public void FasterPuzzleSolutionGenerator_SeedFirstColumn_Test1()
        {
            var sut = new OptimizedPuzzleSolutionGenerator(PuzzleSize.NineByNine);

            sut.Random = new TestNotSoRandom();
            sut.SeedFirstBox();
            sut.SeedSecondBox();
            sut.SeedThirdBox();

            sut.SeedFirstColumn();

            var solution = sut.PuzzleGrid;

            Approvals.Verify(solution);
        }
        public void FasterPuzzleSolutionGenerator_SeedFirstColumn_Test2()
        {
            for (var count = 0; count < 1000; count++)
            {
                var sut = new OptimizedPuzzleSolutionGenerator(PuzzleSize.NineByNine);

                sut.SeedFirstBox();
                sut.SeedSecondBox();
                sut.SeedThirdBox();
                sut.SeedFirstColumn();

                var solution = sut.PuzzleGrid;

                var column = solution.ByCol().First();

                AssertIfNotFullSet(column, PuzzleSize.NineByNine);
            }
        }