text: var assert = require('assert');
  var BSTree = require('./bstree').BSTree;
  var BSTreeNode = require('./bstree').BSTreeNode;
  
  function compare(k1, k2) {
  	return parseInt(k1 - k2);
  }
  
  var tree = new BSTree(compare);
  
  tree.put(5, 'value-5');
  tree.put(1, 'value-1');
  tree.put(2, 'value-2');
  tree.put(4, 'value-4');
  tree.put(3, 'value-3');
  
  var node = tree.get(3);
  assert(node.value == 'value-3');
  
  node = tree.select(0);
  assert(node.value == 'value-1');
  
  node = tree.select(2);
  assert(node.value == 'value-3');
  
  var rk = tree.rank(3);
  assert(rk == 2);
  
  var ret = tree.floor(3); 
  assert(ret.value == 'value-3');
  
  ret = tree.ceiling(3);
  assert(ret.value == 'value-3');
  
  var min = tree.min();
  assert(min.value == 'value-1');
  
  var max = tree.max();
  assert(max.value == 'value-5');
  
  tree.deleteMin();
  var min = tree.min();
  assert(min.value == 'value-2');
  
  tree.deleteMax();
  var max = tree.max();
  assert(max.value == 'value-4');
  
  tree.delete(4);
  var max = tree.max();
  assert(max.value == 'value-3');
  
  var keys = tree.keys(1, 3);
  assert(keys.length == 2);
  