koa学习-测试

mocha 模块是测试框架
chai 模块是用来进行测试结果断言库，比如一个判断 1 + 1 是否等于 2
supertest 模块是http请求测试库，用来请求API接口

单元测试

所需测试demo
const koa = require('koa');
const app = new koa();

const server = async (ctx, next) => {
	let result = {
		success: true,
		data: null
	};
	if (ctx.method === 'GET') {
		if (ctx.url === '/getString.json') {
			result.data = 'this is string data';
		} else if (ctx.url === '/getNumber.json'){
			result.data = 123456;    
		} else {
			result.success = false;
		}
		ctx.body = result;
		next && next();
	} else if (ctx.method === 'POST') {
		if (ctx.url === '/postData.json') {
			result.data = 'ok';
		} else {
			result.success = false;
		}
		ctx.body = result;
		next && next();
	} else {
		ctx.body = 'hello world';
		next && next();
	}
};

app.use(server);

module.exports = app;

app.listen(3004, () => {
	console.log('[demo] test-unit is starting at port 3004')
});

测试代码

const supertest = require('supertest')
const chai = require('chai')
const app = require('./../index')

const expect = chai.expect
const request = supertest( app.listen() )

// 测试套件/组
describe( '开始测试demo的GET请求', ( ) => {

  // 测试用例
  it('测试/getString.json请求', ( done ) => {
	  request
		.get('/getString.json')
		.expect(200)
		.end(( err, res ) => {
			// 断言判断结果是否为object类型
			expect(res.body).to.be.an('object')
			expect(res.body.success).to.be.an('boolean')
			expect(res.body.data).to.be.an('string')
			done()
		})
  })
})

参考文档：
koa-note
koa-jsonp