def test_serialize_sequence_value_with_optional_list():
    """Test that serialize_sequence_value handles optional lists correctly."""
    from fastapi._compat import v2

    field_info = FieldInfo(annotation=Union[list[str], None])
    field = v2.ModelField(name="items", field_info=field_info)
    result = v2.serialize_sequence_value(field=field, value=["a", "b", "c"])
    assert result == ["a", "b", "c"]

from .v2 import is_scalar_field as is_scalar_field
from .v2 import is_scalar_sequence_field as is_scalar_sequence_field
from .v2 import is_sequence_field as is_sequence_field
from .v2 import serialize_sequence_value as serialize_sequence_value
from .v2 import (
    with_info_plain_validator_function as with_info_plain_validator_function,