Similarly class Infrastructure could be reused over all JDK's tests. But personnally I would prefer to more and more use the JUnit framework. Is there already an existing example?
There's good news on this front. We are in the process of making TestNG a supported test framework for writing unit and regression tests in OpenJDK. TestNG inherits a lot of ideas from JUnit, so JUnit users should find it easy to use, and there are plugins for all the big IDEs.
The goal you state -- making it easier to reuse test infrastructure -- is one of the reasons why we want to do this. Another is that many people are already familiar / comfortable with this style of testing, and therefore are more likely to contribute good tests.
I don't have a schedule for when this will be supported within the OpenJDK build and test process, but we're working on it.
