public void TwoPointsTest()
{
var node1 = new GraphElement(new[] { 15.0 }, "node1");
var node2 = new GraphElement(new[] { 15.0 }, "node2");
var el = new List<GraphElement> { node1, node2 };
var conn1 = new Connection(0, 1);
var con = new List<Connection> { conn1 };
var gm = new GraphManager(con, el);
var calculator = new LinearCalculator();
calculator.Calculate(gm);
Assert.AreEqual(0, gm.Connections[0].Distance);
}