function test__constructException()
{
$this->setExpectedException('\\Collections\\StateException');
$tree = new AvlTree();
$tree->add(1);
new SortedSet(null, $tree);
}
function test__clone()
{
$avl = new AvlTree();
$avl->add(1);
$avl->add(0);
$avl->add(2);
$copy = clone $avl;
$this->assertCount(3, $copy);
$avl->add(3);
$this->assertCount(3, $copy);
$this->assertCount(4, $avl);
}
