Lightweight configurable multithreaded fake SMTP server. Mimic any SMTP behaviour for your test environment
Dynamically generate self-signed certificates and certificate authorities within your test functions
A JavaScript mock Date object that can be used to change when "now" is.
In-memory file-system with Node's fs API.
Email sandbox for testing and transactional API for production sending
A fast data generator that produces CSV files from generated relational data
integration testing with real dependencies (database, cache, even Kubernetes or AWS) running in Docker, without mocks
MockServer - Lightweight Go-based mock API server for fast prototyping, testing, and simulating REST
End-to-end evaluation and observability platform, helping teams ship their AI agents reliably and 5x faster
Basic Assertion Library used along side native go testing, with building blocks for custom assertions
Fuzzing framework for Solana smart contracts with manually-guided testing, flow-based sequences, and property-based validation
Browser automation and testing via accessibility tree