code: def test_jsonify_aware_datetimes(tz):
      """Test if aware datetime.datetime objects are converted into GMT."""
      tzinfo = FixedOffset(hours=tz[1], name=tz[0])
      dt = datetime.datetime(2017, 1, 1, 12, 34, 56, tzinfo=tzinfo)
      gmt = FixedOffset(hours=0, name="GMT")
      expected = dt.astimezone(gmt).strftime(
          '"%a, %d %b %Y %H:%M:%S %Z"'
      )
      assert flask.json.dumps(dt) == expected
  
imports: import datetime
  import decimal
  import io
  import uuid
  import pytest
  from werkzeug.http import http_date
  import flask
  from flask import json
  from flask.json.provider import DefaultJSONProvider
label_desc: Use image node_id 10 for calling a global function with example usage: test_jsonify_aware_datetimes(tz) without return types