algorithms-and-data-structures/AlgorithmsAndDataStructures.Tests/Algorithm/Graph/MaxFlow/EdgeDisjointPathTests.cs at master · arst/algorithms-and-data-structures · GitHub

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using AlgorithmsAndDataStructures.Algorithms.Graph.MaximumFlow;
using Xunit;

namespace AlgorithmsAndDataStructures.Tests.Algorithm.Graph.MaxFlow;

public class EdgeDisjointPathTests
{
    [Fact]
    public void NoPaths()
    {
        var sut = new EdgeDisjointPath();
        var graph = new int[4][];

        for (var i = 0; i < graph.Length; i++) graph[i] = new int[4];

        graph[1][2] = 1;
        graph[1][3] = 1;
        graph[2][3] = 1;

        Assert.Equal(0, sut.GetEdgeDisjointPathCount(graph));
    }

    [Fact]
    public void SinglePath()
    {
        var sut = new EdgeDisjointPath();
        var graph = new int[4][];

        for (var i = 0; i < graph.Length; i++) graph[i] = new int[4];

        graph[0][1] = 1;
        graph[1][2] = 1;
        graph[1][3] = 1;
        graph[2][3] = 1;

        Assert.Equal(1, sut.GetEdgeDisjointPathCount(graph));
    }

    [Fact]
    public void BaselineWithZigZagPath()
    {
        var sut = new EdgeDisjointPath();
        var graph = new int[4][];

        for (var i = 0; i < graph.Length; i++) graph[i] = new int[4];

        graph[0][1] = 1;
        graph[0][2] = 1;
        graph[1][2] = 1;
        graph[1][3] = 1;
        graph[2][3] = 1;

        Assert.Equal(2, sut.GetEdgeDisjointPathCount(graph));
    }

    [Fact]
    public void BaselinWithStraightLines()
    {
        var sut = new EdgeDisjointPath();
        var graph = new int[4][];

        for (var i = 0; i < graph.Length; i++) graph[i] = new int[4];

        graph[0][1] = 1;
        graph[0][2] = 1;
        graph[1][3] = 1;
        graph[2][3] = 1;

        Assert.Equal(2, sut.GetEdgeDisjointPathCount(graph));
    }

    [Fact]
    public void BaselineSmall()
    {
        var sut = new EdgeDisjointPath();
        var graph = new int[6][];

        graph[0] = new[] { 0, 1, 1, 0, 0, 0 };
        graph[1] = new[] { 0, 0, 1, 1, 0, 0 };
        graph[2] = new[] { 0, 1, 0, 0, 1, 0 };
        graph[3] = new[] { 0, 0, 1, 0, 0, 1 };
        graph[4] = new[] { 0, 0, 0, 1, 0, 1 };
        graph[5] = new[] { 0, 0, 0, 0, 0, 0 };

        Assert.Equal(2, sut.GetEdgeDisjointPathCount(graph));
    }

    [Fact]
    public void Baseline()
    {
        var sut = new EdgeDisjointPath();
        var graph = new int[8][];
        graph[0] = new[] { 0, 1, 1, 1, 0, 0, 0, 0 };
        graph[1] = new[] { 0, 0, 1, 0, 0, 0, 0, 0 };
        graph[2] = new[] { 0, 0, 0, 1, 0, 0, 1, 0 };
        graph[3] = new[] { 0, 0, 0, 0, 0, 0, 1, 0 };
        graph[4] = new[] { 0, 0, 1, 0, 0, 0, 0, 1 };
        graph[5] = new[] { 0, 1, 0, 0, 0, 0, 0, 1 };
        graph[6] = new[] { 0, 0, 0, 0, 0, 1, 0, 1 };
        graph[7] = new[] { 0, 0, 0, 0, 0, 0, 0, 0 };

        Assert.Equal(2, sut.GetEdgeDisjointPathCount(graph));
    }
}