tests: Fix blank pdf tests to expect no input id

Assisted-by: Codex

Author: datalogics-cgreen

tests/test_blank_pdf.py

@@ -410,7 +410,9 @@ def handler(request: httpx.Request) -> httpx.Response:
     assert output_file.name == "blank.pdf"
     assert output_file.type == "application/pdf"
     assert response.warning is None
-    assert str(response.input_id) == output_id
+    assert response.input_ids == []
+    with pytest.raises(ValueError, match=r"no input id was specified"):
+        _ = response.input_id
 
 
 def test_blank_pdf_request_customization(
@@ -531,7 +533,9 @@ def handler(request: httpx.Request) -> httpx.Response:
     assert isinstance(response, PdfRestFileBasedResponse)
     assert response.output_file.name == "async.pdf"
     assert response.output_file.type == "application/pdf"
-    assert str(response.input_id) == output_id
+    assert response.input_ids == []
+    with pytest.raises(ValueError, match=r"no input id was specified"):
+        _ = response.input_id
 
 
 @pytest.mark.asyncio