Book Image

Learning Go Programming

Book Image

Learning Go Programming

Overview of this book

The Go programming language has firmly established itself as a favorite for building complex and scalable system applications. Go offers a direct and practical approach to programming that let programmers write correct and predictable code using concurrency idioms and a full-featured standard library. This is a step-by-step, practical guide full of real world examples to help you get started with Go in no time at all. We start off by understanding the fundamentals of Go, followed by a detailed description of the Go data types, program structures and Maps. After this, you learn how to use Go concurrency idioms to avoid pitfalls and create programs that are exact in expected behavior. Next, you will be familiarized with the tools and libraries that are available in Go for writing and exercising tests, benchmarking, and code coverage. Finally, you will be able to utilize some of the most important features of GO such as, Network Programming and OS integration to build efficient applications. All the concepts are explained in a crisp and concise manner and by the end of this book; you would be able to create highly efficient programs that you can deploy over cloud.
Table of Contents (18 chapters)
Learning Go Programming
About the Author
About the Reviewers

The Go test tool

Prior to writing any test code, let's take a detour to discuss the tooling for automated testing in Go. Similar to the go build command, the go test command is designed to compile and exercise test source files in specified packages, as illustrated in the following command:

$> go test .

The previous command will exercise all test functions in the current package. Although it appears to be simple, the previous command accomplishes several complex steps, including:

  • The compilation of all test files found in the current package

  • Generating an instrumented binary from the test file

  • Executing the test functions in the code

When the go test command targets multiple packages, the test tool generates multiple test binaries that are executed and tested independently, as shown in the following:

$> go test ./... 

Test file names

The test command uses the import path standard (see Chapter 6, Go Packages and Programs) to specify which packages to test. Within a specified package, the...