def test_is_legal_move_true_one_stone():
"""Check that a valid one stone move is legal.
"""
board = Board()
move = [(6, 2, 1), ()]
assert board.is_legal_move(move)
def test_is_empty_space_filled():
"""Check that empty spaces are correctly identified.
"""
board = Board()
board.place_stone(position=(3, 3), colour=1)
assert not board.is_empty_space(position=(3, 3))
def test_is_legal_move_false_two_stones_same_colour():
"""Check that a two stone move is illegal if the stones are the same colour.
"""
board = Board()
move = [(6, 2, 1), (6, 3, 1)]
assert not board.is_legal_move(move)
def test_is_valid_space_valid():
"""Check that a valid space on a base 4 board isn't misclassified as an
invalid space.
"""
board = Board()
assert board.is_valid_space((3, 3))
def test_is_valid_space_out_of_range():
"""Check that a position outside the range of the board array is classified
as invalid.
"""
board = Board()
assert not board.is_valid_space((7, 2))
def test_is_legal_move_true_two_stones():
"""Check that a valid two stone move is legal.
"""
board = Board()
move = [(6, 2, 1), (6, 3, 2)]
assert board.is_legal_move(move)
def test_remove_stone_invalid():
"""Check that the function raises an error when there is no stone to be
removed.
"""
board = Board()
with pytest.raises(AssertionError):
board.remove_stone(position=(3, 3))
def test_empty_spaces_empty():
"""Check that the correct number of empty spaces are returned for an empty
board.
"""
n = 4
board = Board(size=n)
empty_spaces = board.get_empty_spaces()
assert len(empty_spaces) == 3 * n**2 - 3 * n + 1
def test_get_neighbours_center():
"""Check that the correct neighbours are returned for the central position.
"""
board = Board()
expected_neighbours = [(3, 2), (4, 2), (4, 3), (3, 4), (2, 4), (2, 3)]
actual_neighbours = board.get_neighbours(position=(3, 3))
assert len(actual_neighbours) == len(expected_neighbours)
assert set(actual_neighbours) == set(expected_neighbours)
def test_get_neighbours_edge():
"""Check that the correct neighbours are returned for an edge position.
"""
board = Board()
expected_neighbours = [(3, 6), (3, 5), (4, 4), (5, 4)]
actual_neighbours = board.get_neighbours(position=(4, 5))
assert len(actual_neighbours) == len(expected_neighbours)
assert set(actual_neighbours) == set(expected_neighbours)
def test_place_stone_invalid_position():
"""Check that an error is raised if the position is invalid (i.e. lies
outside the board).
"""
n = 4
board = Board(size=n)
with pytest.raises(AssertionError):
position = (0, 0)
board.place_stone(position, colour=1)
def test_is_legal_move_false_one_stone_non_empty_space():
"""Check that a one stone move is illegal if the space is not empty.
"""
board = Board()
# Initialise the board with a stone
board.place_stone((6, 2), colour=1)
move = [(6, 2, 1), ()]
assert not board.is_legal_move(move)
def test_has_legal_moves_some():
"""Check the function correctly returns that there are legal moves when the
board is not.
"""
n = 4
board = Board(size=n)
# Add a stone to the board for good measure
board.board_2d[3, 3] = 1
assert board.has_legal_moves()
def test_empty_spaces_full():
"""Check that the correct number of empty spaces are returned for a
full board.
"""
n = 4
board = Board(size=n)
board.board_2d = np.ones(board.board_2d.shape)
empty_spaces = board.get_empty_spaces()
assert len(empty_spaces) == 0
def test_is_valid_space_invalid():
"""Check that all invalid spaces on a base 4 board are correctly identified
as invalid.
"""
board = Board()
invalid_spaces = [(0, 0), (0, 1), (0, 2), (1, 0), (1, 1), (2, 0), (4, 6),
(5, 5), (5, 6), (6, 4), (6, 5), (6, 6)]
for space in invalid_spaces:
assert not board.is_valid_space(space)
def test_has_legal_moves_none():
"""Check the function correctly returns that there are no legal moves when
the board is full.
"""
n = 4
board = Board(size=n)
# Populate the board with stones of Colour 1
board.board_2d = np.ones(board.board_2d.shape)
assert not board.has_legal_moves()
def test_empty_spaces_partial():
"""Check that the correct number of empty spaces are returned for a
partially filled board.
"""
n = 4
board = Board(size=n)
board.board_2d[3, 3] = 1
empty_spaces = board.get_empty_spaces()
assert len(empty_spaces) == 3 * n**2 - 3 * n
def test_place_stone_valid():
"""Check that place_stone correctly updates the board state when the
placement is valid.
"""
n = 4
board = Board(size=n)
position = (6, 0)
board.place_stone(position, colour=1)
assert board.board_2d[position[1], position[0]] == 1
assert np.count_nonzero(board.board_2d) == 1
def test_is_legal_move_false_two_stones_two_non_empty_spaces():
"""Check that a two stone move is illegal if both of the desired spaces are
not empty.
"""
board = Board()
# Initialise the board with a stone
board.place_stone((6, 2), colour=1)
board.place_stone((6, 3), colour=1)
move = [(6, 2, 1), (6, 3, 2)]
assert not board.is_legal_move(move)
def test_build_move_map():
"""Check that the move map is being built correctly.
