There are indeed test for coreflection of type annotation as written by the JCK team.
http://javaproject.us.oracle.com:8888/psa/work.do?bxn=wview&p_w_id=10774
Tests:
http://jre.us.oracle.com/java/re/jck/8/promoted/latest/binaries/JCK-runtime-8/tests/api/java_lang/reflect/ (test for reflect, see 'typeanno' subdirs)
http://jre.us.oracle.com/java/re/jck/8/promoted/latest/binaries/JCK-runtime-8/tests/api/java_lang/Class/typeanno/ (tests for Class)
coverage report:
http://sqeweb.us.oracle.com/coretools/comptools/users/ssides/jck/testdir/JCK_reflect_rep2/java/lang/reflect/package-summary.html
16-05-2014
There are numerous core reflection tests for type annotation written for JCK-runtime.
http://jre.us.oracle.com/java/re/jck/8/promoted/latest/binaries/JCK-runtime-8/tests/api/java_lang/reflect/index.html
http://jre.us.oracle.com/java/re/jck/8/promoted/latest/binaries/JCK-runtime-8/tests/api/java_lang/Class/idx.html
started analysis of coverage here,
http://wiki.se.oracle.com/display/JPG/Core+Reflection+APIs