code: def testExpires_setsCruiseControl(self):
      q = wrappers.Request(wtest.EnvironBuilder().get_environ())
      r = http_util.Respond(
          q, "<b>hello world</b>", "text/html", expires=60
      )
      self.assertEqual(
          r.headers.get("Cache-Control"), "private, max-age=60"
      )
  
imports: import gzip
  import io
  import struct
  from unittest import mock
  from werkzeug import test
  from werkzeug import wrappers
  from tensorboard import test
  from tensorboard.backend import http_util
label_desc: Use image node_id 11 for calling the RespondTest obj's underlying member method code with example usage: obj.testExpires_setsCruiseControl() without return types