'Unhelpful articles in current but not in old works'

def test_current_articles_not_in_old(self):

    r = _make_backdated_revision(90)
    for x in range(0, 3):
        _add_vote_in_past(r, 0, 3)
    for x in range(0, 2):
        _add_vote_in_past(r, 1, 3)
    old_data = {}
    result = _get_current_unhelpful(old_data)
    eq_(1, len(result))
    self.assertAlmostEqual(0.4, result[r.document.id]['currperc'])
    self.assertAlmostEqual(0, result[r.document.id]['diffperc'])
    eq_(5, result[r.document.id]['total'])
