I'm a new plugin developer and I've already gone through the custom language tutorial here and the related testing tutorial here.
I have checked out the source code from https://github.com/JetBrains/intellij-community.git and am sifting through the source code trying to determine how IntelliJ IDEA's refactoring engine works (my end goal is to make a plugin that applies custom code changes and refactorings).
However, I do not see a test sources root in the working directory. If I try to switch configurations, the only testing one available is "Dart tests."
Where can I find the tests that test the actual IntelliJ IDEA source code?