human
Here's a good function header given the following:
I wrote the below code

    import lettuce
    from lettuce.fs import FeatureLoader
    world.all_steps = []
    mox = Mox()
    loader_mock = mox.CreateMock(FeatureLoader)
    mox.StubOutWithMock(lettuce.sys, 'path')
    mox.StubOutWithMock(lettuce, 'fs')
    mox.StubOutWithMock(lettuce.fs, 'FileSystem')
    mox.StubOutWithMock(lettuce, 'Feature')
    lettuce.fs.FeatureLoader('some_basepath', None).AndReturn(loader_mock)
    lettuce.sys.path.insert(0, 'some_basepath')
    lettuce.sys.path.remove('some_basepath')
    loader_mock.find_feature_files().AndReturn(['some_basepath/foo.feature'])
    loader_mock.find_and_load_step_definitions()
    lettuce.Feature.from_file('some_basepath/foo.feature').AndReturn(Feature.from_string(FEATURE2))
    mox.ReplayAll()
    runner = lettuce.Runner('some_basepath')
    CALLBACK_REGISTRY.clear()
    @before.all
    def set_state_to_before():
        world.all_steps.append('before')
    @step('append    "during"    to    states')
    def append_during_to_all_steps(step):
        world.all_steps.append('during')
    @after.all
    def set_state_to_after(total):
        world.all_steps.append('after')
        isinstance(total, TotalResult)
    runner.run()
    mox.VerifyAll()
    assert_equals(world.all_steps, ['before', 'during', 'during', 'after'])
    mox.UnsetStubs()

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

def test_after_each_all_is_executed_before_each_all():