
-  app.router.get('/news', 'news.list');
-  app.router.get('/news/item/:id', 'news.detail');
-  app.router.get('/news/user/:id', 'news.user');
+  router.get('/news', controller.news.list);
+  router.get('/news/item/:id', controller.news.detail);
+  router.get('/news/user/:id', controller.news.user);
 };

hackernews/package.json

@@ -4,14 +4,18 @@
   "description": "hackernews showcase using async/await for egg",
   "private": true,
   "dependencies": {
-    "egg": "^1.10.1",
+    "egg": "^2.0.0",
     "egg-view-nunjucks": "^2.1.4",
-    "moment": "^2.19.1"
+    "moment": "^2.19.2"
   },
   "devDependencies": {
+    "autod": "^3.0.1",
+    "autod-egg": "^1.0.0",
     "cheerio": "^1.0.0-rc.2",
     "egg-bin": "^4.3.5",
-    "egg-mock": "^3.13.1"
+    "egg-mock": "^3.13.1",
+    "eslint": "^4.12.0",
+    "eslint-config-egg": "^5.1.1"
   },
   "engines": {
     "node": ">=8.9.0"

hackernews/test/app/controller/news.test.js

@@ -1,20 +1,19 @@
 'use strict';
 
 
-const mm = require('egg-mock');
-const assert = require('assert');
 const cheerio = require('cheerio');
+const { mock, assert } = require('egg-mock/bootstrap');
 
 describe('test/app/controller/news.test.js', () => {
   let app;
   before(async () => {
-    app = mm.app();
+    app = mock.app();
     await app.ready();
   });
 
   after(() => app.close());
 
-  afterEach(mm.restore);
+  afterEach(mock.restore);
 
   it('should GET /news', async () => {
     const result = await app.httpRequest().get('/news').expect(200);

hackernews/test/app/service/HackerNews.test.js

@@ -1,20 +1,19 @@
 'use strict';
 
-const assert = require('assert');
-const mm = require('egg-mock');
+const { mock, assert } = require('egg-mock/bootstrap');
 
 describe('test/app/service/HackerNews.test.js', () => {
   let app;
   let ctx;
 
   before(async () => {
-    app = mm.app();
+    app = mock.app();
     await app.ready();
     ctx = app.mockContext();
   });
 
   after(() => app.close());
-  afterEach(mm.restore);
+  afterEach(mock.restore);
 
   it('getTopStories', async () => {
     const list = await ctx.service.hackerNews.getTopStories();