def demo_shrooms(self, levels=6):
path = systems.shroom_fractal(levels)
koopa = draw.KoopaTroopa(position=(-360,-150), step=3, heading=330)
koopa.add_mappings({'a':'draw', 'b':'draw'})
koopa.hideturtle()
return koopa, path
def test_shroom_fractal(self):
expected = 'a-b+a+b+a-b-a-b+a-b+a-b-a-b+a+b+a-b'
self.assertEqual(expected, systems.shroom_fractal(2))
