Substrate is a framework for building upgradable, modular and efficient blockchains. FRAME is a system for building Substrate runtimes. The Substrate Testing project page groups tools that have a positive impact on developer success in the Polkadot Ecosystem.

Unified repositories:

• Chopsticks: Create parallel reality of your Substrate network. Developed by AcalaNetwork in Typescript and Rust.

• Zombienet: A cli tool to easily spawn ephemeral Polkadot/Substrate networks and perform tests against them. Developed by Parity in Rust and Typescript.

• Zombienet SDK: a new SDK for ZombieNet that allow users to build more complex use cases and interact with the network in a more flexible and programatic way. The SDK will provide a set of building blocks that users can combine in order to spawn and interact (test/query/etc) with the network providing a fluent api to craft different topologies and assertions to the running network. Developed by Parity in Rust.