A toolkit with common assertions and mocks that plays nicely with the standard library
- testify
- go
- assertions
- mocking
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GoReplay is an open-source tool for capturing and replaying live HTTP traffic into a test environment in order to continuously test your system with real data. It can be used to increase confidence in code deployments, configuration changes and infrastructure changes.
An email and SMTP testing tool with API for developers
- email-testing
- go
- golang
- smtp-server
Go testing in the browser. Integrates with `go test`. Write behavioral tests in Go.
- testing-tools
- tdd-utilities
- bdd-framework
- go
A contract-driven gRPC regression harness for AI coding agents, with human-approved baselines. Snapshot the valid call chains of an API so an agent can look one up instead of tracing for it. gRPC today, OpenAPI next
Test your code without writing mocks with ephemeral Docker containers 📦 Setup popular services with just a couple lines of code ⏱️ No bash, no yaml, only code 💻
- go
- golang
- testing
- integration-testing
A reasonably complete and well-tested golang port of httpbin, with zero dependencies outside the go stdlib.
Enrich `go test` outputs with text decorations.
- enrich-outputs
- golang-wrapper
- test
- go
Fake server, Consumer Driven Contracts and help with testing performance from one configuration file with zero system dependencies and no coding whatsoever
k6 extension to load test Apache Kafka with support for various serialization formats, SASL, TLS, compression, Schema Registry client and beyond
Run performance tests in Kubernetes cluster with Kangal
- kangal
- open-source
- wiz-foundations-release-engineering
SMTP mock server written on Golang. Mimic any 📤 SMTP server behavior for your test environment with fake SMTP server.
- smtp
- smtp-mock
- smtp-server
- smtp-mail
Content discovery and fuzzing with HTTP/3 support (100k requests per second)
Client extension for interacting with Kubernetes clusters from your k6 tests.
- xk6
- kubernetes
- kubernetes-client
- k6
:exclamation:Basic Assertion Library used along side native go testing, with building blocks for custom assertions
A lightweight Snowflake emulator built with Go and DuckDB for local development and testing
High-performance TUI framework for Go with DDD + Rich model inspired architecture, perfect Unicode, and Elm-inspired design. Modern alternative to Bubbletea/Lipgloss.
- bubbles
- bubbletea
- cli
- command-line
Client extension for interacting with a host over SSH as part of your k6 test.
Feature-rich filesystem mocking for Go tests: comprehensive error injection, latency simulation, write operations, operation statistics, and standalone file handles. Built on testing/fstest.MapFS with comprehensive fs.FS interface support.
- filesystem
- go
- golang
- mock
Framework-agnostic evaluation harness for Go — test your MCP servers and AI agents with scored, CI-ready checks.
A simple and efficient load testing tool for Web APIs built with Go.