Net Speed with speedtest.net

netSpeed.ts

import * as fs from 'fs';
import { EventEmitter } from 'events';
const speedTest = require('speedtest-net');

var wrap = (callback: Function) => {
    try {
        callback();
    } catch (error) {
        console.log(error);
    }
};

(() => {
    wrap(async ()=> {
        let data = await startTest();
        console.log(`We got the data is \n ${data} \n END!`);
    });
})();

function startTest() {
    let config = {
        maxTime: 2500,
        serverId: 2133
    }
    let a: EventEmitter = speedTest(config)
    return new Promise((res, rej) => {
        a.on('downloadprogress', progress => {
            console.log(progress);
        });
        a.on('config', config => {
            fs.writeFile('./netConfig', JSON.stringify(config));
        })
        a.on('done', dataOverLoad => {
            fs.writeFile('./config', JSON.stringify(dataOverLoad));
            res(dataOverLoad);
        });
        a.on('error', err=>{
            rej(err);
        });
    });
}