def test_white_rooks_cannot_move_if_piece_in_front():
# Arrange
board = Board.empty()
rook = Rook(Player.WHITE)
rook_square = Square.at(4, 4)
board.set_piece(rook_square, rook)
obstructing_square1 = Square.at(3, 4)
obstruction = Pawn(Player.WHITE)
board.set_piece(obstructing_square1, obstruction)
obstructing_square2 = Square.at(5, 4)
obstruction = Pawn(Player.WHITE)
board.set_piece(obstructing_square2, obstruction)
obstructing_square3 = Square.at(4, 3)
obstruction = Pawn(Player.WHITE)
board.set_piece(obstructing_square3, obstruction)
obstructing_square3 = Square.at(4, 5)
obstruction = Pawn(Player.WHITE)
board.set_piece(obstructing_square3, obstruction)
# Act
moves = rook.get_available_moves(board)
# Assert
assert len(moves) == 0
def test_en_passant():
# Arrange
board = Board.empty()
defending_pawn = Pawn(Player.WHITE)
defending_pawn_square_1 = Square.at(1, 4)
board.set_piece(defending_pawn_square_1, defending_pawn)
attacking_pawn = Pawn(Player.BLACK)
attacking_pawn_square_1 = Square.at(3, 5)
board.set_piece(attacking_pawn_square_1, attacking_pawn)
# Act
defending_pawn_moves_1 = defending_pawn.get_available_moves(board)
defending_pawn_square_2 = Square.at(3, 4)
# Assert
assert defending_pawn_square_2 in defending_pawn_moves_1
board.move_piece(defending_pawn_square_1, defending_pawn_square_2)
attacking_pawn_moves_1 = attacking_pawn.get_available_moves(board)
en_passant_square = Square.at(2, 4)
assert en_passant_square in attacking_pawn_moves_1
board.move_piece(attacking_pawn_square_1, en_passant_square)
assert board.get_piece(defending_pawn_square_2) is None
def test_black_rooks_can_take_white_pieces_but_not_black():
# Arrange
board = Board.empty()
rook = Rook(Player.BLACK)
rook_square = Square.at(4, 4)
board.set_piece(rook_square, rook)
obstructing_square1 = Square.at(3, 4)
obstruction = Pawn(Player.WHITE)
board.set_piece(obstructing_square1, obstruction)
obstructing_square2 = Square.at(5, 4)
obstruction = Pawn(Player.BLACK)
board.set_piece(obstructing_square2, obstruction)
obstructing_square3 = Square.at(4, 3)
obstruction = Pawn(Player.BLACK)
board.set_piece(obstructing_square3, obstruction)
obstructing_square3 = Square.at(4, 5)
obstruction = Pawn(Player.WHITE)
board.set_piece(obstructing_square3, obstruction)
# Act
moves = rook.get_available_moves(board)
# Assert
assert len(moves) == 2
def test_king_cannot_move_if_piece_in_front():
# Arrange
board = Board.empty()
king = King(Player.WHITE)
king_square = Square.at(4, 4)
board.set_piece(king_square, king)
friend = Pawn(Player.WHITE)
friend_square = Square.at(5, 5)
board.set_piece(friend_square, friend)
friend2 = Pawn(Player.WHITE)
friendly_square2 = Square.at(3, 4)
board.set_piece(friendly_square2, friend2)
enemy = Pawn(Player.BLACK)
enemy_square = Square.at(5, 4)
board.set_piece(enemy_square, enemy)
# Act
moves = king.get_available_moves(board)
# Assert
print(moves)
assert Square.at(5, 5) not in moves
assert Square.at(3, 4) not in moves
assert Square.at(5, 4) in moves
def test_white_knights_can_move_to_all_unoccupied_squares():
# Arrange
board = Board.empty()
knight = Knight(Player.WHITE)
square = Square.at(1, 4)
board.set_piece(square, knight)
enemy1 = Pawn(Player.BLACK)
