test(dropbox): update download failure return shape

surfsense_backend/tests/unit/connector_indexers/test_dropbox_parallel.py

@@ -74,7 +74,7 @@ async def test_single_file_returns_one_connector_document(
     )
 
     assert len(docs) == 1
-    assert failed == 0
+    assert failed == []
     assert docs[0].title == "test.txt"
     assert docs[0].unique_id == "f1"
     assert docs[0].document_type == DocumentType.DROPBOX_FILE
@@ -99,7 +99,7 @@ async def test_multiple_files_all_produce_documents(
     )
 
     assert len(docs) == 3
-    assert failed == 0
+    assert failed == []
     assert {d.unique_id for d in docs} == {"f0", "f1", "f2"}
 
 
@@ -126,7 +126,7 @@ async def test_one_download_exception_does_not_block_others(
     )
 
     assert len(docs) == 2
-    assert failed == 1
+    assert len(failed) == 1
     assert {d.unique_id for d in docs} == {"f0", "f2"}
 
 
@@ -152,7 +152,7 @@ async def test_etl_error_counts_as_download_failure(
     )
 
     assert len(docs) == 1
-    assert failed == 1
+    assert len(failed) == 1
 
 
 # Slice 5: Semaphore bound
@@ -191,7 +191,7 @@ async def test_concurrency_bounded_by_semaphore(
     )
 
     assert len(docs) == 6
-    assert failed == 0
+    assert failed == []
     assert peak <= 2, f"Peak concurrency was {peak}, expected <= 2"
 
 
@@ -230,7 +230,7 @@ async def test_heartbeat_fires_during_parallel_downloads(
     )
 
     assert len(docs) == 3
-    assert failed == 0
+    assert failed == []
     assert len(heartbeat_calls) >= 1, "Heartbeat should have fired at least once"