code: def test_boto_host_specification(tempfile=None):
      # This test relies on a yoh-specific set of credentials to access
      # s3://dandiarchive . Unfortunately it seems that boto (2.49.0-2.1) might
      # have difficulties to establish a proper connection and would blow
      # with
      # The authorization mechanism you have provided is not supported. Please use AWS4-HMAC-SHA256.
      # Some related discussions:
      #   https://github.com/jschneier/django-storages/issues/28 which was closed
      # as superseded by a fix in 2017
      #   https://github.com/jschneier/django-storages/issues/28 .
      # In my case I still needed to resort to the workaround of providing
      # host = 's3.us-east-2.amazonaws.com' to the call.
      #
      # Unfortunately I do not know yet how we could establish such tests without
      # demanding specific credentials. And since we overload HOME for the testing,
      # the only way to run/test this at least when testing on my laptop is:
      credfile = "/home/yoh/.config/datalad/providers/dandi.cfg"
      # Later TODO: manage to reproduce such situation with our dedicated test
      # bucket, and rely on datalad-test-s3 credential
      if not op.exists(credfile):
          raise SkipTest("Test can run only on yoh's setup")
      providers = Providers.from_config_files([credfile])
      with swallow_outputs():
          providers.download(url_dandi1, path=tempfile)
      assert_equal(md5sum(tempfile), "97f4290b2d369816c052607923e372d4")
  
imports: import os
  from unittest.mock import patch
  import pytest
  from ...downloaders.base import DownloadError
  from ...support import path
  from ...support.exceptions import AccessDeniedError
  from ...tests.utils_pytest import SkipTest, assert_equal, assert_raises, integration, skip_if_no_module, skip_if_no_network, swallow_outputs, turtle, use_cassette, with_tempfile, with_testsui
  from ...utils import md5sum
  from ..providers import Providers
  from ..s3 import S3Authenticator, S3Downloader
  from .test_http import check_download_external_url
  from .utils import get_test_providers
label_desc: Use image node_id 6 for calling a global function with example usage: test_boto_host_specification(tempfile) without return types