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_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_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_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_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)