private void testRemovePerformsShift(int most, int capacity) {
int next = most - 1;
if (next < 0) next += capacity;
int least = most - 2;
if (least < 0) least += capacity;
TripleWithHash t1 = TripleWithHash.create(most, "s p o");
TripleWithHash t2 = TripleWithHash.create(next, "a b c");
TripleWithHash t3 = TripleWithHash.create(most, "x y z");
htb.add(t1);
htb.add(t2);
htb.add(t3);
assertSame(t1, htb.getItemForTestingAt(most));
assertSame(t2, htb.getItemForTestingAt(next));
assertSame(t3, htb.getItemForTestingAt(least));
//
htb.remove(t1);
assertSame(t3, htb.getItemForTestingAt(most));
assertSame(t2, htb.getItemForTestingAt(next));
assertSame(null, htb.getItemForTestingAt(least));
}