Book Image

Mastering Go – Third Edition - Third Edition

By : Mihalis Tsoukalos
5 (2)
Book Image

Mastering Go – Third Edition - Third Edition

5 (2)
By: Mihalis Tsoukalos

Overview of this book

Mastering Go is the essential guide to putting Go to work on real production systems. This freshly updated third edition includes topics like creating RESTful servers and clients, understanding Go generics, and developing gRPC servers and clients. Mastering Go was written for programmers who want to explore the capabilities of Go in practice. As you work your way through the chapters, you’ll gain confidence and a deep understanding of advanced Go concepts, including concurrency and the operation of the Go Garbage Collector, using Go with Docker, writing powerful command-line utilities, working with JavaScript Object Notation (JSON) data, and interacting with databases. You’ll also improve your understanding of Go internals to optimize Go code and use data types and data structures in new and unexpected ways. This essential Go programming book will also take you through the nuances and idioms of Go with exercises and resources to fully embed your newly acquired knowledge. With the help of Mastering Go, you’ll become an expert Go programmer by building Go systems and implementing advanced Go techniques in your projects.
Table of Contents (17 chapters)
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Testing an HTTP server with a database backend

An HTTP server is a different kind of animal because it should already run for tests to get executed. Thankfully, the net/http/httptest package can help—you do not need to run the HTTP server on your own as the net/http/httptest package does the work for you, but you need to have the database server up and running. We are going to test the REST API server we have developed in Chapter 10, Working with REST APIs—we are going to copy the server_test.go file with the test code in the GitHub repository of the server.

To create server_test.go, we do not have to change the implementation of the REST API server.

The code of server_test.go, which holds the test functions for the HTTP service, is the following:

package main
import (