question: public void test_parkUntil_3 ( ) throws Exception { CyclicBarrier barrier = new CyclicBarrier ( 1 ) ; Parker parker = new Parker ( barrier , true , 1000 ) ; Thread parkerThread = new Thread ( parker ) ; UNSAFE . unpark ( parkerThread ) ; parkerThread . start ( ) ; parker . assertDurationIsInRange ( 0 ) ; parkerThread . join ( ) ; }
target:  Test the case where the thread is preemptively unparked. 