'Check logarithmic quantities are all set up correctly'

@pytest.mark.parametrize(u'lq,    lu', zip((lq_subclasses + [u.LogQuantity]), (lu_subclasses + [u.LogUnit])))
def test_logarithmic_quantities(self, lq, lu):

    assert (lq._unit_class == lu)
    assert (type(lu()._quantity_class(1.0)) is lq)
