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_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_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_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_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_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_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_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_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_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_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_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
def test_bishop_cannot_move_through_pieces_down_and_left():
# Arrange
board = Board.empty()
bishop = Bishop(Player.WHITE)
bishop_square = Square.at(4, 4)
board.set_piece(bishop_square, bishop)
friendly = Pawn(Player.WHITE)
friendly_square = Square.at(3, 3)
board.set_piece(friendly_square, friendly)
# Act
moves = bishop.get_available_moves(board)
# Assert
assert Square.at(2, 2) not in moves
def test_queens_cannot_move_off_the_board():
# Arrange
board = Board.empty()
queen = Queen(Player.WHITE)
queen_square = Square.at(0, 0)
board.set_piece(queen_square, queen)
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)
friendly_3 = Pawn(Player.WHITE)
friendly_3_square = Square.at(1, 1)
board.set_piece(friendly_3_square, friendly_3)
# Act
moves = queen.get_available_moves(board)
# Assert
assert len(moves) == 0
def test_kings_cannot_move_off_the_board():
# Arrange
board = Board.empty()
king = King(Player.WHITE)
king_square = Square.at(0, 0)
board.set_piece(king_square, king)
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)
friendly_3 = Pawn(Player.WHITE)
friendly_3_square = Square.at(1, 1)
board.set_piece(friendly_3_square, friendly_3)
# Act
moves = king.get_available_moves(board)
# Assert
assert len(moves) == 0
def test_white_queens_can_move_to_all_unoccupied_squares():
# Arrange
board = Board.empty()
queen = Queen(Player.WHITE)
square = Square.at(1, 4)
board.set_piece(square, queen)
team1 = Pawn(Player.WHITE)
team1_square = Square.at(2, 5)
board.set_piece(team1_square, team1)
enemy1 = Pawn(Player.BLACK)
enemy1_square = Square.at(3, 4)
board.set_piece(enemy1_square, enemy1)
# Act
moves = queen.get_available_moves(board)
# Assert
assert set(moves) == set([
Square.at(0, 3),
Square.at(0, 4),
Square.at(0, 5),
Square.at(1, 0),
Square.at(1, 1),
Square.at(1, 2),
Square.at(1, 3),
Square.at(1, 5),
Square.at(1, 6),
Square.at(1, 7),
Square.at(2, 3),
Square.at(2, 4),
Square.at(3, 2),
Square.at(3, 4),
Square.at(4, 1),
Square.at(5, 0)
])
def test_knights_can_capture():
# Arrange
board = Board.empty()
knight = Knight(Player.WHITE)
knight_square = Square.at(4, 4)
board.set_piece(knight_square, knight)
enemy = Pawn(Player.BLACK)
enemy_square = Square.at(6, 5)
board.set_piece(enemy_square, enemy)
# Act
moves = knight.get_available_moves(board)
# Assert
assert Square.at(6, 5) in moves
def test_rooks_cannot_move_left_through_pieces():
# Arrange
board = Board.empty()
rook = Rook(Player.WHITE)
rook_square = Square.at(4, 4)
board.set_piece(rook_square, rook)
enemy_1 = Pawn(Player.BLACK)
enemy_1_square = Square.at(4, 3)
board.set_piece(enemy_1_square, enemy_1)
# Act
moves = rook.get_available_moves(board)
# Assert
assert Square.at(4, 2) not in moves
def test_queens_can_capture_right():
# Arrange
board = Board.empty()
queen = Queen(Player.WHITE)
queen_square = Square.at(4, 4)
board.set_piece(queen_square, queen)
enemy_1 = Pawn(Player.BLACK)
enemy_1_square = Square.at(4, 6)
board.set_piece(enemy_1_square, enemy_1)
# Act
moves = queen.get_available_moves(board)
# Assert
assert Square.at(4, 6) in moves
def test_queens_cannot_move_left_through_pieces():
# Arrange
board = Board.empty()
queen = Queen(Player.WHITE)
queen_square = Square.at(4, 4)
board.set_piece(queen_square, queen)
enemy_1 = Pawn(Player.BLACK)
enemy_1_square = Square.at(4, 3)
board.set_piece(enemy_1_square, enemy_1)
# Act
moves = queen.get_available_moves(board)
# Assert
assert Square.at(4, 2) not in moves
def test_kings_cannot_move_to_friendly_square():
# Arrange
board = Board.empty()
king = King(Player.WHITE)
king_square = Square.at(4, 4)
board.set_piece(king_square, king)
friendly_1 = Pawn(Player.WHITE)
friendly_1_square = Square.at(4, 3)
board.set_piece(friendly_1_square, friendly_1)
# Act
moves = king.get_available_moves(board)
# Assert
assert Square.at(4, 3) not in moves
def test_bishop_cannot_capture_friendly_pieces():
# Arrange
board = Board.empty()
bishop = Bishop(Player.WHITE)
square = Square.at(3, 5)
board.set_piece(square, bishop)
friendly = Pawn(Player.WHITE)
friendly_square = Square.at(5, 3)
board.set_piece(friendly_square, friendly)
# Act
moves = bishop.get_available_moves(board)
# Assert
assert friendly_square not in moves
def test_bishop_cannot_move_off_board():
# Arrange
board = Board.empty()
bishop = Bishop(Player.WHITE)
bishop_square = Square.at(0, 0)
board.set_piece(bishop_square, bishop)
friendly = Pawn(Player.WHITE)
friendly_square = Square.at(1, 1)
board.set_piece(friendly_square, friendly)
# Act
moves = bishop.get_available_moves(board)
# Assert
assert len(moves) == 0
def test_bishop_can_capture_down_and_left():
# Arrange
board = Board.empty()
bishop = Bishop(Player.WHITE)
bishop_square = Square.at(4, 4)
board.set_piece(bishop_square, bishop)
enemy = Pawn(Player.BLACK)
enemy_square = Square.at(2, 2)
board.set_piece(enemy_square, enemy)
# Act
moves = bishop.get_available_moves(board)
# Assert
assert Square.at(2, 2) in moves
def test_knight_cannot_move_to_friendly_square():
# Arrange
board = Board.empty()
knight = Knight(Player.WHITE)
knight_square = Square.at(4, 4)
board.set_piece(knight_square, knight)
friendly = Pawn(Player.WHITE)
friendly_square = Square.at(5, 6)
board.set_piece(friendly_square, friendly)
# Act
moves = knight.get_available_moves(board)
# Assert
assert Square.at(5, 6) not in moves
def test_rooks_can_capture_right():
# Arrange
board = Board.empty()
rook = Rook(Player.WHITE)
rook_square = Square.at(4, 4)
board.set_piece(rook_square, rook)
enemy_1 = Pawn(Player.BLACK)
enemy_1_square = Square.at(4, 6)
board.set_piece(enemy_1_square, enemy_1)
# Act
moves = rook.get_available_moves(board)
# Assert
assert Square.at(4, 6) in moves
def test_bishop_is_blocked_by_enemy_pieces():
# Arrange
board = Board.empty()
bishop = Bishop(Player.WHITE)
square = Square.at(3, 5)
board.set_piece(square, bishop)
enemy = Pawn(Player.BLACK)
enemy_square = Square.at(5, 3)
board.set_piece(enemy_square, enemy)
# Act
moves = bishop.get_available_moves(board)
# Assert
assert Square.at(6, 2) not in moves
