Mas testing

src-ui/package.json

@@ -11,17 +11,17 @@
   },
   "private": true,
   "dependencies": {
-    "@angular/cdk": "^21.0.5",
-    "@angular/common": "~21.0.6",
-    "@angular/compiler": "~21.0.6",
-    "@angular/core": "~21.0.6",
-    "@angular/forms": "~21.0.6",
-    "@angular/localize": "~21.0.6",
-    "@angular/platform-browser": "~21.0.6",
-    "@angular/platform-browser-dynamic": "~21.0.6",
-    "@angular/router": "~21.0.6",
-    "@ng-bootstrap/ng-bootstrap": "^20.0.0",
-    "@ng-select/ng-select": "^21.1.3",
+    "@angular/cdk": "^20.2.13",
+    "@angular/common": "~20.3.15",
+    "@angular/compiler": "~20.3.15",
+    "@angular/core": "~20.3.15",
+    "@angular/forms": "~20.3.15",
+    "@angular/localize": "~20.3.15",
+    "@angular/platform-browser": "~20.3.15",
+    "@angular/platform-browser-dynamic": "~20.3.15",
+    "@angular/router": "~20.3.15",
+    "@ng-bootstrap/ng-bootstrap": "^19.0.1",
+    "@ng-select/ng-select": "^20.7.0",
     "@ngneat/dirty-check-forms": "^3.0.3",
     "@popperjs/core": "^2.11.8",
     "bootstrap": "^5.3.8",
@@ -30,8 +30,8 @@
     "ng2-pdf-viewer": "^10.4.0",
     "ngx-bootstrap-icons": "^1.9.3",
     "ngx-color": "^10.1.0",
-    "ngx-cookie-service": "^21.1.0",
-    "ngx-device-detector": "^11.0.0",
+    "ngx-cookie-service": "^20.1.1",
+    "ngx-device-detector": "^10.1.0",
     "ngx-ui-tour-ng-bootstrap": "^17.0.1",
     "rxjs": "^7.8.2",
     "tslib": "^2.8.1",
@@ -42,16 +42,16 @@
   "devDependencies": {
     "@angular-builders/custom-webpack": "^20.0.0",
     "@angular-builders/jest": "^20.0.0",
-    "@angular-devkit/core": "^21.0.4",
-    "@angular-devkit/schematics": "^21.0.4",
-    "@angular-eslint/builder": "21.1.0",
-    "@angular-eslint/eslint-plugin": "21.1.0",
-    "@angular-eslint/eslint-plugin-template": "21.1.0",
-    "@angular-eslint/schematics": "21.1.0",
-    "@angular-eslint/template-parser": "21.1.0",
-    "@angular/build": "^21.0.4",
-    "@angular/cli": "~21.0.4",
-    "@angular/compiler-cli": "~21.0.6",
+    "@angular-devkit/core": "^20.3.13",
+    "@angular-devkit/schematics": "^20.3.13",
+    "@angular-eslint/builder": "20.6.0",
+    "@angular-eslint/eslint-plugin": "20.6.0",
+    "@angular-eslint/eslint-plugin-template": "20.6.0",
+    "@angular-eslint/schematics": "20.6.0",
+    "@angular-eslint/template-parser": "20.6.0",
+    "@angular/build": "^20.3.13",
+    "@angular/cli": "~20.3.13",
+    "@angular/compiler-cli": "~20.3.15",
     "@codecov/webpack-plugin": "^1.9.1",
     "@playwright/test": "^1.57.0",
     "@types/jest": "^30.0.0",

src/documents/barcodes.py

@@ -16,6 +16,7 @@ from pikepdf import Pdf
 from documents.converters import convert_from_tiff_to_pdf
 from documents.data_models import ConsumableDocument
 from documents.data_models import DocumentMetadataOverrides
+from documents.models import Document
 from documents.models import Tag
 from documents.plugins.base import ConsumeTaskPlugin
 from documents.plugins.base import StopConsumeTaskError
@@ -115,6 +116,24 @@ class BarcodePlugin(ConsumeTaskPlugin):
         self._tiff_conversion_done = False
         self.barcodes: list[Barcode] = []
 
