Wadis

Wadis is a WebAssembly build of the Redis in-memory datastore, purpose-built for automated testing. It provides a high-fidelity, ephemeral Redis server that runs in-process with your tests, eliminating the need for Docker or external binaries. Version 1.0.2 is the latest stable release, with active development; it ships TypeScript types and supports Node.js >=20 and Bun >=1.1. Key differentiators include instant boot (milliseconds), zero state collision between instances, and support for advanced Redis features like Pub/Sub and Lua scripting. It offers an ioredis-compatible client API and a low-level server API for raw RESP access.