public void Test1()
{
var gn0 = new GraphNode <int>(0);
var gn1 = new GraphNode <int>(1);
var gn2 = new GraphNode <int>(2);
var gn3 = new GraphNode <int>(3);
var gn4 = new GraphNode <int>(4);
gn0.Add(gn1);
gn0.Add(gn2);
gn1.Add(gn1);
gn1.Add(gn2);
gn2.Add(gn0);
gn2.Add(gn1);
gn3.Add(gn4);
gn4.Add(gn3);
var graph = new Graph <int>();
graph.Add(gn0, gn1, gn2, gn3, gn4);
var sut = new CountUnivistedNodes();
var count = sut.Count(graph, gn0);
Assert.That(count, Is.EqualTo(2));
}
public void Test3()
{
var a = new GraphNode <char>('A');
var b = new GraphNode <char>('B');
var e = new GraphNode <char>('E');
var f = new GraphNode <char>('F');
var d = new GraphNode <char>('D');
a.Add(b);
b.Add(e);
e.Add(f);
f.Add(d);
d.Add(a);
// another branch
var c = new GraphNode <char>('C');
var g = new GraphNode <char>('G');
a.Add(c);
c.Add(g);
// another branch
var x = new GraphNode <char>('X');
var w = new GraphNode <char>('W');
var k = new GraphNode <char>('K');
c.Add(x);
x.Add(w);
w.Add(k);
var detect = new DetectCycleInAGraph();
var hasCycle = detect.HasCycle(a);
Assert.IsTrue(hasCycle);
}
public void TestBFS()
{
GraphNode <int> graphRoot = new GraphNode <int>(1);
graphRoot.Add(2).Add(4);
GraphNode <int> expected = graphRoot.Add(3).Add(5).Add(6);
Assert.AreEqual(expected, BFS.Search(graphRoot, 6));
}
public void Three_Nodes_In_Tree_Graph_Returns_Valid_Path_With_Length_Of_Two()
{
var graphRoot = new GraphNode<int> {Value = 1};
var secondNode = new GraphNode<int> {Value = 2};
var thirdNode = new GraphNode<int> {Value = 3};
graphRoot.Add(secondNode);
graphRoot.Add(thirdNode);
var walker = new GraphWalker<int>(graphRoot);
var path = walker.TraverseTo(3);
Assert.AreEqual(true, path.IsValid);
Assert.AreEqual(2, path.Count(), "Path length should be two (nodes) for three node tree graph");
}
public void Test2()
{
GraphNode <int> one = new GraphNode <int>(1);
GraphNode <int> two = new GraphNode <int>(2);
one.Add(two);
GraphNode <int> three = new GraphNode <int>(3);
GraphNode <int> four = new GraphNode <int>(4);
three.Add(four);
bool result = impl.HasCycle(new List <GraphNode <int> >()
{
one, two, three, four
});
Assert.That(result, Is.False);
Assert.That(impl.Set.Count(), Is.EqualTo(4), "Invalid set count");
Assert.That(impl.Set[0], Is.EqualTo(-2));
Assert.That(impl.Set[1], Is.EqualTo(0));
Assert.That(impl.Set[2], Is.EqualTo(-2));
Assert.That(impl.Set[3], Is.EqualTo(2));
}
public void Test1()
{
GraphNode <int> warsaw = new GraphNode <int>(0);
GraphNode <int> ostrow = new GraphNode <int>(1);
GraphNode <int> kalisz = new GraphNode <int>(2);
GraphNode <int> wroclaw = new GraphNode <int>(3);
warsaw.Add(ostrow);
warsaw.Add(kalisz);
kalisz.Add(wroclaw);
var result = impl.Bfs(warsaw);
Console.WriteLine(String.Join(",", result));
Assert.That(result.SequenceEqual(new int[] { 0, 1, 2, 3 }), Is.True);
}
public void Test1()
{
var a = new GraphNode <int>(0);
var b = new GraphNode <int>(5);
var c = new GraphNode <int>(10);
var d = new GraphNode <int>(15);
a.Add(b);
b.Add(c);
c.Add(d);
var e = new GraphNode <int>(20);
var f = new GraphNode <int>(30);
a.Add(e);
e.Add(f);
//var result = dijkstra.ShortestPath(a, d);
//Console.WriteLine(String.Join(",", result));
}
public void Test2()
{
var start = new GraphNode <int>(10);
var twenty = new GraphNode <int>(20);
var thirty = new GraphNode <int>(30);
start.Add(twenty);
twenty.Add(thirty);
var detect = new DetectCycleInAGraph();
var hasCycle = detect.HasCycle(start);
Assert.IsFalse(hasCycle);
}
public void Test1()
{
var warsaw = new GraphNode <int>(0);
var ostrow = new GraphNode <int>(1);
var wroclaw = new GraphNode <int>(2);
var kalisz = new GraphNode <int>(3);
var gdansk = new GraphNode <int>(4);
