Book Image

Hands-On Dependency Injection in Go

By : Corey Scott
Book Image

Hands-On Dependency Injection in Go

By: Corey Scott

Overview of this book

Hands-On Dependency Injection in Go takes you on a journey, teaching you about refactoring existing code to adopt dependency injection (DI) using various methods available in Go. Of the six methods introduced in this book, some are conventional, such as constructor or method injection, and some unconventional, such as just-in-time or config injection. Each method is explained in detail, focusing on their strengths and weaknesses, and is followed with a step-by-step example of how to apply it. With plenty of examples, you will learn how to leverage DI to transform code into something simple and flexible. You will also discover how to generate and leverage the dependency graph to spot and eliminate issues. Throughout the book, you will learn to leverage DI in combination with test stubs and mocks to test otherwise tricky or impossible scenarios. Hands-On Dependency Injection in Go takes a pragmatic approach and focuses heavily on the code, user experience, and how to achieve long-term benefits through incremental changes. By the end of this book, you will have produced clean code that’s easy to test.
Table of Contents (15 chapters)

Who this book is for

This book is designed for developers who wish that their code was easy to read, test, and maintain. It is intended for developers coming from an object-oriented background who want to get more out of Go, as well as for developers who believe that quality code is about more than delivering one particular feature.

After all, writing code is easy. Similarly, getting a single test case to pass is simple. Creating code whose tests continue to pass after months or years of adding additional features is heading toward the impossible.

For us to be able to deliver code at that level consistently, we require a lot of nifty tricks. This book hopes to not only equip you with those tricks, but also to give you the wisdom to apply them effectively.