def test_thunking_evaluates_initial_list():
x = Stream([1, 2, 3])
x._thunk_to(1)
assert len(x.fetched) == 1
def test_thunking_evaluates_initial_list():
x = Stream([1, 2, 3])
x._thunk_to(1)
assert len(x.fetched) == 1
def test_thunking_evaluates_initial_list():
x = Stream([1, 2, 3])
x._thunk_to(1)
assert len(x.fetched) == 1
def test_thunking_evaluates_initial_list():
x = Stream([1, 2, 3])
x._thunk_to(1)
assert len(x.fetched) == 1