'Unknown trigger rules should cause this dep to fail'

def test_unknown_tr(self):

    ti = self._get_task_instance()
    ti.task.trigger_rule = 'Unknown    Trigger    Rule'
    dep_statuses = tuple(TriggerRuleDep()._evaluate_trigger_rule(ti=ti, successes=1, skipped=0, failed=0, upstream_failed=0, done=1, flag_upstream_failed=False, session='Fake    Session'))
    self.assertEqual(len(dep_statuses), 1)
    self.assertFalse(dep_statuses[0].passed)
