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

passbook/flows/tests/test_models.py

@@ -0,0 +1,31 @@
+"""flow model tests"""
+from typing import Callable, Type
+
+from django.forms import ModelForm
+from django.test import TestCase
+
+from passbook.flows.models import Stage
+from passbook.flows.stage import StageView
+
+
+class TestStageProperties(TestCase):
+    """Generic model properties tests"""
+
+
+def stage_tester_factory(model: Type[Stage]) -> Callable:
+    """Test a form"""
+
+    def tester(self: TestStageProperties):
+        model_inst = model()
+        self.assertTrue(issubclass(model_inst.form, ModelForm))
+        self.assertTrue(issubclass(model_inst.type, StageView))
+
+    return tester
+
+
+for stage_type in Stage.__subclasses__():
+    setattr(
+        TestStageProperties,
+        f"test_stage_{stage_type.__name__}",
+        stage_tester_factory(stage_type),
+    )