Testing Go Packages with Postgres: Build a CLI User Manager

Writing reliable database tests is one of the most critical skills for modern Go developers. Connecting your application code to a database like Postgres often introduces complexity, flaky tests, and state management issues. This text-only course guides you through the entire process of testing Go packages that interact with PostgreSQL, helping you write clean, maintainable, and reliable test suites. Through structured explanations and clear code examples, you will learn how to design, write, and execute tests for database operations. You will apply these concepts practically by building and testing a command-line user management utility that handles adding, updating, and deleting user data. What you'll learn: - Understand foundational testing concepts in Go, including the standard testing package and basic test execution. - Configure safe database connections and manage test database state with cleanups. - Implement table-driven tests in Go to cover multiple database scenarios efficiently. - Build a functional CLI utility to handle PostgreSQL user data operations. - Apply modern Go testing patterns such as subtests and cleanup helpers to keep your code maintainable. You will start with key terminology and foundational database testing concepts before moving into step-by-step implementation. The course walks you through structuring your Go packages, writing database queries, and verifying your code's behavior against a Postgres instance. This course is designed for beginner Go developers who understand basic syntax and want to learn how to write reliable database-backed tests. No advanced testing experience is required. Start reading today to master Go database testing and build highly reliable applications.