feat(parsers): implement arbitration and upload fixes

tests/apps/parsers/test_views.py

@@ -5,6 +5,7 @@ from __future__ import annotations
 import io
 import os
 import tempfile
+import zipfile
 from unittest.mock import Mock, patch
 
 from apps.parsers.models import (
@@ -50,6 +51,14 @@ def _build_fns_excel_bytes() -> bytes:
     return buf.getvalue()
 
 
+def _build_fns_zip_bytes(file_map: dict[str, bytes]) -> bytes:
+    buf = io.BytesIO()
+    with zipfile.ZipFile(buf, "w", compression=zipfile.ZIP_DEFLATED) as archive:
+        for file_name, content in file_map.items():
+            archive.writestr(file_name, content)
+    return buf.getvalue()
+
+
 def _create_procurement_record() -> ProcurementRecord:
     return ProcurementRecord.objects.create(
         load_batch=fake.random_int(min=1, max=1000),
@@ -411,6 +420,34 @@ class ParsersViewSetTest(APITestCase):
         self.assertEqual(response.data["success"], True)
         self.assertIn("message", response.data)
 
+    def test_fns_upload_accepts_zip_payload(self):
+        self.client.force_authenticate(self.admin)
+        external_id = _digits(5)
+        ogrn = _digits(13)
+        filename = f"fin_{external_id}_{ogrn}.xlsx"
+        upload = SimpleUploadedFile(
+            "fns_reports.zip",
+            _build_fns_zip_bytes({filename: _build_fns_excel_bytes()}),
+            content_type="application/zip",
+        )
+        with tempfile.TemporaryDirectory() as tmpdir:
+            watch_dir = os.path.join(tmpdir, "watch")
+            processed_dir = os.path.join(tmpdir, "processed")
+            failed_dir = os.path.join(tmpdir, "failed")
+            with self.settings(
+                FNS_WATCH_DIRECTORY=watch_dir,
+                FNS_PROCESSED_DIRECTORY=processed_dir,
+                FNS_FAILED_DIRECTORY=failed_dir,
+            ):
+                url = reverse("api_v1:fns:fns-upload")
+                response = self.client.post(url, {"file": upload}, format="multipart")
+
+        self.assertEqual(response.status_code, status.HTTP_202_ACCEPTED)
+        self.assertEqual(response.data["queued"], 1)
+        self.assertEqual(response.data["skipped"], 0)
+        self.assertEqual(response.data["invalid"], 0)
+        self.assertEqual(FinancialReport.objects.count(), 1)
+
     def test_parsing_settings_get_and_patch(self):
         self.client.force_authenticate(self.admin)
         url = reverse("api_v1:parsing:parsing-settings")