public void InsertSameElement_ReturnsSameNode()
{
const int item = 10;
var node = new TwoNode <int>(item, EmptyTwoThree <int> .Instance, EmptyTwoThree <int> .Instance);
int splitValue;
ITwoThree <int> splitLeft, splitRight;
var result = node.Insert(item, Comparer <int> .Default, out splitLeft, out splitRight, out splitValue);
Assert.AreSame(node, result);
}
public void InsertNewElement_ReturnsThreeNode()
{
const int first = 10, second = 20;
var node = new TwoNode <int>(first, EmptyTwoThree <int> .Instance, EmptyTwoThree <int> .Instance);
int splitValue;
ITwoThree <int> splitLeft, splitRight;
var result = node.Insert(second, Comparer <int> .Default, out splitLeft, out splitRight, out splitValue);
Assert.IsNotNull(result);
Assert.IsInstanceOf <ThreeNode <int> >(result);
}
