Full Introduction to Golang with Test-Driven Development

The article introduces a tutorial series on learning Go (Golang) through Test-Driven Development (TDD). It begins with creating a "Hello, World!" program, emphasizing the TDD cycle, which includes adding a test, running tests, writing code to pass the tests, and refactoring. The author suggests creating a project folder named "go-sandbox" for experimentation and explains the importance of the "go.mod" file for module management in Go projects.

The tutorial outlines the steps to create a package called "helloworld" and a Go file named "helloworld.go" where the function "HelloWorld" will be defined. This function is intended to return the string "Hello, World!". The article stresses the need to write a test for this function in a separate file named "helloworld_test.go".

The test function, "TestHelloWorld", will check if the output of "HelloWorld" matches the expected string. The author explains variable declaration and assignment in Go, using a short variable declaration for storing the function's output. An if statement is introduced to compare the actual output with the expected output, and the article concludes with a brief mention of using Go's testing framework to report test results. This structured approach aims to facilitate learning Go while reinforcing programming concepts through practical application.