def test_tetris_collided_sides():
tetris = Tetris(20, 10)
tetris.new_piece()
tetris.piece.x = tetris.width
assert tetris.collided()
tetris.piece.x = 3
tetris.piece.y = tetris.height
assert tetris.collided()
def test_tetris_move_down():
tetris = Tetris(20, 10)
tetris.new_piece()
tetris.move_down()
assert not tetris.collided()
assert tetris.piece.x == 3
assert tetris.piece.y == 1
def test_tetris_collided_old_pieces():
tetris = Tetris(20, 10)
tetris.new_piece()
piece = tetris.piece
tetris.imprint_piece()
tetris.piece = piece
assert tetris.collided()
def test_tetris_collided_pass():
tetris = Tetris(20, 10)
tetris.new_piece()
assert not tetris.collided()