def test_castling_queen_side():
g = Game()
g.move(("B", 1), ("A", 3))
g.move(("B", 8), ("A", 6))
g.move(("D", 2), ("D", 3))
g.move(("D", 7), ("D", 6))
g.move(("C", 2), ("C", 3))
g.move(("C", 7), ("C", 6))
g.move(("C", 1), ("D", 2))
g.move(("C", 8), ("D", 7))
g.move(("D", 1), ("C", 2))
g.move(("D", 8), ("C", 7))
g.update_all_pieces()
assert (g.is_legal_move("WHITE", ("E", 1), ("C", 1)))
g.move(("E", 1), ("C", 1))
assert (not g.board.is_empty(("C", 1)))
assert (g.board.piece_at(("C", 1)).piece_type == "King")
assert (not g.board.is_empty(("D", 1)))
assert (g.board.piece_at(("D", 1)).piece_type == "Rook")
## Now have black do the same
assert (g.is_legal_move("BLACK", ("E", 8), ("C", 8)))
g.move(("E", 8), ("C", 8))
assert (not g.board.is_empty(("C", 8)))
assert (g.board.piece_at(("C", 8)).piece_type == "King")
assert (not g.board.is_empty(("D", 8)))
assert (g.board.piece_at(("D", 8)).piece_type == "Rook")
def test_points_queen_escape():
g = Game()
g.clear()
g.add_piece(Pawn("BLACK"), ("C", 3))
g.add_piece(Queen("WHITE"), ("B", 2))
assert (len(g.board.pieces) == 2)
g.update_all_pieces()
player = BestNextPointsPlayer("WHITE")
points = player.potential_points_for_move(g, "WHITE", (("B", 2), ("B", 3)))
assert (points == 9)
def test_points_rook_threaten():
g = Game()
g.clear()
g.add_piece(Pawn("WHITE"), ("A", 3))
g.add_piece(Rook("BLACK"), ("B", 8))
assert (len(g.board.pieces) == 2)
g.next_to_play = "BLACK"
g.update_all_pieces()
player = BestNextPointsPlayer("BLACK")
points = player.potential_points_for_move(g, "BLACK", (("B", 8), ("B", 4)))
assert (points == -5)
def test_checkmate():
g = Game()
g.clear()
g.add_piece(King("BLACK"), ("H", 8))
g.add_piece(Queen("WHITE"), ("G", 7))
g.add_piece(Rook("WHITE"), ("G", 6))
assert (len(g.board.pieces) == 3)
g.update_all_pieces()
g.next_player_turn()
assert (g.is_check("BLACK"))
assert (g.is_checkmate("BLACK"))
def test_promotion():
g = Game()
g.clear()
g.add_piece(Pawn("WHITE"), ("B", 7))
g.add_piece(King("WHITE"), ("E", 1))
g.add_piece(Pawn("BLACK"), ("G", 2))
g.add_piece(King("BLACK"), ("E", 7))
g.update_all_pieces()
assert (g.is_legal_move("WHITE", ("B", 7), ("B", 8)))
g.move(("B", 7), ("B", 8))
assert (g.board.piece_at(("B", 8)).piece_type == "Queen")
g.update_all_pieces()
assert (g.is_legal_move("BLACK", ("G", 2), ("G", 1)))
g.move(("G", 2), ("G", 1))
assert (g.board.piece_at(("G", 1)).piece_type == "Queen")
def test_no_checkmate_king_takes():
"""
Problem seen when game declared checkmate
even though king could have taken the piece
threatening it - check this is fixed.
"""
g = Game()
g.clear()
g.add_piece(King("BLACK"), ("H", 8))
g.add_piece(King("WHITE"), ("E", 1))
g.add_piece(Pawn("WHITE"), ("E", 2))
g.add_piece(Pawn("WHITE"), ("F", 2))
g.add_piece(Queen("BLACK"), ("D", 5))
g.update_all_pieces()
g.next_player_turn()
g.move(("D", 5), ("D", 1))
assert (not g.is_checkmate("WHITE"))
def test_cant_castle_after_moving():
g = Game()
g.move(("G", 1), ("H", 3))
g.move(("G", 8), ("H", 6))
g.move(("E", 2), ("D", 3))
g.move(("E", 7), ("D", 6))
g.move(("F", 1), ("E", 2))
g.move(("F", 8), ("E", 7))
## move white king
g.move(("E", 1), ("F", 1))
## and black rook
g.move(("H", 8), ("G", 8))
## and move both back again
g.move(("F", 1), ("E", 1))
g.move(("G", 8), ("H", 8))
g.update_all_pieces()
assert (not g.is_legal_move("WHITE", ("E", 1), ("G", 1)))
## Now have black do the same
assert (not g.is_legal_move("BLACK", ("E", 8), ("G", 8)))