public void TestGetHashCode()
{
SudokuDifficulty newDifficulty = SudokuPuzzleTest.Difficulty == SudokuDifficulty.None ? SudokuDifficulty.Easy : SudokuDifficulty.None;
SudokuPuzzle puzzle = new SudokuPuzzle(this.Sudoku.Size, newDifficulty);
SudokuGenerator.AddNumbers(puzzle);
for (int i = 0; i < this.Sudoku.Size; i++)
{
for (int j = 0; j < this.Sudoku.Size; j++)
{
this.Sudoku[i, j] = puzzle[i, j];
}
}
int hashCode = puzzle.GetHashCode();
Assert.AreEqual(this.Sudoku, puzzle);
Assert.AreEqual(this.Sudoku.GetHashCode(), hashCode);
this.Sudoku[0, 0] = 0;
Assert.AreNotEqual(this.Sudoku, puzzle);
Assert.AreNotEqual(this.Sudoku.GetHashCode(), hashCode);
}