old_contents: from board import Board
  
  def test_addPiece():
      board = Board(5,5)
      board.addPiece(0, 1)
      assert board.boardMatrix.item((4,0)) == 1
  
new_contents: from board import Board
  
  def test_constructor():
      board = Board(0,0)
      assert board.boardMatrix.size == 0
      assert board.columns == 0
      assert board.rows == 0
  
      board = Board(5,5)
      assert board.boardMatrix.size == 25
      assert board.columns == 5
      assert board.rows == 5
  
  def test_addPiece():
      board = Board(5,5)
      board.addPiece(0, 1)
      assert board.boardMatrix.item((4,0)) == 1
  
subject: Add Board constructor test.