leafwing_input_playback

Input recording and mocking functionality for the Bevy game engine

3 releases (breaking)

0.5.0 Mar 1, 2024
0.4.0 Mar 7, 2023
0.3.0 Nov 13, 2022

#1478 in Game dev

MIT/Apache

56KB
1K SLoC

Rust 877 SLoC // 0.0% comments Rusty Object Notation 282 SLoC

About

An input recording and playback library for the [Bevy] game engine in Rust. Test your games and applications without breaking a sweat. Support Tool Assisted Speedruns (TAS) effortlessly. Make crazy game mechanics where your player's inputs are echoed??

This crate currently captures the following input modes:

  • keyboard
  • mouse
  • gamepad

If you need more, please feel free to file an issue or open a PR!

Getting started

If you're new to this crate, check out the input_playback example to get a good overview of how it all works in practice.

Playback-powered testing

This crate can be used to capture, save to disk, and then play back user inputs in a macro-like fashion. This serialization-based workflow is a natural (if somewhat brittle) fit for testing UI, app logic and gameplay elements of your Bevy apps.

Simply toggle on InputCapturePlugin, set a PlaybackFilePath, perform your inputs and then close the app.

Then, when evaluating tests, loop through each saved input sample, and run your app with the InputPlaybackPlugin, providing a PlaybackFilePath corresponding to the input sample you are testing. AppExit events are also captured, your tests will close down automatically when they're complete.

Dependencies

~37–74MB
~1.5M SLoC