Added rollback emulation to spatialite backend; refs #22487.

class SpatiaLiteCreation(DatabaseCreation):

    def create_test_db(self, verbosity=1, autoclobber=False, keepdb=False):

    def create_test_db(self, verbosity=1, autoclobber=False, serialize=True, keepdb=False):

        """

        Creates a test database, prompting the user for confirmation if the

        database already exists. Returns the name of the test database created.

            database=self.connection.alias,

            load_initial_data=False)

        # We then serialize the current state of the database into a string

        # and store it on the connection. This slightly horrific process is so people

        # who are testing on databases without transactions or who are using

        # a TransactionTestCase still get a clean database on every test run.

        if serialize:

            self.connection._test_serialized_contents = self.serialize_db_to_string()

        # We need to then do a flush to ensure that any data installed by

        # custom SQL has been removed. The only test data should come from

        # test fixtures, or autogenerated from post_migrate triggers.