A brief introduction to the testing framework Mocha under NodeJs

$ cd DemoOfMocha
$ npm install

exports.sum =function (a,b) {
 return a+b
}

//test/lib/sum.js

var sum = require('../../lib/sum')
var assert = require('assert')

describe('和函数的测试',function () {
 it('1加1应该等于2',function () {
 var expect=10;
 assert.equal(sum(1,1),expect);
 })
})

assert.fail(actual, expected, message, operator)

assert.ok(value, [message])

assert.equal(actual, expected, [message])

assert.notEqual(actual, expected, [message])

assert.deepEqual(actual, expected, [message])

assert.notDeepEqual(actual, expected, [message])

assert.strictEqual(actual, expected, [message])

assert.notStrictEqual(actual, expected, [message])

assert.throws(block, [error], [message])

{
 "name": "DemoOfMocha",
 "version": "1.0.0",
 "description": "demo of mocha",
 "main": "index.js",
 "directories": {
 "test": "test"
 },
 "dependencies": {},
 "devDependencies": {},
 "scripts": {
 "test": "NODE_ENV=test mocha test/**/*.js"
 },
 "keywords": [
 "deom",
 "mocha"
 ],
 "author": "wjszxli",
 "license": "ISC"
}

$ npm install mocha --save-dev

$ npm test

$ npm install --save-dev mochawesome

 "name": "DemoOfMocha",
 "version": "1.0.0",
 "description": "demo of mocha",
 "main": "index.js",
 "directories": {
 "test": "test"
 },
 "dependencies": {},
 "devDependencies": {
 "mocha": "^3.2.0",
 "mochawesome": "^2.0.4"
 },
 "scripts": {
 "test": "NODE_ENV=test mocha test/**/*.js --reporter mochawesome"
 },
 "keywords": [
 "deom",
 "mocha"
 ],
 "author": "wjszxli",
 "license": "ISC”
}

"scripts": {
 "test": "NODE_ENV=test mocha -t 3000 timeout test/**/*.js --reporter mochawesome”
},

//test/lib/timeout.js


var assert = require('assert')

describe('测试应该3000毫秒后结束',function () {
 it('测试应该3000毫秒后结束',function (over) {
 var a=false;
 var b = function () {
  a=true;
  assert.ok(a);
  over();
 };
 setTimeout(b,2500);
 })
})

var express = require('express')
var app = express();

app.get('/api/test',function (req,res) {
 res.send({})
})

var port = process.env.PORT || 3000

if (process.env.NODE_ENV !== 'test') {
 app.listen(port);
 console.log('start from http://www.php.cn/:' + port)
} else {
 module.exports = app;
}

//test/lib/async.js

var http = require('http')
var assert = require('assert')
var request = require('superagent');

describe("测试异步请求",function () {
 it("测试异步请求返回一个对象",function (next) {
 request
  .get('http://localhost:3000/api/test')
  .end(function(err, res){
  //expect(res).to.be.an('object');
  console.log(res.body);
  assert.deepEqual(res.body,Object)
  next();
  });
 })
})

//test/lib/promise.js

var fetch = require('node-fetch');
var http = require('http')
var assert = require('assert')

describe('Promise 异步测试',function () {
 it('异步Promise返回一个对象',function () {
 return fetch('http://localhost:3000/api/test')
  .then(function(res) {
  return res.json();
  }).then(function(json) {
  console.log(json)
  assert.deepEqual(json,{});
  });
 })
})

describe('hooks', function() { 
 before(function() { 
 // 在当前区块的所有测试用例之前执行 
 }); 
 after(function() { 
 // 在当前区块的所有测试用例之后执行 
 }); 
 beforeEach(function() { 
 // 在当前区块的每个测试用例之前执行 
 }); 
 afterEach(function() { 
 // 在当前区块的每个测试用例之后执行 
 }); 
 //测试用例 
});

//test/lib/hooks.js
var assert = require('assert')

describe('hook示例', function() {
 var foo = false;

 beforeEach(function() {
 foo = true;
 });

 it('修改foo要成功', function() {
 assert.ok(foo)
 });
});

//test/lib/only.js

var sum = require('../../lib/sum')
var assert = require('assert')

describe('和函数的测试',function () {
 it('1加2应该等于3',function () {
 var expect=3;
 assert.equal(sum(1,2),expect);
 })

 it.only('3加4应该等于7',function () {
 var expect=7;
 assert.equal(sum(3,4),expect);
 })
})

//test/lib/only.js

var sum = require('../../lib/sum')
var assert = require('assert')

describe('和函数的测试',function () {
 it('5加6应该等于11',function () {
 var expect=11;
 assert.equal(sum(5,6),expect);
 })

 it.skip('7加8应该等于15',function () {
 var expect=15;
 assert.equal(sum(7,8),expect);
 })
})