public void MoveTetrimino_WithSpace_ReplaceBlocks(int byX, int byY)
{
Block[] blocks = { new Block(), new Block() };
Tetrimino tetrimino = new Tetrimino(Direction.UP, blocks);
_tetrisBoard.AddTetriminoAt(tetrimino, new Point(2, 2));
Point byPoint = new Point(byX, byY);
_tetrisBoard.MoveTetrimino(tetrimino, byPoint);
Point blockPoint1 = Point.AddPoints(new Point(2, 1), byPoint);
Point blockPoint2 = Point.AddPoints(new Point(2, 2), byPoint);
Assert.Equal(blocks[0], _tetrisBoard.BlockAt(blockPoint1));
Assert.Equal(blocks[1], _tetrisBoard.BlockAt(blockPoint2));
}