+    def _apply_detected_asn(self, detected_asn: int) -> None:
+        """
+        Apply a detected ASN to metadata if allowed.
+        """
+        if (
+            self.metadata.skip_asn_if_exists
+            and Document.global_objects.filter(
+                archive_serial_number=detected_asn,
+            ).exists()
+        ):
+            logger.info(
+                f"Found ASN in barcode {detected_asn} but skipping because it already exists.",
+            )
+            return
+
+        logger.info(f"Found ASN in barcode: {detected_asn}")
+        self.metadata.asn = detected_asn
+
     def run(self) -> None:
         # Some operations may use PIL, override pixel setting if needed
         maybe_override_pixel_limit()
@@ -186,13 +205,8 @@ class BarcodePlugin(ConsumeTaskPlugin):
 
         # Update/overwrite an ASN if possible
         # After splitting, as otherwise each split document gets the same ASN
-        if (
-            self.settings.barcode_enable_asn
-            and not self.metadata.skip_asn
-            and (located_asn := self.asn) is not None
-        ):
-            logger.info(f"Found ASN in barcode: {located_asn}")
-            self.metadata.asn = located_asn
+        if self.settings.barcode_enable_asn and (located_asn := self.asn) is not None:
+            self._apply_detected_asn(located_asn)
 
     def cleanup(self) -> None:
         self.temp_dir.cleanup()

src/documents/bulk_edit.py

@@ -7,7 +7,6 @@ from pathlib import Path
 from typing import TYPE_CHECKING
 from typing import Literal
 
-from celery import chain
 from celery import chord
 from celery import group
 from celery import shared_task
@@ -38,6 +37,42 @@ if TYPE_CHECKING:
 logger: logging.Logger = logging.getLogger("paperless.bulk_edit")
 
 
+@shared_task(bind=True)
+def restore_archive_serial_numbers_task(
+    self,
+    backup: dict[int, int],
+    *args,
+    **kwargs,
+) -> None:
+    restore_archive_serial_numbers(backup)
+
+
+def release_archive_serial_numbers(doc_ids: list[int]) -> dict[int, int]:
+    """
+    Clears ASNs on documents that are about to be replaced so new documents
+    can be assigned ASNs without uniqueness collisions. Returns a backup map
+    of doc_id -> previous ASN for potential restoration.
+    """
+    qs = Document.objects.filter(
+        id__in=doc_ids,
+        archive_serial_number__isnull=False,
+    ).only("pk", "archive_serial_number")
+    backup = dict(qs.values_list("pk", "archive_serial_number"))
+    qs.update(archive_serial_number=None)
+    logger.info(f"Released archive serial numbers for documents {list(backup.keys())}")
+    return backup
+
+
+def restore_archive_serial_numbers(backup: dict[int, int]) -> None:
+    """
+    Restores ASNs using the provided backup map, intended for
+    rollback when replacement consumption fails.
+    """
+    for doc_id, asn in backup.items():
+        Document.objects.filter(pk=doc_id).update(archive_serial_number=asn)
+    logger.info(f"Restored archive serial numbers for documents {list(backup.keys())}")
+
+
 def set_correspondent(
     doc_ids: list[int],
     correspondent: Correspondent,
@@ -386,6 +421,7 @@ def merge(
 
     merged_pdf = pikepdf.new()
     version: str = merged_pdf.pdf_version
+    handoff_asn: int | None = None
     # use doc_ids to preserve order
     for doc_id in doc_ids:
         doc = qs.get(id=doc_id)
@@ -401,6 +437,8 @@ def merge(
                 version = max(version, pdf.pdf_version)
                 merged_pdf.pages.extend(pdf.pages)
             affected_docs.append(doc.id)
+            if handoff_asn is None and doc.archive_serial_number is not None:
+                handoff_asn = doc.archive_serial_number
         except Exception as e:
             logger.exception(
                 f"Error merging document {doc.id}, it will not be included in the merge: {e}",
@@ -426,6 +464,8 @@ def merge(
                 DocumentMetadataOverrides.from_document(metadata_document)
             )
             overrides.title = metadata_document.title + " (merged)"
+            if metadata_document.archive_serial_number is not None:
+                handoff_asn = metadata_document.archive_serial_number
         else:
             overrides = DocumentMetadataOverrides()
     else:
@@ -433,8 +473,11 @@ def merge(
 
     if user is not None:
         overrides.owner_id = user.id
-    # Avoid copying or detecting ASN from merged PDFs to prevent collision
-    overrides.skip_asn = True
+    if not delete_originals:
+        overrides.skip_asn_if_exists = True
+
+    if delete_originals and handoff_asn is not None:
+        overrides.asn = handoff_asn
 
     logger.info("Adding merged document to the task queue.")
 
