def test_invariant_scale_shrink(self):
big_square = PointShape([Point(2, 2), Point(2, 4), Point(4, 4), Point(4, 2)])
small_square = PointShape([Point(1, 1), Point(1, 2), Point(2, 2), Point(2, 1)])
big_square.invariant_scale(0.5)
self.assertEqual(big_square, small_square)
def test_invariant_scale_grow(self):
small_square = PointShape([Point(1, 1), Point(1, 2), Point(2, 2), Point(2, 1)])
small_square.invariant_scale(2)
scaled_square = PointShape([Point(2, 2), Point(2, 4), Point(4, 4), Point(4, 2)])
self.assertEqual(scaled_square, small_square)
