Last week I posted an article on using Postman for testing the Plug-In Unit, but then got to thinking, if you're not already using Postman, there is a learning curve before you can apply this in your daily work, and maybe you only want to use Postman for your current project.
So, I decided to wrap up a simple page to do the testing og the Plug-In Unit inside Business Central. It allows you to enter the request XML for e.g. a price look-up, send it to the Plug-In Unit and review the response XML, and also to do debugging of your extension in Visual Studio Code. The only thing missing here compared to the full live integration experience is the HTTP transport.
I included links in the documentation to the live integration requests and the NAV / Business Central batch request.
You can include this in your project or deploy it as is.
Suggestions are more than welcome :-)