@@ -447,12 +490,20 @@ def merge(
     )
 
     if delete_originals:
+        backup = release_archive_serial_numbers(affected_docs)
         logger.info(
             "Queueing removal of original documents after consumption of merged document",
         )
-        chain(consume_task, delete.si(affected_docs)).delay()
-    else:
-        consume_task.delay()
+        try:
+            consume_task.apply_async(
+                link=[delete.si(affected_docs)],
+                link_error=[restore_archive_serial_numbers_task.s(backup)],
+            )
+        except Exception:
+            restore_archive_serial_numbers(backup)
+            raise
+        else:
+            consume_task.delay()
 
     return "OK"
 
@@ -494,6 +545,8 @@ def split(
                 overrides.title = f"{doc.title} (split {idx + 1})"
                 if user is not None:
                     overrides.owner_id = user.id
+                if not delete_originals:
+                    overrides.skip_asn_if_exists = True
                 logger.info(
                     f"Adding split document with pages {split_doc} to the task queue.",
                 )
@@ -508,10 +561,20 @@ def split(
                 )
 
             if delete_originals:
+                backup = release_archive_serial_numbers([doc.id])
                 logger.info(
                     "Queueing removal of original document after consumption of the split documents",
                 )
-                chord(header=consume_tasks, body=delete.si([doc.id])).delay()
+                try:
+                    chord(
+                        header=consume_tasks,
+                        body=delete.si([doc.id]),
+                    ).apply_async(
+                        link_error=[restore_archive_serial_numbers_task.s(backup)],
+                    )
+                except Exception:
+                    restore_archive_serial_numbers(backup)
+                    raise
             else:
                 group(consume_tasks).delay()
 
@@ -614,7 +677,10 @@ def edit_pdf(
             )
             if user is not None:
                 overrides.owner_id = user.id
-
+            if not delete_original:
+                overrides.skip_asn_if_exists = True
+            if delete_original and len(pdf_docs) == 1:
+                overrides.asn = doc.archive_serial_number
             for idx, pdf in enumerate(pdf_docs, start=1):
                 filepath: Path = (
                     Path(tempfile.mkdtemp(dir=settings.SCRATCH_DIR))
@@ -633,7 +699,17 @@ def edit_pdf(
                 )
 
             if delete_original:
-                chord(header=consume_tasks, body=delete.si([doc.id])).delay()
+                backup = release_archive_serial_numbers([doc.id])
+                try:
+                    chord(
+                        header=consume_tasks,
+                        body=delete.si([doc.id]),
+                    ).apply_async(
+                        link_error=[restore_archive_serial_numbers_task.s(backup)],
+                    )
+                except Exception:
+                    restore_archive_serial_numbers(backup)
+                    raise
             else:
                 group(consume_tasks).delay()
 

src/documents/consumer.py

@@ -696,7 +696,7 @@ class ConsumerPlugin(
                 pk=self.metadata.storage_path_id,
             )
 
-        if self.metadata.asn is not None and not self.metadata.skip_asn:
+        if self.metadata.asn is not None:
             document.archive_serial_number = self.metadata.asn
 
         if self.metadata.owner_id:
@@ -812,8 +812,8 @@ class ConsumerPreflightPlugin(
         """
         Check that if override_asn is given, it is unique and within a valid range
         """
-        if self.metadata.skip_asn or self.metadata.asn is None:
-            # if skip is set or ASN is None
+        if self.metadata.asn is None:
+            # if ASN is None
             return
         # Validate the range is above zero and less than uint32_t max
         # otherwise, Whoosh can't handle it in the index

src/documents/data_models.py

@@ -30,7 +30,7 @@ class DocumentMetadataOverrides:
     change_users: list[int] | None = None
     change_groups: list[int] | None = None
     custom_fields: dict | None = None
-    skip_asn: bool = False
+    skip_asn_if_exists: bool = False
 
     def update(self, other: "DocumentMetadataOverrides") -> "DocumentMetadataOverrides":
         """
@@ -50,8 +50,8 @@ class DocumentMetadataOverrides:
             self.storage_path_id = other.storage_path_id
         if other.owner_id is not None:
             self.owner_id = other.owner_id
-        if other.skip_asn:
-            self.skip_asn = True
+        if other.skip_asn_if_exists:
+            self.skip_asn_if_exists = True
 
