policies: change .form() and .serializer() to properties, add tests

passbook/policies/tests/test_models.py

@@ -0,0 +1,30 @@
+"""flow model tests"""
+from typing import Callable, Type
+
+from django.forms import ModelForm
+from django.test import TestCase
+
+from passbook.lib.utils.reflection import all_subclasses
+from passbook.policies.models import Policy
+
+
+class TestPolicyProperties(TestCase):
+    """Generic model properties tests"""
+
+
+def policy_tester_factory(model: Type[Policy]) -> Callable:
+    """Test a form"""
+
+    def tester(self: TestPolicyProperties):
+        model_inst = model()
+        self.assertTrue(issubclass(model_inst.form, ModelForm))
+
+    return tester
+
+
+for policy_type in all_subclasses(Policy):
+    setattr(
+        TestPolicyProperties,
+        f"test_policy_{policy_type.__name__}",
+        policy_tester_factory(policy_type),
+    )