Refs #21548 -- Skipped tests that rely on pillow when it's not installed

import re

import types

from datetime import datetime, timedelta

from unittest import TestCase

from unittest import TestCase, skipUnless

from django.core.exceptions import ValidationError

from django.core.files.base import ContentFile

from django.test.utils import str_prefix

from django.utils._os import upath

try:

    from PIL import Image  # noqa

except ImportError:

    PILLOW_IS_INSTALLED = False

else:

    PILLOW_IS_INSTALLED = True

NOW = datetime.now()

EXTENDED_SCHEMES = ['http', 'https', 'ftp', 'ftps', 'git', 'file', 'git+ssh']

    else:

        val_name = validator.__class__.__name__

    test_name = test_mask % (val_name, num)

    if validator is validate_image_file_extension:

        SKIP_MSG = "Pillow is required to test validate_image_file_extension"

        test_func = skipUnless(PILLOW_IS_INSTALLED, SKIP_MSG)(test_func)

    return test_name, test_func

# Dynamically assemble a test class with the contents of TEST_DATA