Hands-On Dependency Injection in Go: Develop clean Go code that is easier to read, maintain, and test

Corey Scott

Nov 2018 · Packt Publishing Ltd

About this ebook

Explore various dependency injection methods in Go such as monkey patching, constructor injection, and method injectionKey FeaturesLearn to evaluate Code UX and make it betterExplore SOLID principles and understand how they relate to dependency injectionUse Google's wire framework to simplify dependence managementBook Description

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.

What you will learnUnderstand the benefits of DIExplore SOLID design principles and how they relate to GoAnalyze various dependency injection patterns available in GoLeverage DI to produce high-quality, loosely coupled Go codeRefactor existing Go code to adopt DIDiscover tools to improve your code’s testability and test coverageGenerate and interpret Go dependency graphsWho this book is for

Hands-On Dependency Injection in Go is for programmers with a few year s experience in any language and a basic understanding of Go. If you wish to produce clean, loosely coupled code that is inherently easier to test, this book is for you.

About the author

Corey Scott is a senior software engineer currently living in Melbourne, Australia. He’s been programming professionally since 2000, with the last 5 years spent building large-scale distributed services in Go. An occasional technical speaker and blogger on a variety of software-related topics, he is passionate about designing and building quality software. He believes that software engineering is a craft that should be honed, debated, and continuously improved. He takes a pragmatic, non-zealot approach to coding and is always up for a good debate about software engineering, continuous delivery, testing, or clean coding.