public void VisitAllNodes()
{
// Arrange
var bfsGraph = new BFSGraph();
bfsGraph.AddEdge(1, 2);
bfsGraph.ResetDistances();
bfsGraph.ResetSourcesDistance(2);
// Act
bfsGraph.VisitAllNodes(2);
// Assert
Assert.Equal(2, bfsGraph.Distances.Count);
Assert.Equal(1, bfsGraph.Distances.First().Key);
Assert.Equal(1, bfsGraph.Distances.First().Value);
Assert.Equal(2, bfsGraph.Distances.Last().Key);
Assert.Equal(0, bfsGraph.Distances.Last().Value);
// Paths
Assert.Equal(1, bfsGraph.Paths.Count);
Assert.Equal(1, bfsGraph.Paths.Last().Key);
Assert.Equal(2, bfsGraph.Paths.Last().Value);
}
public void AddingExistingEdgesDoNothing()
{
// Arrange
var bfsGraph = new BFSGraph();
// Act
bfsGraph.AddEdge(1, 2);
bfsGraph.AddEdge(1, 2);
// Assert
Assert.Equal(2, bfsGraph.References.Count());
}
public void AddEdgeTest()
{
// Arrange
var bfsGraph = new BFSGraph();
// Act
bfsGraph.AddEdge(1, 2);
// Assert
Assert.Equal(1, bfsGraph.References.First().Key);
Assert.Equal(2, bfsGraph.References.First().Value.First());
Assert.Equal(2, bfsGraph.References.Last().Key);
Assert.Equal(1, bfsGraph.References.Last().Value.First());
}
public void AddEdgeTestDetailed()
{
// Arrange
var bfsGraph = new BFSGraph();
bfsGraph.AddEdge(1, 2);
bfsGraph.AddEdge(1, 3);
bfsGraph.AddEdge(1, 4);
bfsGraph.AddEdge(4, 5);
bfsGraph.AddEdge(2, 6);
bfsGraph.AddEdge(4, 7);
bfsGraph.AddEdge(5, 6);
bfsGraph.AddEdge(6, 7);
// Act
var references = bfsGraph.References.ToList();
// Assert
Assert.Equal(1, references[0].Key);
Assert.Equal(2, references[0].Value[0]);
Assert.Equal(3, references[0].Value[1]);
Assert.Equal(4, references[0].Value[2]);
Assert.Equal(2, references[1].Key);
Assert.Equal(1, references[1].Value[0]);
Assert.Equal(6, references[1].Value[1]);
Assert.Equal(3, references[2].Key);
Assert.Equal(1, references[2].Value[0]);
Assert.Equal(4, references[3].Key);
Assert.Equal(1, references[3].Value[0]);
Assert.Equal(5, references[3].Value[1]);
Assert.Equal(7, references[3].Value[2]);
Assert.Equal(5, references[4].Key);
Assert.Equal(4, references[4].Value[0]);
Assert.Equal(6, references[4].Value[1]);
Assert.Equal(6, references[5].Key);
Assert.Equal(2, references[5].Value[0]);
Assert.Equal(5, references[5].Value[1]);
Assert.Equal(7, references[5].Value[2]);
Assert.Equal(7, references[6].Key);
Assert.Equal(4, references[6].Value[0]);
Assert.Equal(6, references[6].Value[1]);
}
public void ShortestPath()
{
// Arrange
var bfsGraph = new BFSGraph();
bfsGraph.AddEdge(1, 2);
// Act & Assert
var paths = bfsGraph.ShortestPath(1, 2);
// Assert
Assert.Equal(2, paths.Count);
Assert.Equal(1, paths.First());
Assert.Equal(2, paths.Last());
}
public void ResetDistances()
{
// Arrange
var bfsGraph = new BFSGraph();
bfsGraph.AddEdge(1, 2);
// Act
bfsGraph.ResetDistances();
// Assert
Assert.Equal(1, bfsGraph.Distances.First().Key);
Assert.Equal(-1, bfsGraph.Distances.First().Value);
Assert.Equal(2, bfsGraph.Distances.Last().Key);
Assert.Equal(-1, bfsGraph.Distances.Last().Value);
}
public void BuildPath()
{
// Arrange
var bfsGraph = new BFSGraph();
bfsGraph.AddEdge(1, 2);
bfsGraph.ResetDistances();
bfsGraph.ResetSourcesDistance(1);
bfsGraph.VisitAllNodes(1);
// Act
var paths = bfsGraph.BuildPath(1, 2);
// Assert
Assert.Equal(2, paths.Count);
Assert.Equal(1, paths.First());
Assert.Equal(2, paths.Last());
}
public void ShortestPath6()
{
// Arrange
var bfsGraph = new BFSGraph();
bfsGraph.AddEdge(1, 2);
bfsGraph.AddEdge(2, 3);
bfsGraph.AddEdge(3, 4);
bfsGraph.AddEdge(4, 5);
bfsGraph.AddEdge(5, 6);
// Act
var paths = bfsGraph.ShortestPath(1, 6).ToList();
// Assert
Assert.Equal(1, paths[0]);
Assert.Equal(2, paths[1]);
Assert.Equal(3, paths[2]);
Assert.Equal(4, paths[3]);
Assert.Equal(5, paths[4]);
Assert.Equal(6, paths[5]);
}
public void ShortestPath5()
{
// Arrange
var bfsGraph = new BFSGraph();
bfsGraph.AddEdge(1, 2);
bfsGraph.AddEdge(1, 3);
bfsGraph.AddEdge(1, 4);
bfsGraph.AddEdge(4, 5);
bfsGraph.AddEdge(2, 6);
bfsGraph.AddEdge(4, 7);
bfsGraph.AddEdge(5, 6);
bfsGraph.AddEdge(6, 7);
// Act
var paths = bfsGraph.ShortestPath(2, 7).ToList();
// Assert
Assert.Equal(2, paths[0]);
Assert.Equal(6, paths[1]);
Assert.Equal(7, paths[2]);
}
public void UpdateDistancesAndPaths()
{
// Arrange
var bfsGraph = new BFSGraph();
bfsGraph.AddEdge(1, 2);
bfsGraph.ResetDistances();
bfsGraph.ResetSourcesDistance(2);
// Act
bfsGraph.UpdateDistancesAndPaths(2);
// Assert
Assert.Equal(1, bfsGraph.Distances.First().Key);
Assert.Equal(1, bfsGraph.Distances.First().Value); // Updated distance
Assert.Equal(2, bfsGraph.Distances.Last().Key);
Assert.Equal(0, bfsGraph.Distances.Last().Value);
// Paths
Assert.Equal(1, bfsGraph.Paths.Last().Key);
Assert.Equal(2, bfsGraph.Paths.Last().Value);
}