         # merge
         if self.tag_ids is None:

src/documents/tests/test_bulk_edit.py

@@ -602,23 +602,21 @@ class TestPDFActions(DirectoriesMixin, TestCase):
             expected_filename,
         )
         self.assertEqual(consume_file_args[1].title, None)
-        self.assertTrue(consume_file_args[1].skip_asn)
+        # No metadata_document_id, delete_originals False, so ASN should be None
+        self.assertIsNone(consume_file_args[1].asn)
 
         # With metadata_document_id overrides
         result = bulk_edit.merge(doc_ids, metadata_document_id=metadata_document_id)
         consume_file_args, _ = mock_consume_file.call_args
         self.assertEqual(consume_file_args[1].title, "B (merged)")
         self.assertEqual(consume_file_args[1].created, self.doc2.created)
-        self.assertTrue(consume_file_args[1].skip_asn)
 
         self.assertEqual(result, "OK")
 
     @mock.patch("documents.bulk_edit.delete.si")
     @mock.patch("documents.tasks.consume_file.s")
-    @mock.patch("documents.bulk_edit.chain")
     def test_merge_and_delete_originals(
         self,
-        mock_chain,
         mock_consume_file,
         mock_delete_documents,
     ):
@@ -632,6 +630,12 @@ class TestPDFActions(DirectoriesMixin, TestCase):
             - Document deletion task should be called
         """
         doc_ids = [self.doc1.id, self.doc2.id, self.doc3.id]
+        self.doc1.archive_serial_number = 101
+        self.doc2.archive_serial_number = 102
+        self.doc3.archive_serial_number = 103
+        self.doc1.save()
+        self.doc2.save()
+        self.doc3.save()
 
         result = bulk_edit.merge(doc_ids, delete_originals=True)
         self.assertEqual(result, "OK")
@@ -642,7 +646,8 @@ class TestPDFActions(DirectoriesMixin, TestCase):
 
         mock_consume_file.assert_called()
         mock_delete_documents.assert_called()
-        mock_chain.assert_called_once()
+        consume_sig = mock_consume_file.return_value
+        consume_sig.apply_async.assert_called_once()
 
         consume_file_args, _ = mock_consume_file.call_args
         self.assertEqual(
@@ -650,7 +655,7 @@ class TestPDFActions(DirectoriesMixin, TestCase):
             expected_filename,
         )
         self.assertEqual(consume_file_args[1].title, None)
-        self.assertTrue(consume_file_args[1].skip_asn)
+        self.assertEqual(consume_file_args[1].asn, 101)
 
         delete_documents_args, _ = mock_delete_documents.call_args
         self.assertEqual(
@@ -658,6 +663,92 @@ class TestPDFActions(DirectoriesMixin, TestCase):
             doc_ids,
         )
 
