public HillTest()
        {
            matrix = new int[3, 3];

            matrix[0, 0] = 17;
            matrix[0, 1] = 21;
            matrix[0, 2] = 2;

            matrix[1, 0] = 17;
            matrix[1, 1] = 18;
            matrix[1, 2] = 2;

            matrix[2, 0] = 5;
            matrix[2, 1] = 21;
            matrix[2, 2] = 19;

            _target = new Hill(matrix);
        }
 public CeaserTest()
 {
     _target = new Ceaser(3);
 }
 public PlayFairTest()
 {
     _target = new PlayFair("playfairexample");
 }
 public RowTranspositionTest()
 {
     _target = new RowTransposition(new int[] { 4, 3, 1, 2, 5, 6, 7 });
 }
 public RailFenceTest()
 {
     _target = new RailFence(2);
 }