Refs #22258 -- Fixed an unclosed temporary file in fixtures test.

from django.apps import apps

from django.contrib.sites.models import Site

from django.core import management

from django.core.files.temp import NamedTemporaryFile

from django.core.serializers.base import ProgressBar

from django.db import IntegrityError, connection

from django.test import (

        management.call_command('loaddata', 'fixture1.json', verbosity=0)

        new_io = six.StringIO()

        new_io.isatty = lambda: True

        _, filename = tempfile.mkstemp()

        with NamedTemporaryFile() as file:

            options = {

                'format': 'json',

                'stdout': new_io,

                'stderr': new_io,

            'output': filename,

                'output': file.name,

            }

            management.call_command('dumpdata', 'fixtures', **options)

            self.assertTrue(new_io.getvalue().endswith('[' + '.' * ProgressBar.progress_width + ']\n'))