def test_not_on_board_error():
err_msg = 'To_coordinates not legal board coordidnates'
try:
raise NotOnBoardError(Coords(x='z', y='10'), err_msg)
except NotOnBoardError as err:
assert err.coords == Coords(x='z', y='10')
assert err.message == err_msg
def test_same_from_and_to_coords_raises_exception():
game = Draughts({
'66': Counter(Color.BLACK),
})
with pytest.raises(IllegalMoveError, match=game.SAME_SQUARE):
game.move(Coords(x=6, y=6), Coords(x=6, y=6))
def test_move_raises_error_if_capture_possible_for_piece():
game = Draughts({
'66': Counter(Color.BLACK),
'55': Counter(Color.WHITE),
})
with pytest.raises(IllegalMoveError, match=game.CAPTURE_POSSIBLE):
game.move(Coords(x=6, y=6), Coords(x=7, y=5))
def test_draughts_piece_can_move():
game = Draughts()
game.playing_color = Color.WHITE
assert game.board[5][3] is None
game.move(Coords(x=4, y=2), Coords(x=5, y=3))
assert game.board[4][2] is None
assert game.board[5][3] == Counter(Color.WHITE)
def test_illegal_capture_raises_exception():
game = Draughts({
'00': Counter(Color.WHITE),
})
game.playing_color = Color.WHITE
with pytest.raises(IllegalMoveError, match=game.ILLEGAL_CAPTURE):
game.move(Coords(x=0, y=0), Coords(x=2, y=2))
def test_othello_board_setup():
game = Othello()
expected_board_setup = set([(Color.WHITE, Coords(x=3, y=4)),
(Color.WHITE, Coords(x=4, y=3)),
(Color.BLACK, Coords(x=3, y=3)),
(Color.BLACK, Coords(x=4, y=4))])
actual_board_setup = set((disc.color, disc.coords) for row in game.board
for disc in row if disc)
assert actual_board_setup == expected_board_setup
def test_player_color_swaps_for_each_turn():
game = Othello()
assert game.playing_color == Color.BLACK
game.move(to_coords=Coords(x=5, y=3))
assert game.playing_color == Color.WHITE
game.move(to_coords=Coords(x=5, y=4))
assert game.playing_color == Color.BLACK
def test_crowned_black_piece_can_capture_backwards():
game = Draughts({
'55': Counter(Color.BLACK),
'66': Counter(Color.WHITE),
})
game.board[5][5].crowned = True
game.move(Coords(x=5, y=5), Coords(x=7, y=7))
assert game.board[6][6] is None
assert game.board[7][7] == Counter(Color.BLACK)
def _legal_en_passant(self, to_coords):
if not self.last_move_pawn:
return False
if self.playing_piece == Pawn(Color.WHITE) and to_coords.y == 5:
return Coords(to_coords.x,
to_coords.y - 1) == self.last_move_pawn.coords
if self.playing_piece == Pawn(Color.BLACK) and to_coords.y == 2:
return Coords(to_coords.x,
to_coords.y + 1) == self.last_move_pawn.coords
return False
def test_draughts_piece_can_capture():
game = Draughts({
'00': Counter(Color.WHITE),
'11': Counter(Color.BLACK),
})
game.playing_color = Color.WHITE
game.move(Coords(x=0, y=0), Coords(x=2, y=2))
assert game.board[1][1] is None
assert game.board[2][2] == Counter(Color.WHITE)
def test_move_raises_error_if_capture_possible_for_crowned_piece():
game = Draughts({
'77': Counter(Color.BLACK),
'55': Counter(Color.WHITE),
'64': Counter(Color.BLACK)
})
game.board[6][4].crowned = True
with pytest.raises(IllegalMoveError, match=game.CAPTURE_POSSIBLE):
game.move(Coords(x=7, y=7), Coords(x=6, y=6))
def test_black_can_capture_two_pieces_in_multiple_direction():
game = Draughts({
'66': Counter(Color.BLACK),
'55': Counter(Color.WHITE),
'53': Counter(Color.WHITE),
})
game.move(Coords(x=6, y=6), Coords(x=6, y=2))
assert game.board[5][5] is None
