Add organization stats endpoint

tests/apps/registers/test_views.py

@@ -6,7 +6,7 @@ import io
 from datetime import date
 from unittest.mock import patch
 
-from apps.registers.models import Organization, RegistryMembershipPeriod
+from apps.registers.models import Organization, Register, RegistryMembershipPeriod
 from django.core.files.uploadedfile import SimpleUploadedFile
 from django.db import IntegrityError
 from django.urls import reverse
@@ -198,6 +198,55 @@ class RegistersViewsTest(APITestCase):
             "/api/v2/registers/rosatom-goz/upload/",
         )
 
+    def test_stat_organizations_endpoint_returns_registry_cards(self):
+        opk_registry, _ = Register.objects.get_or_create(name="Реестр предприятий ОПК")
+        rosatom_registry, _ = Register.objects.get_or_create(
+            name="Реестр госкорпорации Росатом"
+        )
+        roscosmos_goz_registry, _ = Register.objects.get_or_create(
+            name="Реестр госкорпорации Роскосмос ГОЗ"
+        )
+        opk_organization = OrganizationFactory()
+        shared_organization = OrganizationFactory()
+        inactive_organization = OrganizationFactory()
+        RegistryMembershipPeriodFactory(
+            registry=opk_registry,
+            organization=opk_organization,
+        )
+        RegistryMembershipPeriodFactory(
+            registry=rosatom_registry,
+            organization=opk_organization,
+        )
+        RegistryMembershipPeriodFactory(
+            registry=rosatom_registry,
+            organization=shared_organization,
+        )
+        RegistryMembershipPeriodFactory(
+            registry=roscosmos_goz_registry,
+            organization=inactive_organization,
+            ended_at=date(2026, 6, 1),
+        )
+
+        response = self.client.get("/api/v1/stat/organizations/")
+
+        self.assertEqual(response.status_code, status.HTTP_200_OK)
+        payload = response.data["data"]
+        self.assertEqual(payload["total_organizations"], 3)
+        self.assertEqual(payload["active_registry_organizations"], 2)
+        self.assertEqual(payload["counts"]["total"], 3)
+        self.assertEqual(payload["counts"]["opk"], 1)
+        self.assertEqual(payload["counts"]["rosatom"], 2)
+        self.assertEqual(payload["counts"]["roscosmos-goz"], 0)
+        cards_by_slug = {item["slug"]: item for item in payload["cards"]}
+        self.assertEqual(
+            cards_by_slug["total"]["title"],
+            "Общее количество организаций",
+        )
+        self.assertEqual(
+            cards_by_slug["rosatom"]["registry_name"],
+            "Реестр госкорпорации Росатом",
+        )
+
     def test_v2_registry_slug_upload_does_not_refresh_snapshots_after_import_error(self):
         rows = [
             {