Best way to check whether a certain exception type was the cause (of a cause, etc …) in a nested exception?

Question

I am writing some JUnit tests that verify that an exception of type MyCustomException is thrown. However, this exception is wrapped in other exceptions a number of

Answer 1

Well, I think there's no way to do this without calling getCause(). It you think it's ugly implement a utility class for doing this:

public class ExceptionUtils {
     public static boolean wasCausedBy(Throwable e, Class) {
         // call getCause() until it returns null or finds the exception
     }
}