assert game.board[5][3] is None
assert game.board[6][2] == Counter(Color.BLACK)
def test_crowned_white_piece_can_capture_backwards():
game = Draughts({
'22': Counter(Color.WHITE),
'11': Counter(Color.BLACK),
})
game.playing_color = Color.WHITE
game.board[2][2].crowned = True
game.move(Coords(x=2, y=2), Coords(x=0, y=0))
assert game.board[1][1] is None
assert game.board[0][0] == Counter(Color.WHITE)
def test_can_capture_two_pieces_in_multiple_direction():
game = Draughts({
'00': Counter(Color.WHITE),
'11': Counter(Color.BLACK),
'13': Counter(Color.BLACK),
})
game.playing_color = Color.WHITE
game.move(Coords(x=0, y=0), Coords(x=0, y=4))
assert game.board[1][1] is None
assert game.board[1][3] is None
assert game.board[0][4] == Counter(Color.WHITE)
def test_can_capture_two_pieces_in_straight_line():
game = Draughts({
'00': Counter(Color.WHITE),
'11': Counter(Color.BLACK),
'33': Counter(Color.BLACK),
})
game.playing_color = Color.WHITE
game.move(Coords(x=0, y=0), Coords(x=4, y=4))
assert game.board[1][1] is None
assert game.board[3][3] is None
assert game.board[4][4] == Counter(Color.WHITE)
def test_crowned_piece_can_take_two_pieces_and_return_to_same_y_index():
game = Draughts({
'66': Counter(Color.BLACK),
'55': Counter(Color.WHITE),
'35': Counter(Color.WHITE),
})
game.board[6][6].crowned = True
game.move(Coords(x=6, y=6), Coords(x=2, y=6))
assert game.board[5][5] is None
assert game.board[3][5] is None
assert game.board[2][6] == Counter(Color.BLACK)
def test_one_piece_capture_forced_to_make_two_move_capture_if_possible():
game = Draughts({
'66': Counter(Color.BLACK),
'55': Counter(Color.WHITE),
'33': Counter(Color.WHITE),
})
game.move(Coords(x=6, y=6), Coords(x=4, y=4))
assert game.board[6][6] is None
assert game.board[5][5] is None
assert game.board[4][4] is None
assert game.board[3][3] is None
assert game.board[2][2] == Counter(Color.BLACK)
def test_can_capture_three_pieces_in_straight_line():
game = Draughts({
'77': Counter(Color.BLACK),
'66': Counter(Color.WHITE),
'44': Counter(Color.WHITE),
'22': Counter(Color.WHITE),
})
game.move(Coords(x=7, y=7), Coords(x=1, y=1))
assert game.board[6][6] is None
assert game.board[4][4] is None
assert game.board[2][2] is None
assert game.board[1][1] == Counter(Color.BLACK)
def test_black_can_capture_three_pieces_in_multiple_directions_s_shape():
game = Draughts({
'66': Counter(Color.BLACK),
'55': Counter(Color.WHITE),
'53': Counter(Color.WHITE),
'51': Counter(Color.WHITE),
})
game.move(Coords(x=6, y=6), Coords(x=4, y=0))
assert game.board[5][5] is None
assert game.board[5][3] is None
assert game.board[5][1] is None
assert game.board[4][0] == Counter(Color.BLACK)
def test_white_can_capture_three_pieces_in_multiple_directions_l_shape():
game = Draughts({
'60': Counter(Color.WHITE),
'51': Counter(Color.BLACK),
'33': Counter(Color.BLACK),
'35': Counter(Color.BLACK),
})
game.playing_color = Color.WHITE
game.move(Coords(x=6, y=0), Coords(x=4, y=6))
assert game.board[5][1] is None
assert game.board[3][3] is None
assert game.board[3][5] is None
assert game.board[4][6] == Counter(Color.WHITE)
def test_two_extra_captures_forced_if_possible():
game = Draughts({
'66': Counter(Color.BLACK),
'55': Counter(Color.WHITE),
'33': Counter(Color.WHITE),
'11': Counter(Color.WHITE),
})
game.move(Coords(x=6, y=6), Coords(x=4, y=4))
assert game.board[6][6] is None
