This article introduces testing for a REST API built with Golang, focusing on unit testing and test-driven development (TDD). It provides step-by-step instructions on setting up the environment, installing dependencies, creating tests for happy paths, and testing edge cases. The code is written in Golang using the Gin framework, and the tests are implemented using the Testify package. The article emphasizes the importance of testing in ensuring the integrity of the application and covers TDD as a testing paradigm. It also provides links to the author's social media profiles for further learning and exploration.