private static void GridIsGeneratedCorrectly(IPuzzlePolicy policy) { var validator = new GridValidator(); var solver = new SudokuSolver(validator); var generator = new SudokuGenerator(validator, solver); for (int i = 0; i < 5; i++) { var puzzle = generator.GeneratePuzzle(policy); var fullGrid = puzzle.FullGrid; Assert.IsTrue(validator.GridIsComplete(fullGrid)); Assert.IsTrue(validator.ValidRows(fullGrid)); Assert.IsTrue(validator.ValidColumns(fullGrid)); Assert.IsTrue(validator.ValidGroups(fullGrid)); var puzzleGrid = puzzle.puzzleGrid; // Actual number of blanks can be less than specified in policy // as we could not find a puzzle with on single solutions with MaxBlanks Assert.IsTrue(validator.GetNumBlanks(puzzleGrid) <= policy.MaxBlanks); } }