public void KruskalsMinimumSpanningTreeTest()
{
// Assign
var graph = CreateTestWeightedGraph();
var expectedEdges = new[]
{
graph["F", "E"], graph["F", "A"], graph["A", "B"], graph["D", "I"],
graph["E", "H"], graph["E", "G"], graph["D", "C"], graph["I", "J"],
graph["E", "I"]
};
var expected = new MinimumSpanTree <string>(expectedEdges, 48);
// Act
var actual = graph.KruskalsMinimumSpanningTree();
// Assert
Assert.True(MinimumSpanningTreeEquals(expected, actual));
}
private bool MinimumSpanningTreeEquals(MinimumSpanTree <string> x, MinimumSpanTree <string> y)
{
if (x == null || y == null || x.Edges.Count != y.Edges.Count || x.Distance != y.Distance)
{
return(false);
}
var thisEdgesKeys = new HashSet <Tuple <string, string> >(x.Edges.Select(key => new Tuple <string, string>(key.StartVertex.Value, key.EndVertex.Value)));
foreach (var edge in y.Edges)
{
var normalKey = new Tuple <string, string>(edge.StartVertex.Value, edge.EndVertex.Value);
var invertedKey = new Tuple <string, string>(edge.EndVertex.Value, edge.StartVertex.Value);
if (!thisEdgesKeys.Contains(normalKey) && !thisEdgesKeys.Contains(invertedKey))
{
return(false);
}
}
return(true);
}
private bool MinimumSpanningTreeEquals(MinimumSpanTree x, MinimumSpanTree y)
{
if (x == null || y == null || x.Edges.Count != y.Edges.Count || x.Distance != y.Distance)
return false;
var thisEdgesKeys = new HashSet<Tuple<string, string>>(x.Edges.Select(key => new Tuple<string, string>(key.StartVertex.Label, key.EndVertex.Label)));
foreach (var edge in y.Edges)
{
var normalKey = new Tuple<string, string>(edge.StartVertex.Label, edge.EndVertex.Label);
var invertedKey = new Tuple<string, string>(edge.EndVertex.Label, edge.StartVertex.Label);
if (!thisEdgesKeys.Contains(normalKey) && !thisEdgesKeys.Contains(invertedKey))
{
return false;
}
}
return true;
}
public void PrimsMinimumSpanningTreeTest()
{
// Assign
var graph = CreateTestWeightedGraph();
var expectedEdges = new[]
{
graph["F", "E"], graph["F", "A"], graph["A", "B"], graph["D", "I"],
graph["E", "H"], graph["E", "G"], graph["D", "C"], graph["I", "J"],
graph["E", "I"]
};
var expected = new MinimumSpanTree(expectedEdges, 48);
// Act
var actual = graph.PrimsMinimumSpanningTree();
// Assert
Assert.IsTrue(MinimumSpanningTreeEquals(expected, actual));
}
