import django
from django.conf import settings
from django.test import TestCase

if django.VERSION < (4, 2):
    class TestCase(TestCase):
        assertQuerySetEqual = TestCase.assertQuerysetEqual


# django-crispy-forms is optional
try:
    import crispy_forms
except ImportError:
    crispy_forms = None


def is_crispy():
    return "crispy_forms" in settings.INSTALLED_APPS and crispy_forms


# coreapi is optional (Note that uritemplate is a dependency of coreapi)
# Fixes #525 - cannot simply import from rest_framework.compat, due to
# import issues w/ django-guardian.
try:
    import coreapi
except ImportError:
    coreapi = None

try:
    import coreschema
except ImportError:
    coreschema = None