code: def test_read_s3(
      s3: str, function: Callable[..., Any], extension: str
  ) -> None:
      df = function(
          f"s3://bucket/foods1.{extension}",
          storage_options={"endpoint_url": s3},
      )
      assert df.columns == [
          "category",
          "calories",
          "fats_g",
          "sugars_g",
      ]
      assert df.shape == (27, 4)
  
file_path: polars/py-polars/tests/unit/io/cloud/test_aws.py
imports: from __future__ import annotations
  from typing import TYPE_CHECKING, Any, Callable, Iterator
  import boto3
  import pytest
  from moto.server import ThreadedMotoServer
  import polars
label_desc: Use image node_id 4 for calling a global function with example usage: test_read_s3(s3, function, extension) without return types