assert game.board[5][5] is None
assert game.board[3][3] is None
assert game.board[1][1] is None
assert game.board[0][0] == Counter(Color.BLACK)
def test_illegal_disc_placement_raises_exception():
game = Othello()
assert game.playing_color == Color.BLACK
with pytest.raises(IllegalMoveError, match=game.SQUARE_TAKEN):
game.move(to_coords=Coords(x=4, y=4))
with pytest.raises(IllegalMoveError, match=game.ILLEGAL_MOVE):
game.move(to_coords=Coords(x=5, y=4)) # doesn't trap opponent discs
with pytest.raises(IllegalMoveError, match=game.ILLEGAL_MOVE):
game.move(to_coords=Coords(x=7, y=7)) # not next to any discs
assert game.playing_color == Color.BLACK # same color to play
def test_two_piece_capture_force_to_make_three_move_capture_if_possible():
game = Draughts({
'66': Counter(Color.BLACK),
'55': Counter(Color.WHITE),
'33': Counter(Color.WHITE),
'11': Counter(Color.WHITE),
})
game.move(Coords(x=6, y=6), Coords(x=2, y=2))
assert game.board[6][6] is None
assert game.board[5][5] is None
assert game.board[3][3] is None
assert game.board[2][2] is None
assert game.board[1][1] is None
assert game.board[0][0] == Counter(Color.BLACK)
def _empty_square_coords(self):
empty_square_coords = []
for x_idx, row in enumerate(self.board):
for y_idx, disc in enumerate(row):
if not disc:
empty_square_coords.append(Coords(x_idx, y_idx))
return empty_square_coords
def test_player_can_move_detected_correctly():
game = Othello(restore_positions={
'01': Disc(Color.BLACK),
'11': Disc(Color.WHITE),
'22': Disc(Color.BLACK)
})
black_can_move = game._scan_board_for_trapped_discs(Coords(x=0, y=0))
assert black_can_move
def test_can_place_piece_and_trap_an_opponent_disc():
game = Othello()
assert game.board[5][3] is None
assert game.board[4][3].color == Color.WHITE
game.move(to_coords=Coords(x=5, y=3))
assert game.board[5][3].color == Color.BLACK
assert game.board[4][3].color == Color.BLACK
def _castle_coords(self):
if self._white_king_row():
if self._queen_side():
castle_coords = (Coords(x=3, y=0), Coords(x=2, y=0))
if self._king_side():
castle_coords = (Coords(x=5, y=0), Coords(x=6, y=0))
if self._black_king_row():
if self._queen_side():
castle_coords = (Coords(x=3, y=7), Coords(x=2, y=7))
if self._king_side():
castle_coords = (Coords(x=5, y=7), Coords(x=6, y=7))
return castle_coords
def test_winner_declared():
game = Othello(
restore_positions={
'43': Disc(Color.WHITE),
'33': Disc(Color.BLACK),
'77': Disc(Color.WHITE),
})
assert not game.winner
game.move(to_coords=Coords(x=5, y=3))
assert game.winner == Color.BLACK
def test_game_ends_if_both_players_cant_move():
game = Othello(
restore_positions={
'43': Disc(Color.WHITE),
'33': Disc(Color.BLACK),
'77': Disc(Color.WHITE),
})
assert game.playing_color == Color.BLACK
game.move(to_coords=Coords(x=5, y=3))
assert game.winner == Color.BLACK
def test_counters_can_be_crowned():
game = Draughts({
'16': Counter(Color.WHITE),
'11': Counter(Color.BLACK),
})
black_piece = game.board[1][1]
white_piece = game.board[1][6]
assert str(black_piece) == '\u26C2'
assert not black_piece.crowned
game.move(Coords(x=1, y=1), Coords(x=0, y=0))
assert black_piece.crowned
assert str(black_piece) == '\u26C3'
assert str(white_piece) == '\u26C0'
assert not white_piece.crowned
game.move(Coords(x=1, y=6), Coords(x=0, y=7))
assert white_piece.crowned
assert str(white_piece) == '\u26C1'
