This repository contains a small sample project for the VSCode Migrate extension for VSCode.
The project contains sample files for multiple migrations. Some of the matches a covered by Unit Tests written with Jest, some are not.
A trivial example that uses regular expressions to find matches. It replaces inward triple chevrons with outward triple chevrons.
A more complex example that uses ts-morph to migrate for a real world breaking change. The breaking change was introduced in JQuery 3 to make JQuery deferreds compatible with ES6 native promises. In JQuery 3 a failure callback that returns a non-promise value will result in the deferred being resolved, while in JQuery 2 the deferred stayed rejected. The migration will pass all non-promise values returned from failure callbacks through the factory method for a rejected deferred. This way the deferred will stay rejected in both versions.
Install VSCode Migrate, and NodeJS, clone this repo and run npm i. Use the extension like described here. You can play around with this project however you like. If you want to return the src directory to its original state, run npm run reset, but be aware that this will only reset the files, not any commits performed by the extension.