"""
board = Board()
# Player 0
moves = board.get_legal_moves(player=0)
assert len(board.move_map_player_0) == len(moves)
assert all([type(v) == int for v in board.move_map_player_0.values()])
assert all([type(k) == tuple for k in board.move_map_player_0.keys()])
# Player 1
moves = board.get_legal_moves(player=1)
assert len(board.move_map_player_1) == len(moves)
assert all([type(v) == int for v in board.move_map_player_1.values()])
assert all([type(k) == tuple for k in board.move_map_player_1.keys()])
def test_get_legal_moves():
"""Check that the function generates all possible moves when the board is
empty.
"""
board = Board()
empty_spaces = board.get_empty_spaces()
legal_moves = board.get_legal_moves(player=0)
for space in empty_spaces:
q, r = space
assert ((q, r, 1), ()) in legal_moves
assert ((q, r, 2), ()) in legal_moves
for (space1, space2) in permutations(empty_spaces, r=2):
assert ((space1[0], space1[1], 1), (space2[0], space2[1],
2)) in legal_moves
def getInitBoard(self):
"""
Returns:
startBoard: The initial game board. Note that this is not the form that
will be passed to the neural network, but the entire board class.
"""
board = Board(self.size, self.score_target)
return board
def test_remove_stone_valid():
"""Check that the function removes a stone from the board (when there is
one present.
"""
board = Board()
board.place_stone(position=(3, 3), colour=1)
board.remove_stone(position=(3, 3))
assert board.is_empty_space(position=(3, 3))
def test_board_default():
"""Test the Board constructor with default parameter values.
"""
board = Board()
assert board.size == 4
assert board.score_target == 15
assert board.captures == [0, 0]
assert board.colours == [(1, 2), (3, 4)]
assert np.all(board.board_2d == 0)
assert board.board_2d.shape == (7, 7)
def test_is_fenced_edge():
"""Check that the function correctly classifies a fenced bloom at the edge
of the board.
"""
board = Board()
# Add a bloom
bloom = [(6, 3), (5, 4)]
for position in bloom:
board.place_stone(position, colour=1)
# Fence the bloom
for position in bloom:
neighbours = board.get_neighbours(position)
for neighbour in neighbours:
if board.is_empty_space(neighbour):
board.place_stone(neighbour, colour=2)
assert board.is_fenced(bloom)
def test_execute_move_no_captures():
"""Check that the function performs correctly for a situation where there
are no captures.
"""
board = Board()
# Initialise the board with some stones
board.place_stone((6, 2), colour=1)
board.place_stone((6, 3), colour=3)
board.place_stone((5, 4), colour=1)
moves = [(5, 3, 3), (4, 4, 4)]
board.execute_move(moves, player=1)
assert board.board_2d[3, 5] == 3
assert board.board_2d[4, 4] == 4
assert board.captures == [0, 0]
def test_execute_move_one_capture():
"""Check that the function performs correctly for a situation where there
is one stone captured.
"""
board = Board()
# Initialise the board with some stones
board.place_stone((6, 2), colour=1)
board.place_stone((6, 3), colour=3)
board.place_stone((5, 4), colour=1)
moves = [(5, 3, 2), (4, 4, 1)]
board.execute_move(moves, player=0)
assert board.board_2d[3, 5] == 2
assert board.board_2d[4, 4] == 1
assert board.captures == [1, 0]
def test_find_bloom_members():
"""Check that the function correctly identifies all members of a bloom.
"""
board = Board()
# Add a bloom
board.place_stone(position=(3, 2), colour=1)
board.place_stone(position=(3, 3), colour=1)
board.place_stone(position=(3, 4), colour=1)
board.place_stone(position=(4, 3), colour=1)
# Add an additional neighbouring stone of a different colour (that is not
# part of the bloom).
board.place_stone(position=(4, 2), colour=2)
expected_bloom = [(3, 2), (3, 3), (3, 4), (4, 3)]
actual_bloom = board.find_bloom_members(bloom=set(),
colour=1,
position=(3, 2))
assert len(actual_bloom) == len(expected_bloom)
assert set(actual_bloom) == set(expected_bloom)
def test_place_stone_invalid_non_empty():
"""Check that an error is raised if the position is already filled.
"""
n = 4
board = Board(size=n)
position = (6, 0)
board.place_stone(position, colour=1)
with pytest.raises(AssertionError):
board.place_stone(position, colour=1)
def test_get_board_3d():
"""Check that the the 2D board representation is successfully converted into
a 3D representation.
"""
board = Board()
# Place a few different colour stones on the board
board.place_stone(position=(3, 0), colour=1)
board.place_stone(position=(6, 0), colour=2)
board.place_stone(position=(0, 6), colour=3)
board.place_stone(position=(3, 6), colour=4)
board_3d = board.get_board_3d()
assert board_3d.shape == (4, 7, 7)
assert np.count_nonzero(board_3d) == 4
assert board_3d[0, 0, 3] == 1
assert board_3d[1, 0, 6] == 1
assert board_3d[2, 6, 0] == 1
assert board_3d[3, 6, 3] == 1
