public void CloneTest()
{
var node = new GraphElement(new[] { 15.0 }, "node");
var nodeClone = node.Clone();
Assert.AreEqual(node.Content, nodeClone.Content);
Assert.AreEqual(node.Id, nodeClone.Id);
Assert.AreNotSame(node, nodeClone);
Assert.IsInstanceOf(typeof(GraphElement), nodeClone);
}