@Test
public void testDeletingBackOrder() {
final LongSkipList list = new LongSkipList();
for (int i = 0; i < 1000; i++) {
list.add(i);
}
for (int i = 999; i >= 0; i--) {
Assert.assertTrue(list.remove(i));
Assert.assertFalse(list.remove(i));
}
Assert.assertEquals(0, list.size());
}
@Test
public void testDeleting() {
final LongSkipList list = new LongSkipList();
for (int i = 0; i < 1000; i++) {
list.add(i);
list.add(i);
}
Assert.assertEquals(2000, list.size());
for (int i = 0; i < 1000; i++) {
Assert.assertTrue(list.remove(i));
}
Assert.assertEquals(1000, list.size());
for (int i = 0; i < 1000; i++) {
Assert.assertTrue(list.remove(i));
}
Assert.assertEquals(0, list.size());
}
@Test
public void testDeletingIteration() {
final LongSkipList list = new LongSkipList();
for (int i = 0; i < 1000; i += 2) {
list.add(i);
list.add(i);
}
for (int i = 1; i < 1000; i += 2) {
list.add(i);
list.add(i);
}
Assert.assertEquals(2000, list.size());
LongSkipList.SkipListNode node = list.getMinimumNode();
for (long i = 0; i < 1000; i++) {
assert node != null;
Assert.assertEquals(i, node.getKey());
node = list.getNext(node);
Assert.assertEquals(i, node.getKey());
node = list.getNext(node);
}
Assert.assertNull(node);
node = list.getMaximumNode();
for (long i = 0; i < 1000; i++) {
assert node != null;
Assert.assertEquals(999 - i, node.getKey());
node = list.getPrevious(node);
Assert.assertEquals(999 - i, node.getKey());
node = list.getPrevious(node);
}
Assert.assertNull(node);
for (int i = 0; i < 1000; i++) {
Assert.assertTrue(list.remove(i));
}
Assert.assertEquals(1000, list.size());
node = list.getMinimumNode();
for (long i = 0; i < 1000; i++) {
assert node != null;
Assert.assertEquals(i, node.getKey());
node = list.getNext(node);
}
Assert.assertNull(node);
node = list.getMaximumNode();
for (long i = 0; i < 1000; i++) {
assert node != null;
Assert.assertEquals(999L - i, node.getKey());
node = list.getPrevious(node);
}
Assert.assertNull(node);
}
@Test
public void testCount() {
LongSkipList list = new LongSkipList();
list.add(3);
Assert.assertEquals(1, list.size());
list.remove(3);
Assert.assertEquals(0, list.size());
list.add(2);
list.add(4);
list.add(5);
list.add(6);
list.add(7);
list.add(8);
list.add(9);
list.add(10);
list.add(11);
list.add(12);
Assert.assertEquals(10, list.size());
list.remove(8);
Assert.assertEquals(9, list.size());
list.remove(4);
Assert.assertEquals(8, list.size());
list.remove(2);
Assert.assertEquals(7, list.size());
list.remove(10);
Assert.assertEquals(6, list.size());
list.remove(12);
Assert.assertEquals(5, list.size());
list.remove(6);
Assert.assertEquals(4, list.size());
list.remove(7);
Assert.assertEquals(3, list.size());
list.remove(5);
Assert.assertEquals(2, list.size());
list.remove(11);
Assert.assertEquals(1, list.size());
list.remove(9);
Assert.assertEquals(0, list.size());
}
