def test_an_passant(pawn): # noqa: D103
grid = pawn.grid
p2_pos = pawn.position + Position(0, -1)
grid.add_piece(pieces.Pawn(p2_pos, pawn.color))
grid[p2_pos].previous_positions = [None]
assert pawn.attack_range == get_expected_attack_range(pawn,
left=True,
right=True)
grid[p2_pos].color = pawn.color.inverted()
assert pawn.attack_range == get_expected_attack_range(pawn,
left=True,
right=True)
grid[p2_pos].previous_positions = []
assert pawn.attack_range == get_expected_attack_range(pawn,
left=True,
right=True)
p3_pos = pawn.position + Position(0, 1)
attacked_pos = p3_pos + Position(pawn.get_direction(pawn).value, 0)
grid.add_piece(pieces.Pawn(p3_pos, pawn.color.inverted()))
grid[p3_pos].previous_positions = [None]
other = grid[p3_pos]
assert grid.move(pawn.position, attacked_pos)
assert grid.captured == [other]
def test_attack_range(pawn): # noqa: D103
dir_val = pawn.get_direction(pawn).value
grid = pawn.grid
assert pawn.attack_range == get_expected_attack_range(pawn,
left=True,
right=True)
p2_pos = pawn.position + Position(dir_val, -1)
grid.add_piece(pieces.Pawn(p2_pos, pawn.color))
assert pawn.attack_range == get_expected_attack_range(pawn,
left=False,
right=True)
p3_pos = pawn.position + Position(dir_val, 1)
grid.add_piece(pieces.Pawn(p3_pos, pawn.color))
assert pawn.attack_range == get_expected_attack_range(pawn,
left=False,
right=False)
grid[p2_pos].color = grid[p2_pos].color.inverted()
assert pawn.attack_range == get_expected_attack_range(pawn,
left=True,
right=False)
grid[p3_pos].color = grid[p3_pos].color.inverted()
assert pawn.attack_range == get_expected_attack_range(pawn,
left=True,
right=True)
def test_move_in_check(): # noqa: D103
grid = Grid()
r, f = 1, 1
king = piece_types.King(Position(r, f - 1))
rook = piece_types.Rook(Position(r, f + 1), color=Color.Black)
p1 = piece_types.Pawn(Position(r - 1, f))
p2 = piece_types.Pawn(Position(r - 1, f + 2))
for piece in (king, rook, p1, p2):
grid.add_piece(piece)
assert grid.own_king_in_check(king)
assert not grid.move(p2.position, p2.position + Position(1, 0))
assert grid.move(p1.position, p1.position + Position(1, 0))
assert not grid.own_king_in_check(king)
p1.position += Position(-1, 0)
print(king, p2, rook)
assert grid.own_king_in_check(king)
assert grid.move(p2.position, rook.position)
assert not grid.own_king_in_check(king)
def test_knight_ranges(color, coords, knight): # noqa: D103
knight.position = Position(*coords)
knight.color = color
assert sorted(knight.move_range) == sorted(knight.attack_range)
move_diffs = [(1, 2), (1, -2), (-1, 2), (-1, -2)]
move_diffs += list(map(reversed, move_diffs))
move_diffs = map(lambda x: Position(*x), move_diffs)
moves = map(lambda x: x + knight.position, move_diffs)
moves = list(filter(lambda x: x.is_valid(), moves))
assert sorted(knight.move_range) == sorted(moves)
pos = knight.position + Position(1, 2)
pawn = pieces.Pawn(pos, color=color)
knight.grid.add_piece(pawn)
try:
moves.remove(pawn.position)
except ValueError:
pass
assert sorted(knight.move_range) == sorted(moves)
pawn.color = pawn.color.inverted()
if pawn.position.is_valid():
moves.append(pawn.position)
assert sorted(knight.move_range) == sorted(moves)
def test_castle_piece_between(color, file_letter, grid_castle): # noqa: D103
rank = 1 if color is Color.White else 8
side = Side.Queenside if file_letter in "bcd" else Side.Kingside
pawn = piece_types.Pawn(Position.get_pos(f"{file_letter}{rank}"),
color=color.White)
grid_castle.add_piece(pawn)
assert not grid_castle.castle(color, side)
def test_pawn_range_obstruction(pawn): # noqa: D103
grid = pawn.grid
assert pawn.move_range == get_expected_move_range(pawn, two_positions=True)
p2 = pieces.Pawn(pawn.position + Position(1, 0), pawn.color)
grid.add_piece(p2)
assert pawn.move_range == []
assert grid.move(p2.position, p2.position + Position(1, 0))
assert pawn.move_range == get_expected_move_range(pawn, False)
assert grid.move(p2.position, p2.position + Position(1, 0))
assert pawn.move_range == get_expected_move_range(pawn, True)
pawn.move(pawn.position + Position(1, 0))
assert pawn.move_range == get_expected_move_range(pawn, False)
p3 = pieces.Pawn(pawn.position + Position(2, 0), pawn.color.inverted())
grid.add_piece(p3)
assert pawn.move_range == get_expected_move_range(pawn, False)
assert grid.move(p3.position, p3.position + Position(-1, 0))
assert pawn.move_range == []
def test_revert_move(grid): # noqa: D103
grids = []
p1 = piece_types.Pawn(Position.get_pos("a2"))
p2 = piece_types.Pawn(Position.get_pos("b2"))
grid.add_piece(p1)
grid.add_piece(p2)
assert not grid.revert_move()
grid.move(p1.position, p1.position + Position(2, 0))
grids.append(deepcopy(grid))
grid.move(p2.position, p2.position + Position(1, 0))
grids.append(deepcopy(grid))
grid.move(p1.position, p1.position + Position(1, 0))
grids.append(deepcopy(grid))
grid.move(p2.position, p2.position + Position(1, 0))
assert grids[-1] != grid
while grids:
snapshot = grids.pop()
assert grid.revert_move()
assert grid == snapshot
def pawn(): # noqa: D103
grid = Grid()
pawn = pieces.Pawn(Position(1, 1))
grid.add_piece(pawn)
return pawn
