Fixed #25400 -- Fixed regression in nonexistent features on gis backends.

        m = re.match(r'has_(\w*)_function$', name)

        if m:

            func_name = m.group(1)

            if func_name not in self.connection.ops.unsupported_functions:

                return True

        return False

            return func_name not in self.connection.ops.unsupported_functions

        raise AttributeError

    def has_ops_method(self, method):

        return getattr(self.connection.ops, method, False)

from django.db import connection

from django.test import TestCase

class TestDatabaseFeatures(TestCase):

    def test_nonexistent_feature(self):

        self.assertFalse(hasattr(connection.features, 'nonexistent'))