Test Doubles in Go Without a Mocking Framework: 4 Patterns

Book: Hexagonal Architecture in Go Also by me: Thinking in Go (2-book series) — Complete Guide to Go Programming + Hexagonal Architecture in Go My project: Hermes IDE | GitHub — an IDE for developers who ship with Claude Code and other AI coding tools Me: xgabriel.com | GitHub You sit down to write the first test for a new Go service. Reflex kicks in. You reach for mockgen , or mockery , or testify/mock . You wire up a code generator behind a //go:generate line and commit a mocks/ directory. Thr