public void Should_BidirectionalSearch_Throw_If_Node_Is_Null()
{
//arrange
var graph = new MyGraph <int>(5);
graph.AddVertex(0, 0);
//act
Action actFrom = () => graph.BidirectionalSearch(1, 0).ToArray();
Action actTo = () => graph.BidirectionalSearch(0, 1).ToArray();
//assert
actFrom.ShouldThrow <ArgumentException>();
actTo.ShouldThrow <ArgumentException>();
graph.Capacity.ShouldBeEquivalentTo(5);
graph.Count.ShouldBeEquivalentTo(1);
}
public void Should_BidirectionalSearch_False()
{
//arrange
var graph = new MyGraph <int>(15);
graph.AddVertex(0, 0);
graph.AddVertex(1, 1);
graph.AddVertex(2, 2);
graph.AddVertex(3, 3);
graph.AddVertex(4, 4);
graph.AddVertex(5, 5);
graph.AddVertex(6, 6);
graph.AddVertex(8, 8);
graph.AddVertex(9, 9);
graph.AddVertex(10, 10);
graph.AddVertex(11, 11);
graph.AddVertex(12, 12);
graph.AddVertex(13, 13);
graph.AddVertex(14, 14);
graph.AddEdge(0, 4);
graph.AddEdge(1, 4);
graph.AddEdge(2, 5);
graph.AddEdge(3, 5);
graph.AddEdge(4, 0);
graph.AddEdge(4, 1);
graph.AddEdge(4, 6);
graph.AddEdge(5, 2);
graph.AddEdge(5, 3);
graph.AddEdge(5, 6);
graph.AddEdge(6, 4);
graph.AddEdge(6, 5);
graph.AddEdge(8, 9);
graph.AddEdge(8, 10);
graph.AddEdge(9, 8);
graph.AddEdge(9, 11);
graph.AddEdge(9, 12);
graph.AddEdge(10, 8);
graph.AddEdge(10, 13);
graph.AddEdge(10, 14);
graph.AddEdge(11, 9);
graph.AddEdge(12, 9);
graph.AddEdge(13, 10);
graph.AddEdge(14, 10);
//act
var result = graph.BidirectionalSearch(1, 14);
//assert
result.ShouldBeEquivalentTo(null);
graph.Capacity.ShouldBeEquivalentTo(15);
graph.Count.ShouldBeEquivalentTo(14);
}
public void Should_BidirectionalSearch_Throw_If_Out_Of_Range()
{
//arrange
var graph = new MyGraph <int>(5);
//act
Action actLowerFrom = () => graph.BidirectionalSearch(-1, 1);
Action actHigherFrom = () => graph.BidirectionalSearch(6, 1);
Action actLowerTo = () => graph.BidirectionalSearch(1, -1);
Action actHigherTo = () => graph.BidirectionalSearch(1, 6);
//assert
actLowerFrom.ShouldThrow <ArgumentOutOfRangeException>();
actHigherFrom.ShouldThrow <ArgumentOutOfRangeException>();
actLowerTo.ShouldThrow <ArgumentOutOfRangeException>();
actHigherTo.ShouldThrow <ArgumentOutOfRangeException>();
graph.Capacity.ShouldBeEquivalentTo(5);
graph.Count.ShouldBeEquivalentTo(0);
}
public void Should_BidirectionalSearch_Length_One()
{
//arrange
var graph = new MyGraph <int>(1);
graph.AddVertex(0, 0);
//act
var result = graph.BidirectionalSearch(0, 0);
//assert
result[0].Count().ShouldBeEquivalentTo(1);
result[1].Count().ShouldBeEquivalentTo(1);
result[0].ElementAt(0).ShouldBeEquivalentTo(0);
result[1].ElementAt(0).ShouldBeEquivalentTo(0);
graph.Capacity.ShouldBeEquivalentTo(1);
graph.Count.ShouldBeEquivalentTo(1);
}
public void Should_BidirectionalSearch()
{
//arrange
var graph = new MyGraph <int>(15);
graph.AddVertex(0, 0);
graph.AddVertex(1, 1);
graph.AddVertex(2, 2);
graph.AddVertex(3, 3);
graph.AddVertex(4, 4);
graph.AddVertex(5, 5);
graph.AddVertex(6, 6);
graph.AddVertex(7, 7);
graph.AddVertex(8, 8);
graph.AddVertex(9, 9);
graph.AddVertex(10, 10);
graph.AddVertex(11, 11);
graph.AddVertex(12, 12);
graph.AddVertex(13, 13);
graph.AddVertex(14, 14);
graph.AddEdge(0, 4);
graph.AddEdge(1, 4);
graph.AddEdge(2, 5);
graph.AddEdge(3, 5);
graph.AddEdge(4, 0);
graph.AddEdge(4, 1);
graph.AddEdge(4, 6);
graph.AddEdge(5, 2);
graph.AddEdge(5, 3);
graph.AddEdge(5, 6);
graph.AddEdge(6, 4);
graph.AddEdge(6, 5);
graph.AddEdge(6, 7);
graph.AddEdge(7, 6);
graph.AddEdge(7, 8);
graph.AddEdge(8, 7);
graph.AddEdge(8, 9);
graph.AddEdge(8, 10);
graph.AddEdge(9, 8);
graph.AddEdge(9, 11);
graph.AddEdge(9, 12);
graph.AddEdge(10, 8);
graph.AddEdge(10, 13);
graph.AddEdge(10, 14);
graph.AddEdge(11, 9);
graph.AddEdge(12, 9);
graph.AddEdge(13, 10);
graph.AddEdge(14, 10);
var fromSearch = new[] { 1, 4, 0, 6, 5, 7 };
var toSearch = new[] { 14, 10, 8, 13, 7, 9 };
//act
var result = graph.BidirectionalSearch(1, 14);
//assert
result[0].Count().ShouldBeEquivalentTo(fromSearch.Length);
result[1].Count().ShouldBeEquivalentTo(toSearch.Length);
for (int i = 0; i < fromSearch.Length; i++)
{
fromSearch[i].ShouldBeEquivalentTo(result[0].ElementAt(i));
}
for (int i = 0; i < toSearch.Length; i++)
{
toSearch[i].ShouldBeEquivalentTo(result[1].ElementAt(i));
}
graph.Capacity.ShouldBeEquivalentTo(15);
graph.Count.ShouldBeEquivalentTo(15);
}
public bool RouteBetweenNodes(MyGraph <int> graph, int fromIndex, int toIndex) => graph.BidirectionalSearch(fromIndex, toIndex) != null;
