Author Kelvin Omereshone

March 2, 2021 — With mobile traffic accounting for over 50% of web traffic these days, leaving your mobile performance unoptimized isn’t really an option. In this article, we’ll discuss the complexity and challenges of mobile, and how mobile testing tools can help us with just that. Read more…

January 8, 2021 — GetX is an extra lightweight solution for state, navigation, and dependencies management for Flutter applications. Flutter is one of the fastest ways to build truly cross-platform native applications. It provides features allowing the developer to build a truly beautiful UI experience for their users, and in this article, Kelvin Omereshone will be looking at GetX’s benefits, features, and how to start using it in Flutter applications. Read more…

November 24, 2020 — The Vue Testing library can help you to test your applications by mirroring the way that a user would interact with them. Here’s everything you need to know if you want to get started right away. In this article, Kelvin Omereshone will look at testing Vue applications using the Vue Testing Library — a lightweight library that emphasizes testing your front-end application from the user’s perspective. Read more…

October 16, 2020 — Ever had to switch your focus from your editor and to your terminal to see the results of your tests? This article will introduce you to Wallaby.js — a JavaScript productivity tool that supercharges your IDE by allowing you to get real-time feedback on your JavaScript tests in your code editor even before saving the file. You will also learn how to use Wallaby.js for testing React applications.

Note: In order to be able to follow along, you’ll need to be familiar with JavaScript testing and have a working knowledge of building React applications. Read more…

September 7, 2020 — Postman allows you to manually test your APIs in both its desktop and web-based applications. However, it also has the ability for you to automate these tests by writing JavaScript assertions on your API endpoints. In this article, Kelvin Omereshone will learn how to write automated tests on web APIs with Postman. In order to follow along to this tutorial, you’ll need at least a fair amount of familiarity with Postman. Read more…

August 10, 2020 — You can get by in NodeJS without properly handling errors but due to the asynchronous nature of NodeJS, improper handling or errors can cause you pain soon enough. This article is for JavaScript and NodeJS developers who want to improve error-handling in their applications. Kelvin Omereshone explains the error class pattern and how to use it for a better, more efficient way of handling errors across your applications. Read more…

July 20, 2020 — In this article, Kelvin Omereshone is going to be looking at how to use Chakra UI and NuxtJS in building accessible front-end applications. In order to follow along, you should be familiar with using the progressive front-end framework Vue.js with Nuxt. If not, see the Vue.js and NuxtJS docs to get started. In order to make the web more accessible, there are a couple of best practices and standards that you will have to implement in your applications. Learning to implement these standards can seem like a daunting task when you factor in project deadlines and other constraints that you have to work with as a developer. Read more…

July 8, 2020 — Tauri is a toolchain for creating small, fast, and secure desktop apps from your existing HTML, CSS, and JavaScript. In this article, Kelvin explains how Tauri plays well with the progressive framework Vue.js by integrating both technologies in bundling an example web app called nota as a native application. Read more…

June 17, 2020 — UI or User Interface test is a form of acceptance testing done to verify the user flows of your front-end application. The emphasis of these kinds of software tests is on the end-user that is the actual person who will be interacting with your web application on a variety of devices ranging from desktops, laptops to mobile devices. In this final part of Mirage JS Deep Dive series, Kelvin Omereshone will be putting everything you’ve learned in the past series into learning how to perform UI tests with Mirage JS. Read more…

June 10, 2020 — So far, we have seen how we can create records with Mirage, intercept API requests via route handlers and, last but not least, how the shape of the data returned to us from Mirage is affected. In this third part of Mirage JS Deep Dive series, Kelvin Omereshone will be focusing on using response, timing and passthrough in Mirage for a better handle on simulating an actual backend server. However, before you begin reading this article, please read the introduction to MirageJS first as well as Part 1 and Part 2 of this series. Read more…

May 29, 2020 — Factories are a faster way to create new database records., A fixture is a state of a set or collection of objects that serve as a baseline for running tests, and a serializer is responsible for transforming the response. In this second part of the Mirage JS Deep Dive series, Kelvin Omereshone will be looking at Mirage JS’ Factories, Fixtures, and Serializers. You’ll see how they enable rapid API mocking using Mirage. Read more…

May 21, 2020 — In this article, Kelvin Omereshone introduces you to machines, an open standard for JavaScript functions. At the end of this article, you should be familiar with what machines are and how to implement them. There is no special prerequisite for this article. If you can write a JavaScript function, then you’ll be able to follow along. With all that said, let’s dive in. Read more…

April 30, 2020 — Mirage JS borrowed some terms and concepts which are very much familiar to back-end developers, however, since the library would be used mostly by front-end teams, it’s appropriate to learn what these terms and concepts are. In this first part of the Mirage JS Deep Dive series, Kelvin Omereshone will be looking at Mirage JS models and associations. He’ll take a closer look at what they are and the roles they play in crafting out production-ready frontend without an actual backend with Mirage JS. Read more…

February 13, 2020 — Almost all JavaScript projects that can be found out in the wild interact with a web service or API and either use it for authentications or getting user-related data. In this article, Kelvin Omereshone introduces Mirage JS, an API mocking library that lets you build, test and share a complete working JavaScript application without having to rely on any backend API or services. You’ll also learn how to set up Mirage JS with the progressive front-end framework, Vue.js. Read more…