var gdynia = new GraphNode <int>(5);
warsaw.Add(ostrow);
ostrow.Add(wroclaw);
wroclaw.Add(kalisz);
warsaw.Add(gdansk);
gdansk.Add(gdynia);
var result = new List <int>();
impl.Dfs(warsaw, result);
Assert.That(result.SequenceEqual(new int[] { 0, 1, 2, 3, 4, 5 }), Is.True);
}
public void Five_Nodes_In_A_Graph_Returns_Valid_Path_With_Length_Of_Three()
{
var graphRoot = new GraphNode<int> {Value = 1};
var secondNode = new GraphNode<int> {Value = 2};
var thirdNode = new GraphNode<int> {Value = 3};
var fourthNode = new GraphNode<int> {Value = 4};
var fifthNode = new GraphNode<int> {Value = 5};
//first level
graphRoot.Add(secondNode);
graphRoot.Add(thirdNode);
//second level
thirdNode.Add(fourthNode);
secondNode.Add(fifthNode);
fourthNode.Add(graphRoot);
var walker = new GraphWalker<int>(graphRoot);
var path = walker.TraverseTo(5);
Assert.AreEqual(true, path.IsValid);
Assert.AreEqual(3, path.Count(), "Path length should be three (nodes) for six node graph");
}
public void Test5()
{
GraphNode <int> one = new GraphNode <int>(1);
GraphNode <int> two = new GraphNode <int>(2);
one.Add(two);
GraphNode <int> three = new GraphNode <int>(3);
GraphNode <int> four = new GraphNode <int>(4);
three.Add(four);
GraphNode <int> five = new GraphNode <int>(5);
GraphNode <int> six = new GraphNode <int>(6);
five.Add(six);
var seven = new GraphNode <int>(7);
var eight = new GraphNode <int>(8);
seven.Add(eight);
var two2 = new GraphNode <int>(2);
var four2 = new GraphNode <int>(4);
two2.Add(four2);
bool result = impl.HasCycle(new List <GraphNode <int> >()
{
one, two, three, four, five, six, seven, eight, two2, four2
});
Assert.That(result, Is.False);
Assert.That(impl.Set.Count(), Is.EqualTo(8), "Invalid set count");
Assert.That(impl.Set[0], Is.EqualTo(-4));
Assert.That(impl.Set[1], Is.EqualTo(0));
Assert.That(impl.Set[2], Is.EqualTo(1));
Assert.That(impl.Set[3], Is.EqualTo(2));
Assert.That(impl.Set[4], Is.EqualTo(-2));
Assert.That(impl.Set[5], Is.EqualTo(4));
Assert.That(impl.Set[6], Is.EqualTo(-2));
Assert.That(impl.Set[7], Is.EqualTo(6));
}
public void Test1()
{
GraphNode <int> one = new GraphNode <int>(1);
GraphNode <int> two = new GraphNode <int>(2);
one.Add(two);
bool result = impl.HasCycle(new List <GraphNode <int> >()
{
one, two
});
Assert.That(result, Is.False);
Assert.That(impl.Set.Count(), Is.EqualTo(2), "Invalid set count");
Assert.That(impl.Set[0], Is.EqualTo(-2));
Assert.That(impl.Set[1], Is.EqualTo(0));
}
public void Two_Paths_To_Target_Returns_Shortest_Valid_Path()
{
var graphRoot = new GraphNode<int> {Value = 1};
var secondNode = new GraphNode<int> {Value = 2};
var thirdNode = new GraphNode<int> {Value = 3};
var fourthNode = new GraphNode<int> {Value = 4};
var fifthNode = new GraphNode<int> {Value = 5};
graphRoot.Add(secondNode);
graphRoot.Add(thirdNode);
secondNode.Add(fourthNode);
thirdNode.Add(fifthNode);
fourthNode.Add(fifthNode);
var walker = new GraphWalker<int>(graphRoot);
var path = walker.TraverseTo(5);
Assert.AreEqual(true, path.IsValid);
Assert.AreEqual(3, path.Count(), "Path length should be three (nodes) for five node graph");
}
public void Value_Not_In_Graph_Throws_Arg_Out_Of_Range()
{
var graphRoot = new GraphNode<int> {Value = 1};
var secondNode = new GraphNode<int> {Value = 2};
var thirdNode = new GraphNode<int> {Value = 3};
graphRoot.Add(secondNode);
graphRoot.Add(thirdNode);
var walker = new GraphWalker<int>(graphRoot);
var exceptional = false;
try
{
walker.TraverseTo(5);
}
catch (ArgumentOutOfRangeException ex)
{
exceptional = true;
Assert.AreEqual(5, ex.ActualValue);
Assert.AreEqual("value", ex.ParamName);
}
Assert.IsTrue(exceptional, "Expected to catch an argument out of range exception");
}