The client testsuite uses ad-hoc embedded servers. This is not ideal for the following reasons:

• it does not test the actual server, which initializes components in a specific way
• it cannot be used against different server versions
• it cannot be used with different JDK versions
• servers are started and stopped many times
• some of the tests are limited by the presence of dummy implementations (e.g. security)

While there is a subset of tests which use a white-box approach, manipulating the internals of the servers (via ControlledTimeServices, injecting failures, etc), most of the client testsuite can be migrated to the server testsuite.