assert isinstance(result, list)


@needs_py310
def test_serialize_sequence_value_with_optional_list_pipe_union():
    """Test that serialize_sequence_value handles optional lists correctly (with new syntax)."""
    from fastapi._compat import v2

    field_info = FieldInfo(annotation=list[str] | None)
    field = v2.ModelField(name="items", field_info=field_info)

### Refactors

* ♻️ Upgrade internal syntax to Python 3.9+ 🎉. PR [#14564](https://github.com/fastapi/fastapi/pull/14564) by [@tiangolo](https://github.com/tiangolo).

### Docs