fix manual parser refresh reliability

tests/apps/parsers/test_proverki_client.py

@@ -9,6 +9,7 @@ import tempfile
 import types
 from asyncio import events as asyncio_events
 from pathlib import Path
+from unittest.mock import patch
 from xml.etree import ElementPath as element_path
 from xml.etree import ElementTree as ET
 
@@ -563,6 +564,18 @@ class ProverkiParseXMLTest(SimpleTestCase):
         inspections = client._parse_xml_content(xml)
         self.assertEqual(len(inspections), 1)
 
+    def test_large_xml_streaming_does_not_build_sanitized_string(self):
+        xml = _xml_with_tag("INSPECTION", _inspection_attrs())
+        client = ProverkiClient()
+        client.STREAMING_THRESHOLD_BYTES = 1
+        with patch.object(
+            client,
+            "_sanitize_xml",
+            side_effect=AssertionError("large XML must stay as bytes"),
+        ):
+            inspections = client._parse_xml_content(xml)
+        self.assertEqual(len(inspections), 1)
+
     def test_parse_xml_record_missing_fields_returns_none(self):
         element = ET.fromstring("<INSPECTION />")  # noqa: S314
         client = ProverkiClient()