enemy1_square = Square.at(0, 6)
board.set_piece(enemy1_square, enemy1)
enemy2 = Pawn(Player.WHITE)
enemy2_square = Square.at(2, 6)
board.set_piece(enemy2_square, enemy2)
# Act
moves = knight.get_available_moves(board)
# Assert
assert set(moves) == set([
Square.at(0, 6),
Square.at(0, 2),
Square.at(2, 2),
Square.at(3, 3),
Square.at(3, 5)
])
def _create_starting_board():
# Create an empty board
board = [[None] * BOARD_SIZE for _ in range(BOARD_SIZE)]
# Setup the rows of pawns
board[1] = [Pawn(Player.WHITE) for _ in range(BOARD_SIZE)]
board[6] = [Pawn(Player.BLACK) for _ in range(BOARD_SIZE)]
# Setup the rows of pieces
piece_row = [Rook, Knight, Bishop, Queen, King, Bishop, Knight, Rook]
board[0] = list(map(lambda piece: piece(Player.WHITE), piece_row))
board[7] = list(map(lambda piece: piece(Player.BLACK), piece_row))
return board
def test_black_pawn_cannot_move_two_squares_if_piece_one_in_front():
# Arrange
board = Board.empty()
pawn = Pawn(Player.BLACK)
pawn_square = Square.at(6, 4)
board.set_piece(pawn_square, pawn)
obstructing_square = Square.at(5, 4)
obstruction = Pawn(Player.WHITE)
board.set_piece(obstructing_square, obstruction)
# Act
moves = pawn.get_available_moves(board)
# Assert
assert Square.at(4, 4) not in moves
def test_white_pawn_cannot_move_if_piece_in_front():
# Arrange
board = Board.empty()
pawn = Pawn(Player.WHITE)
pawn_square = Square.at(4, 4)
board.set_piece(pawn_square, pawn)
obstructing_square = Square.at(5, 4)
obstruction = Pawn(Player.BLACK)
board.set_piece(obstructing_square, obstruction)
# Act
moves = pawn.get_available_moves(board)
# Assert
assert len(moves) == 0
def test_white_queen_cannot_move_if_friendly_piece_in_the_way():
# Arrange
board = Board.empty()
queen = Queen(Player.WHITE)
queen_square = Square.at(2, 2)
board.set_piece(queen_square, queen)
obstructing_square1 = Square.at(1, 1)
obstructing_square2 = Square.at(3, 3)
obstructing_square3 = Square.at(1, 3)
obstructing_square4 = Square.at(3, 1)
obstructing_square5 = Square.at(2, 1)
obstructing_square6 = Square.at(2, 3)
obstructing_square7 = Square.at(1, 2)
obstructing_square8 = Square.at(3, 2)
obstruction = Pawn(Player.WHITE)
board.set_piece(obstructing_square1, obstruction)
board.set_piece(obstructing_square2, obstruction)
board.set_piece(obstructing_square3, obstruction)
board.set_piece(obstructing_square4, obstruction)
board.set_piece(obstructing_square5, obstruction)
board.set_piece(obstructing_square6, obstruction)
board.set_piece(obstructing_square7, obstruction)
board.set_piece(obstructing_square8, obstruction)
# Act
moves = queen.get_available_moves(board)
# Assert
assert len(moves) == 0
def test_black_king_cannot_move_if_friendly_piece_in_the_way():
# Arrange
board = Board.empty()
king = King(Player.BLACK)
king_square = Square.at(2, 2)
board.set_piece(king_square, king)
obstructing_square1 = Square.at(1, 1)
obstructing_square2 = Square.at(3, 3)
obstructing_square3 = Square.at(1, 3)
obstructing_square4 = Square.at(3, 1)
obstructing_square5 = Square.at(2, 1)
obstructing_square6 = Square.at(2, 3)
obstructing_square7 = Square.at(1, 2)
obstructing_square8 = Square.at(3, 2)
obstruction = Pawn(Player.BLACK)
board.set_piece(obstructing_square1, obstruction)
