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

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
using System.Linq;
using AlgorithmsAndDataStructures.Algorithms.Graph.Voting;
using Xunit;

namespace AlgorithmsAndDataStructures.Tests.Algorithm.Graph.Voting;

public class SchulzeMethodTests
{
    [Fact]
    public void ComplexVote()
    {
        var sut = new SchulzeMethod();

        var ballots = new int[20][];

        for (var i = 0; i < 10; i++)
        {
            ballots[i] = new int[3];
            ballots[i][0] = 0;
            ballots[i][1] = 1;
            ballots[i][2] = 2;
        }

        for (var i = 10; i < 15; i++)
        {
            ballots[i] = new int[3];
            ballots[i][0] = 1;
            ballots[i][1] = 2;
            ballots[i][2] = 0;
        }

        for (var i = 15; i < 20; i++)
        {
            ballots[i] = new int[3];
            ballots[i][0] = 2;
            ballots[i][1] = 0;
            ballots[i][2] = 1;
        }

        var ballotWinners = sut.GetWinners(ballots);

        Assert.Equal(0, ballotWinners.First().Candidate);
        Assert.Equal(2, ballotWinners.First().Score);

        Assert.Equal(1, ballotWinners.Skip(1).First().Candidate);
        Assert.Equal(1, ballotWinners.Skip(1).First().Score);

        Assert.Equal(2, ballotWinners.Skip(2).First().Candidate);
        Assert.Equal(0, ballotWinners.Skip(2).First().Score);
    }

    [Fact]
    public void BaseVote()
    {
        var sut = new SchulzeMethod();

        var ballots = new int[3][];

        ballots[0] = new int[3];
        ballots[0][0] = 0;
        ballots[0][1] = 1;
        ballots[0][2] = 2;

        ballots[1] = new int[3];
        ballots[1][0] = 2;
        ballots[1][1] = 1;
        ballots[1][2] = 0;

        ballots[2] = new int[3];
        ballots[2][0] = 1;
        ballots[2][1] = 2;
        ballots[2][2] = 0;

        var ballotWinners = sut.GetWinners(ballots);

        Assert.Equal(1, ballotWinners.First().Candidate);
        Assert.Equal(2, ballotWinners.First().Score);

        Assert.Equal(2, ballotWinners.Skip(1).First().Candidate);
        Assert.Equal(1, ballotWinners.Skip(1).First().Score);

        Assert.Equal(0, ballotWinners.Skip(2).First().Candidate);
        Assert.Equal(0, ballotWinners.Skip(2).First().Score);
    }
}