Setting up Rails 5 — Vue.js application testing

Rails 5 has been bundled with webpacker gem which offers great support for integrating popular JavaScript Frameworks (e.g. Vue, React Angular and Elm) for building Single-page application (SPA) front-end. Nevertheless, JavaScript testing facility…


I meet Visitor pattern

My first encounter with Visitor pattern dated back 8 years ago when I was working on Resource Map and we needed to give our users the ability to update and retrieve data via text SMS through the platform.


Rolling your own testing framework with Java Assertions

A few years back I gave a talk and demo about doing test-driven development at DevCamp organized by a group of like-minded and passionate software developers, who wish to bridge the gap between college education and industrial…


Install Munin 2.0.x on Ubuntu 12.04

Ubuntu 12.04 is still one of the most popular linux distros with LTS term, yet it is packaged with a very outdated munin 1.4.6 binary distribution.

Munin is a networked resource monitoring tool that can help analyze resource trends and “what…