+        self.doc1.refresh_from_db()
+        self.doc2.refresh_from_db()
+        self.doc3.refresh_from_db()
+        self.assertIsNone(self.doc1.archive_serial_number)
+        self.assertIsNone(self.doc2.archive_serial_number)
+        self.assertIsNone(self.doc3.archive_serial_number)
+
+    @mock.patch("documents.bulk_edit.delete.si")
+    @mock.patch("documents.tasks.consume_file.s")
+    def test_merge_and_delete_originals_restore_on_failure(
+        self,
+        mock_consume_file,
+        mock_delete_documents,
+    ):
+        """
+        GIVEN:
+            - Existing documents
+        WHEN:
+            - Merge action with deleting documents is called with 1 document
+            - Error occurs when queuing consume file task
+        THEN:
+            - Archive serial numbers are restored
+        """
+        doc_ids = [self.doc1.id]
+        self.doc1.archive_serial_number = 111
+        self.doc1.save()
+        sig = mock.Mock()
+        sig.apply_async.side_effect = Exception("boom")
+        mock_consume_file.return_value = sig
+
+        with self.assertRaises(Exception):
+            bulk_edit.merge(doc_ids, delete_originals=True)
+
+        self.doc1.refresh_from_db()
+        self.assertEqual(self.doc1.archive_serial_number, 111)
+
+    @mock.patch("documents.bulk_edit.delete.si")
+    @mock.patch("documents.tasks.consume_file.s")
+    def test_merge_and_delete_originals_metadata_handoff(
+        self,
+        mock_consume_file,
+        mock_delete_documents,
+    ):
+        """
+        GIVEN:
+            - Existing documents with ASNs
+        WHEN:
+            - Merge with delete_originals=True and metadata_document_id set
+        THEN:
+            - Handoff ASN uses metadata document ASN
+        """
+        doc_ids = [self.doc1.id, self.doc2.id]
+        self.doc1.archive_serial_number = 101
+        self.doc2.archive_serial_number = 202
+        self.doc1.save()
+        self.doc2.save()
+
+        result = bulk_edit.merge(
+            doc_ids,
+            metadata_document_id=self.doc2.id,
+            delete_originals=True,
+        )
+        self.assertEqual(result, "OK")
+
+        consume_file_args, _ = mock_consume_file.call_args
+        self.assertEqual(consume_file_args[1].asn, 202)
+
+    def test_restore_archive_serial_numbers_task(self):
+        """
+        GIVEN:
+            - Existing document with no archive serial number
+        WHEN:
+            - Restore archive serial number task is called with backup data
+        THEN:
+            - Document archive serial number is restored
+        """
+        self.doc1.archive_serial_number = 444
+        self.doc1.save()
+        Document.objects.filter(pk=self.doc1.id).update(archive_serial_number=None)
+
+        backup = {self.doc1.id: 444}
+        bulk_edit.restore_archive_serial_numbers_task(backup)
+
+        self.doc1.refresh_from_db()
+        self.assertEqual(self.doc1.archive_serial_number, 444)
+
     @mock.patch("documents.tasks.consume_file.s")
     def test_merge_with_archive_fallback(self, mock_consume_file):
         """
@@ -726,6 +817,7 @@ class TestPDFActions(DirectoriesMixin, TestCase):
         self.assertEqual(mock_consume_file.call_count, 2)
         consume_file_args, _ = mock_consume_file.call_args
         self.assertEqual(consume_file_args[1].title, "B (split 2)")
+        self.assertIsNone(consume_file_args[1].asn)
 
         self.assertEqual(result, "OK")
 
@@ -750,6 +842,8 @@ class TestPDFActions(DirectoriesMixin, TestCase):
         """
         doc_ids = [self.doc2.id]
         pages = [[1, 2], [3]]
+        self.doc2.archive_serial_number = 200
+        self.doc2.save()
 
         result = bulk_edit.split(doc_ids, pages, delete_originals=True)
         self.assertEqual(result, "OK")
@@ -767,6 +861,42 @@ class TestPDFActions(DirectoriesMixin, TestCase):
             doc_ids,
         )
 
+        self.doc2.refresh_from_db()
+        self.assertIsNone(self.doc2.archive_serial_number)
+
+    @mock.patch("documents.bulk_edit.delete.si")
+    @mock.patch("documents.tasks.consume_file.s")
+    @mock.patch("documents.bulk_edit.chord")
+    def test_split_restore_on_failure(
+        self,
+        mock_chord,
+        mock_consume_file,
+        mock_delete_documents,
+    ):
+        """
+        GIVEN:
+            - Existing documents
+        WHEN:
+            - Split action with deleting documents is called with 1 document and 2 page groups
+            - Error occurs when queuing chord task
+        THEN:
+            - Archive serial numbers are restored
+        """
+        doc_ids = [self.doc2.id]
+        pages = [[1, 2]]
+        self.doc2.archive_serial_number = 222
+        self.doc2.save()
+
+        sig = mock.Mock()
+        sig.apply_async.side_effect = Exception("boom")
+        mock_chord.return_value = sig
+
+        result = bulk_edit.split(doc_ids, pages, delete_originals=True)
+        self.assertEqual(result, "OK")
+
+        self.doc2.refresh_from_db()
+        self.assertEqual(self.doc2.archive_serial_number, 222)
+
     @mock.patch("documents.tasks.consume_file.delay")
     @mock.patch("pikepdf.Pdf.save")
     def test_split_with_errors(self, mock_save_pdf, mock_consume_file):
@@ -967,10 +1097,49 @@ class TestPDFActions(DirectoriesMixin, TestCase):
         mock_chord.return_value.delay.return_value = None
         doc_ids = [self.doc2.id]
         operations = [{"page": 1}, {"page": 2}]
+        self.doc2.archive_serial_number = 250
+        self.doc2.save()
 
