Unit Testing in Go - A Beginner's Guide

Go's testing approach is deliberately minimal, using regular Go code and the standard library's testing package. Tests live in files ending with `_test.go`, with functions starting with `Test` that take `*testing.T`. The guide covers writing basic tests, running them with `go test`, using table-driven tests for multiple cases, handling error returns, and checking for panics. Key patterns include using `t.Errorf` for failures, `t.Run` for subtests, and organizing test cases in struct slices. Best practices emphasize clear naming, focused tests, explicit error checking, and frequent test runs.