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SurveyJS
Open-Source JSON Form Builder to Create Dynamic Forms Right in Your App. With SurveyJS form UI libraries, you can build and style forms in a fully-integrated drag & drop form builder, render them in your JS app, and store form submission data in any backend, inc. PHP, ASP.NET Core, and Node.js.
It's probably important to note that with Jest, a lot of people are contributing PRs to improve it - The issue is the sole maintainer left maintaining Jest doesn't seem to have the time to approve anything, and appears to be unwilling to allow others to take the reigns and moderate.
With something like react-mock-component, I can test if Bar receives the correct props:
There is ongoing work for a VS Code extension but nothing public yet. You can follow progress on Vitest Discord server in the vscode-ext channel.