human
I wrote the below code

    backup = views._status_bar_views
    views._status_bar_views = []
    c = make_logged_in_client()
    views.register_status_bar_view((lambda _: HttpResponse('foo', status=200)))
    views.register_status_bar_view((lambda _: HttpResponse('bar')))
    views.register_status_bar_view((lambda _: None))
    def f(r):
        raise Exception()
    views.register_status_bar_view(f)
    response = c.get('/desktop/status_bar')
    assert_equal('foobar', response.content)
    views._status_bar_views = backup

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

def test_status_bar():