Fix dangling reference warning location

Author: koxudaxi

src/datamodel_code_generator/parser/jsonschema.py

@@ -10460,7 +10460,7 @@ def _report_parse_diagnostics(self) -> None:
                 f"Unresolved local $ref {ref!r} in {source}: JSON pointer was not found. "
                 "Generated a fallback Any model; use --strict-refs to fail instead.",
                 DanglingRefWarning,
-                stacklevel=3,
+                stacklevel=4,
             )
         self._dangling_refs.clear()
 

tests/data/expected/main/malformed/dangling_ref_warning_location.txt

@@ -0,0 +1 @@
+__init__.py

tests/main/test_error_messages.py

@@ -577,7 +577,7 @@ def test_dangling_local_ref_warns_and_preserves_generated_output(
     capsys: pytest.CaptureFixture[str],
 ) -> None:
     """Default mode warns while retaining the legacy fallback model byte-for-byte."""
-    with pytest.warns(DanglingRefWarning, match=r"Unresolved local \$ref.+dangling_local_ref\.json"):
+    with pytest.warns(DanglingRefWarning, match=r"Unresolved local \$ref.+dangling_local_ref\.json") as warning_records:
         run_main_and_assert(
             input_path=MALFORMED_DATA_PATH / "dangling_local_ref.json",
             output_path=output_file,
@@ -589,6 +589,12 @@ def test_dangling_local_ref_warns_and_preserves_generated_output(
             assert_no_stderr=True,
             importable_module_name="generated_dangling_local_ref",
         )
+    dangling_warnings = [warning for warning in warning_records if warning.category is DanglingRefWarning]
+    assert_warnings_contain(dangling_warnings, "Unresolved local $ref")
+    assert_output(
+        "".join(f"{warning.filename.rsplit('/', 1)[-1]}\n" for warning in dangling_warnings),
+        EXPECTED_MALFORMED_PATH / "dangling_ref_warning_location.txt",
+    )
 
 
 def test_auto_detected_dangling_ref_keeps_source_context_and_generated_output(