Designing and Testing Hexagonal Architecture in Go

As Go applications grow, tightly coupled code often makes testing and introducing new features a slow, painful process. Transitioning to a clean, decoupled architecture is the key to maintaining a fast, reliable codebase. In this text-based course, you will learn how to structure Go applications using Hexagonal Architecture, also known as Ports and Adapters. You will discover how to isolate your core business logic from external dependencies like databases, web frameworks, and APIs, allowing you to write clean, highly testable code that adapts easily to change. What you'll learn: - Understand the core concepts of Hexagonal Architecture, including domain models, ports, and adapters. - Define explicit interfaces in Go to decouple business logic from external infrastructure. - Implement robust unit tests for your core domain using modern Go testing techniques and mock implementations. - Connect your application to real-world services like databases and HTTP servers using adapters. - Handle application configuration and dependency injection cleanly using modern Go practices. - Apply event-driven design principles to scale your application's communication. You will begin by mastering foundational architectural definitions and core terminology. From there, you will step through defining ports, building adapters, and writing clean, mock-based tests to verify your business logic in isolation. This course is designed for software developers and Go beginners who want to move beyond basic scripts and learn how to design production-ready, testable applications. No advanced architectural experience is required. Start reading today to build cleaner, more adaptable Go applications.