### Question:
ResizableSemaphore extends Semaphore { @Override protected void reducePermits(int reduction) { super.reducePermits(reduction); } ResizableSemaphore(int permits, boolean fair);  ResizableSemaphore(int permits); void increasePermits(int increase);  }### Answer:
@Test public void testReducePermits() throws Exception { semaphore = new ResizableSemaphore(10); semaphore.reducePermits(6); int availablePermits = semaphore.availablePermits(); assertEquals(availablePermits, 4, "Expected a decrease to 4 permits available."); }