Wouldn’t it be great if we could write tests for our Go CLI tools that are simple as shell scripts? The testscript package lets us do exactly that. Let’s take it for a spin.

Mailpit is a free, open-source SMTP testing tool built with Go and Vue. It provides a modern web UI for viewing and testing emails, and includes a REST API for integration testing.

This article will cover everything you need to know about Go testing. You will start with a simple testing function, and work through more tools and strategies to help you master testing in Go.