public void MergeBranchWithCrossSections()
{
var network = CreateTestNetwork();
var branch1 = network.Channels.First();
var offset1 = Math.Sqrt(15 * 15 + 20 * 20);
var offset2 = Math.Sqrt(30 * 30 + 40 * 40) + 40 + Math.Sqrt(15 * 15 + 20 * 20);
var length1 = Math.Sqrt(30 * 30 + 40 * 40) + 20;
var length2 = 20 + Math.Sqrt(30 * 30 + 60 * 60);
var node = HydroNetworkHelper.SplitChannelAtNode(branch1, new Coordinate(50, 40), 0, 0);
// remove the newly added node
HydroNetworkHelper.MergeNodeBranches(node, network);
Assert.AreEqual(1, network.Branches.Count);
Assert.AreEqual(2, network.Nodes.Count);
Assert.AreEqual(2, network.CrossSections.Count());
Assert.AreEqual(2, branch1.CrossSections.Count());
Assert.AreEqual(offset1, branch1.CrossSections.First().Offset);
Assert.AreEqual(offset2, branch1.CrossSections.Skip(1).First().Offset);
Assert.AreEqual(length1 + length2, branch1.Geometry.Length);
Assert.AreEqual(branch1, branch1.CrossSections.First().Branch);
Assert.AreEqual(branch1, branch1.CrossSections.Skip(1).First().Branch);
}
