Unit testing is an extremely important practice. It helps developers avoid bugs easily and lets you know when something is broken immediately. … There are numerous libraries that exist for unit testing in JavaScript, including Jest and Mocha; however, they aren’t necessarily well-adapted to run under the Google Apps Script environment. … For that reason, I built my own library with Google Apps Script in mind.
We’ve featured a couple of community contributions around Google Apps Script Unit Testing and if this is a topic that interests you then the related posts section below will link to additional resources. This post from Dmitry Kostyuk is a great addition and the accompanying
UnitTestingApp
library that is shared in the post has some very useful Google Apps Script related features such as a dedicated method to check your data is a 2D array (particularly useful in the context of handling spreadsheet values). Follow the source link for more details…
Source: Taking Away the Pain from Unit Testing in Google Apps Script
Member of Google Developers Experts Program for Google Workspace (Google Apps Script) and interested in supporting Google Workspace Devs.