board.set_piece(obstructing_square2, obstruction)
board.set_piece(obstructing_square3, obstruction)
board.set_piece(obstructing_square4, obstruction)
board.set_piece(obstructing_square5, obstruction)
board.set_piece(obstructing_square6, obstruction)
board.set_piece(obstructing_square7, obstruction)
board.set_piece(obstructing_square8, obstruction)
# Act
moves = king.get_available_moves(board)
# Assert
assert len(moves) == 0
def testKnightJumping():
board = Board.empty()
knight = Knight(Player.WHITE)
square = Square.at(3, 5)
board.set_piece(square, knight)
for row_delta in range(-1, 1):
for col_delta in range(-1, 1):
if row_delta != 0 or col_delta != 0:
board.set_piece(
Square.at(square.row + row_delta,
square.col + col_delta), Pawn(Player.WHITE))
moves = knight.get_available_moves(board)
# Assert
expected_moves = [
Square.at(4, 7),
Square.at(4, 3),
Square.at(5, 6),
Square.at(5, 4),
Square.at(2, 7),
Square.at(2, 3),
Square.at(1, 6),
Square.at(1, 4)
]
assert len(moves) == len(expected_moves)
assert set(moves) == set(expected_moves)
def test_white_rook_cannot_move_up_if_pawn_is_adjacent():
# Arrange
board = Board.empty()
rook = Rook(Player.WHITE)
square = Square.at(4, 4)
board.set_piece(square, rook)
obstructing_square = Square.at(5, 4)
obstruction = Pawn(Player.WHITE)
board.set_piece(obstructing_square, obstruction)
# Act
moves = rook.get_available_moves(board)
# Assert
assert Square.at(5, 4) not in moves
@staticmethod
def test_white_rook_can_capture():
# Arrange
board = Board.empty()
rook = Rook(Player.WHITE)
square = Square.at(4, 4)
board.set_piece(square, rook)
obstructing_square = Square.at(5, 4)
obstruction = Pawn(Player.BLACK)
board.set_piece(obstructing_square, obstruction)
# Act
moves = rook.get_available_moves(board)
# Assert
assert Square.at(5, 4) in moves
assert Square.at(6, 4) not in moves
def test_white_pawns_cannot_move_diagonally_except_to_capture():
# Arrange
board = Board.empty()
pawn = Pawn(Player.WHITE)
pawn_square = Square.at(3, 4)
board.set_piece(pawn_square, pawn)
friendly = Pawn(Player.WHITE)
friendly_square = Square.at(4, 5)
board.set_piece(friendly_square, friendly)
# Act
moves = pawn.get_available_moves(board)
# Assert
assert Square.at(4, 3) not in moves
assert Square.at(4, 5) not in moves
def test_black_pawns_can_capture_diagonally():
# Arrange
board = Board.empty()
pawn = Pawn(Player.BLACK)
pawn_square = Square.at(3, 4)
board.set_piece(pawn_square, pawn)
friendly = Pawn(Player.BLACK)
friendly_square = Square.at(2, 5)
board.set_piece(friendly_square, friendly)
# Act
moves = pawn.get_available_moves(board)
# Assert
assert Square.at(2, 3) not in moves
assert Square.at(2, 5) not in moves
def test_pawn_can_en_passant():
# Arrange
board = Board.empty()
pawn1 = Pawn(Player.WHITE)
pawn1_square = Square.at(1, 4)
board.set_piece(pawn1_square, pawn1)
pawn1_to_square = Square.at(3, 4)
pawn2 = Pawn(Player.BLACK)
pawn2_square = Square.at(3, 5)
board.set_piece(pawn2_square, pawn2)
# Act
board.move_piece(pawn1_square, pawn1_to_square)
moves = pawn2.get_available_moves(board)
# Assert
assert Square.at(2, 4) in moves
assert Square.at(2, 5) in moves
assert Square.at(2, 6) not in moves
def test_knights_cannot_move_off_board():
