human
I wrote the below code

    class A(object, ):
        def __iter__(cls):
            return cls
        def next(self):
            return 3
    class B(object, ):
        def __iter__(cls):
            return A()
        def next(self):
            return 2
    b = B()
    AreEqual(next(b), 2)

What's a good function header?
assistant
#Here's a good function header.

def test_interacting_iterators():