def test_remove_add_pass(self):
        """Test ImpactFunc can be added after removing."""
        imp_fun = ImpactFuncSet()
        vulner_1 = ImpactFunc()
        vulner_1.id = 1
        vulner_1.haz_type = 'TC'
        imp_fun.append(vulner_1)
        imp_fun.remove_func()
        self.assertEqual(0, len(imp_fun.get_hazard_types()))
        self.assertEqual(0, len(imp_fun.get_ids()))

        imp_fun.append(vulner_1)
        self.assertEqual(1, len(imp_fun.get_hazard_types()))
        self.assertEqual('TC', imp_fun.get_hazard_types()[0])
        self.assertEqual(1, len(imp_fun.get_ids()))
        self.assertEqual([1], imp_fun.get_ids('TC'))
    def test_get_hazards_pass(self):
        """Test get_hazard_types function."""
        imp_fun = ImpactFuncSet()
        vulner_1 = ImpactFunc()
        vulner_1.id = 1
        vulner_1.haz_type = 'TC'
        imp_fun.append(vulner_1)
        self.assertEqual(1, len(imp_fun.get_hazard_types()))
        self.assertEqual(['TC'], imp_fun.get_hazard_types())

        vulner_2 = ImpactFunc()
        vulner_2.id = 1
        vulner_2.haz_type = 'TC'
        imp_fun.append(vulner_2)
        self.assertEqual(1, len(imp_fun.get_hazard_types()))
        self.assertEqual(['TC'], imp_fun.get_hazard_types())

        vulner_3 = ImpactFunc()
        vulner_3.id = 1
        vulner_3.haz_type = 'FL'
        imp_fun.append(vulner_3)
        self.assertEqual(2, len(imp_fun.get_hazard_types()))
        self.assertIn('TC', imp_fun.get_hazard_types())
        self.assertIn('FL', imp_fun.get_hazard_types())