@Test
public void testyTail() {

	final RingBuffer<Integer> ring = new RingBufferSimple<Integer>(10);
	assertEquals(ring.length(), 10);
	ring.setTail(109, 109);
	assertEquals(ring.count(), 1);
	assertEquals(ring.get(109), (Integer) 109);
	for (int k = 100; k < 109; k++) {
		assertEquals(ring.get(k), null);
	}
	for (int k = 100; k < 110; k++) {
		ring.set(k, k);
	}
	assertEquals(ring.count(), 10);
	for (int k = 100; k < 110; k++) {
		assertEquals(ring.get(k), (Integer) k);
	}
	ring.setTail(104, 204);
	assertEquals(ring.count(), 5);
	assertEquals(ring.head(), 95);
	assertEquals(ring.tail(), 104);
	assertEquals(ring.get(104), (Integer) 204);
	for (int k = 100; k < 104; k++) {
		assertEquals(ring.get(k), (Integer) k);
	}
	for (int k = 95; k < 100; k++) {
		assertEquals(ring.get(k), (Integer) null);
	}
	ring.set(95, 95);
	assertEquals(ring.get(95), (Integer) 95);
	assertEquals(ring.count(), 6);
}