from fastapi._compat import (
    ModelField,
    Undefined,
    _get_model_config,
    get_cached_model_fields,
    get_model_fields,
    is_bytes_sequence_annotation,
    is_scalar_field,
    is_uploadfile_sequence_annotation,
)
from fastapi.testclient import TestClient
from pydantic import BaseConfig, BaseModel, ConfigDict
from pydantic.fields import FieldInfo

from .utils import needs_pydanticv1, needs_pydanticv2

        for sub_annotation in get_args(annotation)
    )


def is_uploadfile_sequence_annotation(annotation: Any) -> bool:
    origin = get_origin(annotation)
    if origin is Union or origin is UnionType:
        at_least_one = False
        for arg in get_args(annotation):
            if is_uploadfile_sequence_annotation(arg):
                at_least_one = True
                continue

    is_bytes_field,
    is_bytes_sequence_field,
    is_scalar_field,
    is_scalar_sequence_field,
    is_sequence_field,
    is_uploadfile_or_nonable_uploadfile_annotation,
    is_uploadfile_sequence_annotation,
    lenient_issubclass,
    sequence_types,
    serialize_sequence_value,
    value_is_sequence,
)
from fastapi.background import BackgroundTasks
from fastapi.concurrency import (