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

You can do this using guava:

FluentIterable.from(Throwables.getCausalChain(e))
                        .filter(Predicates.instanceOf(ConstraintViolationException.class))
                        .first()
                        .isPresent();