failpoint
A Go library for injecting controlled failures into code for testing error handling and fault tolerance.
What is failpoint?
Failpoint is a Go implementation of the failpoint concept, enabling developers to inject controlled failures—such as errors, panics, delays, or custom behaviors—at specific points in their code. It allows for reproducible testing of error handling, fault tolerance, and edge cases by activating these injection points via environment variables or programmatic control. The tool is designed to be minimally invasive, with zero runtime overhead in production, as the failpoint code is removed from final binaries when disabled.
Go developers and engineers building distributed systems, databases, or any application requiring robust fault tolerance and error handling testing. It is particularly useful for teams implementing chaos engineering practices or needing to simulate failure scenarios in a controlled manner.
Developers choose failpoint over alternatives because it offers zero runtime cost in production, as failpoint code is completely removed from binaries when disabled. Its compiler-checked syntax ensures reliability by catching errors during compilation, and it maintains original line numbers in rewritten code for easier debugging, unlike comment-based or runtime-heavy approaches.
Overview
An implementation of failpoints for Golang.
Use Cases
Best For
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