public void TestAddNumbers()
{
SudokuPuzzle sudoku = SudokuGenerator.AddNumbers(SudokuPuzzleTest.Size, SudokuPuzzleTest.Difficulty);
Assert.ThrowsException <ArgumentNullException>(() => SudokuGenerator.AddNumbers(null));
Assert.ThrowsException <ArgumentException>(() => SudokuGenerator.AddNumbers(SudokuPuzzle.MaximumSupportedSize, SudokuDifficulty.None));
if (SudokuPuzzle.MaximumSupportedSize > 1)
{
Assert.ThrowsException <ArgumentException>(() => SudokuGenerator.AddNumbers(2, SudokuDifficulty.Easy));
}
Assert.ThrowsException <ArgumentOutOfRangeException>(() => SudokuGenerator.AddNumbers(SudokuPuzzle.MaximumSupportedSize + 1, SudokuDifficulty.Easy));
Assert.ThrowsException <ArgumentOutOfRangeException>(() => SudokuGenerator.AddNumbers(-1, SudokuDifficulty.Easy));
for (int i = 0; i < sudoku.Size; i++)
{
for (int j = 0; j < sudoku.Size; j++)
{
int number = sudoku[i, j];
Assert.IsFalse(sudoku.RowContains(i, j, number, true));
Assert.IsFalse(sudoku.ColumnContains(i, j, number, true));
Assert.IsFalse(sudoku.BlockContains(i, j, number, true));
}
}
}