'Learners should use their default preprocessors unless custom
preprocessors were passed in to the constructor'

def test_uses_default_preprocessors_unless_custom_pps_specified(self):

    learner = DummyLearner()
    self.assertEqual(type(learner).preprocessors, tuple(learner.active_preprocessors), 'Learner    should    use    default    preprocessors,    unless    preprocessors    were    specified    in    init')