# Arrange
board = Board.empty()
knight = Knight(Player.WHITE)
knight_square = Square.at(0, 0)
board.set_piece(knight_square, knight)
friendly_1 = Pawn(Player.WHITE)
friendly_1_square = Square.at(2, 1)
board.set_piece(friendly_1_square, friendly_1)
friendly_2 = Pawn(Player.WHITE)
friendly_2_square = Square.at(1, 2)
board.set_piece(friendly_2_square, friendly_2)
# Act
moves = knight.get_available_moves(board)
# Assert
assert len(moves) == 0
def test_black_pawn_can_be_captured_by_en_pessant():
# Arrange
board = Board.empty()
pawn1 = Pawn(Player.BLACK) # MAKE BLACK PAWN
starting_square1 = Square.at(6, 4)
board.set_piece(starting_square1, pawn1)
pawn2 = Pawn(Player.WHITE) # MAKE WHITE PAWN
starting_square2 = Square.at(4, 3)
board.set_piece(starting_square2, pawn2)
intermediate_square = Square.at(4, 4) # move black pawn
pawn1.move_to(board, intermediate_square)
# Act
moves = pawn2.get_available_moves(board)
# Assert
assert Square.at(5, 4) in moves
def test_white_kings_can_move_to_unoccupied_neighbouring_squares_inside_board(
):
# Arrange
board = Board.empty()
king = King(Player.WHITE)
square = Square.at(7, 0)
board.set_piece(square, king)
enemy1 = Pawn(Player.BLACK)
enemy1_square = Square.at(6, 0)
board.set_piece(enemy1_square, enemy1)
enemy2 = Pawn(Player.WHITE)
enemy2_square = Square.at(6, 1)
board.set_piece(enemy2_square, enemy2)
# Act
moves = king.get_available_moves(board)
# Assert
assert set(moves) == set([Square.at(6, 0), Square.at(7, 1)])
def test_rooks_cannot_move_off_the_board():
# Arrange
board = Board.empty()
rook = Rook(Player.WHITE)
rook_square = Square.at(0, 0)
board.set_piece(rook_square, rook)
friendly_1 = Pawn(Player.WHITE)
friendly_1_square = Square.at(1, 0)
board.set_piece(friendly_1_square, friendly_1)
friendly_2 = Pawn(Player.WHITE)
friendly_2_square = Square.at(0, 1)
board.set_piece(friendly_2_square, friendly_2)
# Act
moves = rook.get_available_moves(board)
# Assert
assert len(moves) == 0
def test_white_pawn_changes_to_queen_when_moved_to_top_of_board():
# Arrange
board = Board.empty()
pawn = Pawn(Player.WHITE)
from_square = Square.at(6, 4)
to_square = Square.at(7, 4)
board.set_piece(from_square, pawn)
board.move_piece(from_square, to_square)
new_queen = board.get_piece(to_square)
# Assert
assert isinstance(new_queen, Queen)
def test_black_pawns_can_capture_diagonally():
# Arrange
board = Board.empty()
pawn = Pawn(Player.BLACK)
pawn_square = Square.at(3, 4)
board.set_piece(pawn_square, pawn)
enemy1 = Pawn(Player.WHITE)
enemy1_square = Square.at(2, 5)
board.set_piece(enemy1_square, enemy1)
enemy2 = Pawn(Player.WHITE)
enemy2_square = Square.at(2, 3)
board.set_piece(enemy2_square, enemy2)
# Act
moves = pawn.get_available_moves(board)
# Assert
assert enemy1_square in moves
assert enemy2_square in moves
def test_black_pawn_can_move_down_two_squares_if_not_moved():
# Arrange
board = Board.empty()
pawn = Pawn(Player.BLACK)
square = Square.at(6, 4)
board.set_piece(square, pawn)
# Act
moves = pawn.get_available_moves(board)
# Assert
assert Square.at(4, 4) in moves
def test_black_pawn_changes_to_queen_when_moved_to_top_of_board():
# Arrange
board = Board.empty()
pawn = Pawn(Player.BLACK)
square = Square.at(1, 4)
