[Fact]
        public void WinningCondition_DiagonalWin_Complex_ShouldReturnTrue()
        {
            // arrange

            Board board = new ViewModels.Board(4, 4);

            // __OO
            // _OX_
            // OXX_
            // _X__
            var cross = SignType.Cross;
            var circle = SignType.Circle;
            board.SetSignOnCell(2, circle);
            board.SetSignOnCell(3, circle);
            board.SetSignOnCell(5, circle);
            board.SetSignOnCell(6, cross);
            board.SetSignOnCell(8, circle);
            board.SetSignOnCell(9, cross);
            board.SetSignOnCell(10, cross);
            board.SetSignOnCell(13, cross);

            // act
            bool isBoardInWinningState = GameUtils.IsWinningConditionSatisfied(board, 3);

            // assert
            Assert.True(isBoardInWinningState);
        }

        [Fact]
        public void WinningCondition_DiagonalWin_Complex_ShouldReturnFalse()
        {
            // arrange

            Board board = new ViewModels.Board(4, 4);

            // OO_O
            // O_OO
            // XX_X
            // X_XX
            var cross = SignType.Cross;
            var circle = SignType.Circle;
            board.SetSignOnCell(0, circle);
            board.SetSignOnCell(1, circle);
            board.SetSignOnCell(3, circle);
            board.SetSignOnCell(4, circle);
            board.SetSignOnCell(6, circle);
            board.SetSignOnCell(7, circle);

            board.SetSignOnCell(8, cross);
            board.SetSignOnCell(9, cross);
            board.SetSignOnCell(11, cross);
            board.SetSignOnCell(12, cross);
            board.SetSignOnCell(14, cross);
            board.SetSignOnCell(15, cross);

            // act
            bool isBoardInWinningState = GameUtils.IsWinningConditionSatisfied(board, 3);

            // assert
            Assert.False(isBoardInWinningState);
        }

        [Fact]
        public void WinningCondition_LineWin_Complex2_ShouldReturnTrue()
        {
            // arrange

            Board board = new ViewModels.Board(3, 5);

            // X_XXO
            // XOOOX
            // OOXOX
            var cross = SignType.Cross;
            var circle = SignType.Circle;
            board.SetSignOnCell(0, cross);
            board.SetSignOnCell(2, cross);
            board.SetSignOnCell(3, cross);
            board.SetSignOnCell(4, circle);

            board.SetSignOnCell(5, cross);
            board.SetSignOnCell(6, circle);
            board.SetSignOnCell(7, circle);
            board.SetSignOnCell(8, circle);
            board.SetSignOnCell(9, cross);

            board.SetSignOnCell(10, circle);
            board.SetSignOnCell(11, circle);
            board.SetSignOnCell(12, cross);
            board.SetSignOnCell(13, circle);
            board.SetSignOnCell(14, cross);

            // act
            bool isBoardInWinningState = GameUtils.IsWinningConditionSatisfied(board, 3);

            // assert
            Assert.True(isBoardInWinningState);
        }