Appstats In Unit Tests (Java)

I'm using JUnit for our Google AppEngine application unit testing. Is there some way I can get the equivalent of what Appstats provides, but within a unit test? I'd like to see how many reads/writes to the datastore an individual test consumes, and assert on a limit to assure our code remains tight and efficient.

I've searched endlessly at stackoverflow and Google, either no one has asked and answered this before or I can't seem to come up with the right set of words.

This is for Java, NOT Python (which appears to have a facility for this sort of thing)