### Question:
HugeLongArrayQueue { public boolean isEmpty() { return head == tail; } private  HugeLongArrayQueue(HugeLongArray array); static HugeLongArrayQueue newQueue(long capacity, AllocationTracker tracker); void add(long v); long remove(); long size(); boolean isEmpty();  }### Answer:
@Test void testIsEmpty() { var q = HugeLongArrayQueue.newQueue(10, AllocationTracker.empty()); assertTrue(q.isEmpty()); q.add(42); assertFalse(q.isEmpty()); q.remove(); assertTrue(q.isEmpty()); }