feat: import mostovik exchange sections

tests/apps/organization/test_services.py

@@ -1,6 +1,7 @@
 """Tests for Organization services."""
 
-from apps.organization.services import OrganizationService
+from apps.organization.models import Organization
+from apps.organization.services import OrganizationNotFoundError, OrganizationService
 from django.test import TestCase
 
 from .factories import OrganizationFactory
@@ -9,15 +10,15 @@ from .factories import OrganizationFactory
 class OrganizationServiceTest(TestCase):
     """Tests for OrganizationService."""
 
-    def test_get_or_create_by_inn_creates_new(self):
-        """Test get_or_create_by_inn creates new organization."""
-        org, created = OrganizationService.get_or_create_by_inn(
-            inn="1234567890",
-            defaults={"name": "Test Org", "ogrn": "1234567890123"},
-        )
-        self.assertTrue(created)
-        self.assertEqual(org.inn, "1234567890")
-        self.assertEqual(org.name, "Test Org")
+    def test_get_or_create_by_inn_rejects_missing_organization(self):
+        """OrganizationService must not create organizations outside exchange import."""
+        with self.assertRaises(OrganizationNotFoundError):
+            OrganizationService.get_or_create_by_inn(
+                inn="1234567890",
+                defaults={"name": "Test Org", "ogrn": "1234567890123"},
+            )
+
+        self.assertEqual(Organization.objects.count(), 0)
 
     def test_get_or_create_by_inn_returns_existing(self):
         """Test get_or_create_by_inn returns existing organization."""