         result = bulk_edit.edit_pdf(doc_ids, operations, delete_original=True)
         self.assertEqual(result, "OK")
         mock_chord.assert_called_once()
+        consume_file_args, _ = mock_consume_file.call_args
+        self.assertEqual(consume_file_args[1].asn, 250)
+        self.doc2.refresh_from_db()
+        self.assertIsNone(self.doc2.archive_serial_number)
+
+    @mock.patch("documents.bulk_edit.delete.si")
+    @mock.patch("documents.tasks.consume_file.s")
+    @mock.patch("documents.bulk_edit.chord")
+    def test_edit_pdf_restore_on_failure(
+        self,
+        mock_chord,
+        mock_consume_file,
+        mock_delete_documents,
+    ):
+        """
+        GIVEN:
+            - Existing document
+        WHEN:
+            - edit_pdf is called with delete_original=True
+            - Error occurs when queuing chord task
+        THEN:
+            - Archive serial numbers are restored
+        """
+        doc_ids = [self.doc2.id]
+        operations = [{"page": 1}]
+        self.doc2.archive_serial_number = 333
+        self.doc2.save()
+
+        sig = mock.Mock()
+        sig.apply_async.side_effect = Exception("boom")
+        mock_chord.return_value = sig
+
+        with self.assertRaises(Exception):
+            bulk_edit.edit_pdf(doc_ids, operations, delete_original=True)
+
+        self.doc2.refresh_from_db()
+        self.assertEqual(self.doc2.archive_serial_number, 333)
 
     @mock.patch("documents.tasks.update_document_content_maybe_archive_file.delay")
     def test_edit_pdf_with_update_document(self, mock_update_document):

src/documents/tests/test_consumer.py

@@ -14,6 +14,7 @@ from django.test import override_settings
 from django.utils import timezone
 from guardian.core import ObjectPermissionChecker
 
+from documents.barcodes import BarcodePlugin
 from documents.consumer import ConsumerError
 from documents.data_models import DocumentMetadataOverrides
 from documents.data_models import DocumentSource
@@ -412,14 +413,6 @@ class TestConsumer(
         self.assertEqual(document.archive_serial_number, 123)
         self._assert_first_last_send_progress()
 
-    def testMetadataOverridesSkipAsnPropagation(self):
-        overrides = DocumentMetadataOverrides()
-        incoming = DocumentMetadataOverrides(skip_asn=True)
-
-        overrides.update(incoming)
-
-        self.assertTrue(overrides.skip_asn)
-
     def testOverrideTitlePlaceholders(self):
         c = Correspondent.objects.create(name="Correspondent Name")
         dt = DocumentType.objects.create(name="DocType Name")
@@ -1240,3 +1233,46 @@ class PostConsumeTestCase(DirectoriesMixin, GetConsumerMixin, TestCase):
                         r"sample\.pdf: Error while executing post-consume script: Command '\[.*\]' returned non-zero exit status \d+\.",
                     ):
                         consumer.run_post_consume_script(doc)
+
+
+class TestMetadataOverrides(TestCase):
+    def test_update_skip_asn_if_exists(self):
+        base = DocumentMetadataOverrides()
+        incoming = DocumentMetadataOverrides(skip_asn_if_exists=True)
+        base.update(incoming)
+        self.assertTrue(base.skip_asn_if_exists)
+
+
+class TestBarcodeApplyDetectedASN(TestCase):
+    """
+    GIVEN:
+        - Existing Documents with ASN 123
+    WHEN:
+        - A BarcodePlugin which detected an ASN
+    THEN:
+        - If skip_asn_if_exists is set, and ASN exists, do not set ASN
+        - If skip_asn_if_exists is set, and ASN does not exist, set ASN
+    """
+
+    def test_apply_detected_asn_skips_existing_when_flag_set(self):
+        doc = Document.objects.create(
+            checksum="X1",
+            title="D1",
+            archive_serial_number=123,
+        )
+        metadata = DocumentMetadataOverrides(skip_asn_if_exists=True)
+        plugin = BarcodePlugin(
+            input_doc=mock.Mock(),
+            metadata=metadata,
+            status_mgr=mock.Mock(),
+            base_tmp_dir=tempfile.gettempdir(),
+            task_id="test-task",
+        )
+
+        plugin._apply_detected_asn(123)
+        self.assertIsNone(plugin.metadata.asn)
+
+        doc.hard_delete()
+
+        plugin._apply_detected_asn(123)
+        self.assertEqual(plugin.metadata.asn, 123)