maxbrunsfeld/counterfeiter

Health v2 · maintenance only

Adoption not part of the score

1140 stars · 101 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

counterfeiter is a Go code generation tool that creates self-contained, type-safe fake implementations (test doubles) of interfaces. It integrates with go generate to keep generated fakes in sync with interface definitions.

Use cases

• generate fake implementations of Go interfaces for unit tests
• create type-safe test doubles without writing them by hand
• keep generated mocks up to date with go generate
• mock collaborators when unit testing Go objects
• generate fakes for interfaces in a Go module

When to choose

• you write Go unit tests and need fakes for interface dependencies
• you want type-safe, compile-time-checked mocks rather than runtime reflection mocks
• you prefer generated code committed to your repo via go generate

When to avoid

• you need dynamic runtime mocking without code generation
• your project is not using Go modules
• you prefer hand-written or behavior-driven mock libraries

Facets

cli-tool · maturity active

testing mocking cli testing developer-tools cli go cross-platform test-doubles fakes go-generate type-safe unit-testing code-generation go

Member repositories

For agents

markdown · JSON · MCP: product_card(name="maxbrunsfeld/counterfeiter")