board.set_piece(square, pawn)
# Act
moves = pawn.get_available_moves(board)
# Assert
assert len(moves) == 1
def test_white_pawn_cannot_move_at_top_of_board():
# Arrange
board = Board.empty()
pawn = Pawn(Player.WHITE)
square = Square.at(7, 4)
board.set_piece(square, pawn)
# Act
moves = pawn.get_available_moves(board)
# Assert
assert len(moves) == 0
def test_white_pawns_can_move_up_one_square():
# Arrange
board = Board.empty()
pawn = Pawn(Player.WHITE)
square = Square.at(1, 4)
board.set_piece(square, pawn)
# Act
moves = pawn.get_available_moves(board)
# Assert
assert Square.at(2, 4) in moves
def test_black_pawn_cannot_move_at_bottom_of_board():
# Arrange
board = Board.empty()
pawn = Pawn(Player.BLACK)
square = Square.at(0, 4)
board.set_piece(square, pawn)
# Act
moves = pawn.get_available_moves(board)
# Assert
assert len(moves) == 0
def test_kings_can_capture():
# Arrange
board = Board.empty()
king = King(Player.WHITE)
king_square = Square.at(4, 4)
board.set_piece(king_square, king)
enemy_1 = Pawn(Player.BLACK)
enemy_1_square = Square.at(4, 3)
board.set_piece(enemy_1_square, enemy_1)
enemy_2 = Pawn(Player.BLACK)
enemy_2_square = Square.at(3, 4)
board.set_piece(enemy_2_square, enemy_2)
# Act
moves = king.get_available_moves(board)
# Assert
assert Square.at(4, 3) in moves
assert Square.at(3, 4) in moves
def test_white_pawns_reaching_end_row_become_queens():
# Arrange
board = Board.empty()
pawn = Pawn(Player.WHITE)
pawn_square = Square.at(6, 0)
board.set_piece(pawn_square, pawn)
target_square = Square.at(7, 0)
# Act
board.move_piece(pawn_square, target_square)
# Assert
assert isinstance(board.get_piece(target_square), Queen) is True
def test_black_pawns_reaching_end_row_become_queens():
# Arrange
board = Board.empty()
pawn = Pawn(Player.BLACK)
pawn_square = Square.at(1, 0)
board.set_piece(pawn_square, pawn)
target_square = Square.at(0, 0)
# Act
board.current_player = board.current_player.opponent()
board.move_piece(pawn_square, target_square)
# Assert
assert isinstance(board.get_piece(target_square), Queen) is True
def test_king_can_take_enemy_pieces():
# Arrange
board = Board.empty()
king = King(Player.WHITE)
square = Square.at(4,4)
pawn1 = Pawn(Player.BLACK)
pawn2 = Pawn(Player.BLACK)
pawn3 = Pawn(Player.BLACK)
pawn4 = Pawn(Player.BLACK)
pawn5 = Pawn(Player.BLACK)
pawn6 = Pawn(Player.BLACK)
pawn7 = Pawn(Player.BLACK)
pawn8 = Pawn(Player.BLACK)
square1 = Square.at(3, 3)
square2 = Square.at(3, 4)
square3 = Square.at(3, 5)
square4 = Square.at(4, 3)
square5 = Square.at(4, 5)
square6 = Square.at(5, 3)
square7 = Square.at(5, 4)
square8 = Square.at(5, 5)
board.set_piece(square, king)
board.set_piece(square1, pawn1)
board.set_piece(square2, pawn2)
board.set_piece(square3, pawn3)
board.set_piece(square4, pawn4)
board.set_piece(square5, pawn5)
board.set_piece(square6, pawn6)
board.set_piece(square7, pawn7)
board.set_piece(square8, pawn8)
# Act
moves = king.get_available_moves(board)
# Assert
assert Square.at(3, 3) in moves
assert Square.at(3, 4) in moves
assert Square.at(3, 5) in moves
assert Square.at(4, 3) in moves
assert Square.at(4, 5) in moves
assert Square.at(5, 3) in moves
assert Square.at(5, 4) in moves
assert Square.at(5, 5) in moves