Debugging Java/Scala works really nice in IntelliJ. It also has support for asynchronous stack traces which means to say that stack traces are carried over asyn

Debugging Java/Scala works really nice in IntelliJ. It also has support for asynchronous stack traces which means to say that stack traces are carried over asynchronous boundaries. It even works for callbacks. Edit: Having said this, I still rely more on creating test cases to capture what I think should happen instead of stepping through the code in a white box way.