By using undertow for one part of tests, we also gain benefit that we could keep improving our resteasy-undertow adapter.
Currently we have three main adapters:
- undertow adapter
- netty adapter
- sun jdk adapter
The undertow adapter is fully covered by JBoss community. Considering the current popularity of JBoss Swarm, I feel that these lightweight and modular solution will be more and more popular.
(Just some personal views)