To make sure that we trigger transactional event listeners from Scenario based integration tests, we trigger stimulus executions using transactions configured to require a new transaction. This makes sure that Scenarios work in integration tests using @Transactional, of course circumventing the default rollback behavior of those transactions. There's no other way to implement this as we *need* to commit a transaction to trigger the delivery of transaction-bound events.
Fixed a bug in the handling of Scenario.stimulus(Supplier<T>) as for this, the Supplier handed into the method had not been executed transactionally at all.
ce264aaf96