def test_add():
add_point_list = [
Point(-1, 0),
Point(+1, 0),
Point(0, -1),
Point(0, +1),
]
for i in range(10):
for j in range(22):
for add_point in add_point_list:
point = Point(i, j)
assert point.add(add_point).equals(
Point(i + add_point.x, j + add_point.y))
def rotate_ccw(self):
"""Rotate the tetromino by 90 degrees, counterclockwise."""
# the point of rotation, relative to the board origin
abs_rotation_pt = self.origin.add(ROTATION_POINTS[self.id])
for i in range(len(self.squares)):
# the square's position relative to the point of rotation
current_square = Point(
self.squares[i].x, self.squares[i].y).subtract(abs_rotation_pt)
# the square's bottom right point, which will be the new
# square origin after the rotation
top_left = current_square.add(Point(0, 1))
# x -> y and y -> -x for rotation about the origin
new_point = Point(-top_left.y, top_left.x).add(abs_rotation_pt)
# replace the old square with the new square
point = Point(int(new_point.x), int(new_point.y))
self.squares[i] = Square(point, self.color)
self.state = self.state.prev()
