/// <summary>
///
/// </summary>
/// <param name="sender"></param>
/// <param name="args"></param>
protected void OutputGraph(Object sender, VertexEventArgs args)
{
IVertexColorizerAlgorithm algo = (IVertexColorizerAlgorithm)sender;
m_Colors = algo.Colors;
m_Algo.Write();
}
/// <summary>
///
/// </summary>
/// <param name="sender"></param>
/// <param name="args"></param>
public void TreeEdge(Object sender, EdgeEventArgs args)
{
IVertexColorizerAlgorithm algo = (IVertexColorizerAlgorithm)sender;
m_Colors = algo.Colors;
m_EdgeColors[args.Edge] = GraphColor.Black;
m_Algo.Write();
}
public void ColorReturned_WhenVertexIsAccessibleFromRoot()
{
var scenario = new ContractScenario
{
EdgesInGraph = new[] { new Edge <int>(1, 2) },
AccessibleVerticesFromRoot = new[] { 2 },
Root = 1,
DoComputation = true
};
IVertexColorizerAlgorithm <int> algorithm = CreateAlgorithmAndMaybeDoComputation(scenario);
Assert.IsNotNull(algorithm.GetVertexColor(2));
}
public void ExceptionThrown_WhenVertexDoesNotExistInGraph()
{
var scenario = new ContractScenario
{
EdgesInGraph = new[] { new Edge <int>(1, 2) },
AccessibleVerticesFromRoot = new[] { 2 },
Root = 1,
DoComputation = true
};
IVertexColorizerAlgorithm <int> algorithm = CreateAlgorithmAndMaybeDoComputation(scenario);
Assert.Throws <VertexNotFoundException>(() => algorithm.GetVertexColor(3));
}
/// <summary>
/// Extracts the color tables from the calling algorithm
/// </summary>
/// <param name="sender"></param>
/// <param name="args"></param>
protected void GetColors(Object sender, EdgeEventArgs args)
{
if (sender is IVertexColorizerAlgorithm)
{
IVertexColorizerAlgorithm algo = (IVertexColorizerAlgorithm)sender;
m_Colors = algo.Colors;
}
if (sender is IEdgeColorizerAlgorithm)
{
IEdgeColorizerAlgorithm algo = (IEdgeColorizerAlgorithm)sender;
m_EdgeColors = algo.EdgeColors;
}
else if (m_EdgeColors != null)
{
m_EdgeColors[args.Edge] = GraphColor.Black;
}
}
public void ExceptionThrown_WhenAlgorithmHasNotYetBeenComputed()
{
var scenario = new ContractScenario
{
EdgesInGraph = new[] { new Edge <int>(1, 2) },
SingleVerticesInGraph = new int[0],
AccessibleVerticesFromRoot = new[] { 2 },
Root = 1,
DoComputation = false
};
IVertexColorizerAlgorithm <int> algorithm = CreateAlgorithmAndMaybeDoComputation(scenario);
Type expectedExceptionType = GetExpectedExceptionType();
Assert.Throws(expectedExceptionType, () => algorithm.GetVertexColor(2));
#region Local function
Type GetExpectedExceptionType()
{
switch (_testedAlgorithm)
{
case var _ when _testedAlgorithm == typeof(AStarShortestPathAlgorithm <,>):
case var _ when _testedAlgorithm == typeof(BellmanFordShortestPathAlgorithm <,>):
case var _ when _testedAlgorithm == typeof(DagShortestPathAlgorithm <,>):
case var _ when _testedAlgorithm == typeof(DijkstraShortestPathAlgorithm <,>):
case var _ when _testedAlgorithm == typeof(UndirectedDijkstraShortestPathAlgorithm <,>):
return(typeof(NullReferenceException));
}
return(typeof(VertexNotFoundException));
}
#endregion
}
