Toolkit Overview: RSAT Integration Testing
RSAT (regression suite automation tool) will get a new improvement where our RSAT tool should be able to support an end-to-end integration scenario. It will allow run sessions for third-party applications that run before or after Finance and Supply Chain Management is run. Essentially, you will be able to trigger an integration in some portal and then verify the outcomes in Finance and Supply Chain Management. It's the same as if you were doing with the C# NUnit framework and selenium WebDrivers, although, in this case, you likely won't require coding. The main idea is to be able to do integration scenario testing and be able to do that without developer help. Since development can be expensive it's not something that customers really aim to do. We will get this feature in general availability and in public preview within the next few months, so stay tuned and follow the latest Microsoft improvements so you don't miss out!
Reference: https://companial.com/blog/how-to-automate-integration-testing-in-microsoft-dynamics-365-fscm/