Unit testing is the most important thing in developing an application, which aims to minimize the occurrence of errors, therefore software developers are obliged to master it. In this article, we will write unit tests in the Golang programming language using the unit testing package provided by Golang.

Let’s get started!

The calculator application is a simple application that is always available on every device such as android, ios, and desktops. In this article we will build a calculator application using React Native and Expo, why do we use React Native and Expo?

React Native is a JavaScript-based framework that is used to develop mobile applications on two operating systems simultaneously, namely Android and iOS. React Native itself was first launched in 2015 by Facebook and is open source.

You can find out more information about React Native here

Expo itself is a set of tools, libraries, and services that are used to simplify the code of React Native apps. So you can run React Native apps on the Expo emulator.

You can find out more information about Expo here.

maybe that’s enough about the introduction of React Native and Expo. Before we start making a calculator application, first install node js, react native, and expo on your computer.