def METHOD_NAME(self):
    """
    Verify that a SiteConfiguration instance is created with the provided values if it does not exist.
    """
    self.assert_site_configuration_does_not_exist()
    call_command(self.command, '-f', str(self.json_file_path.abspath()), *self.site_id_arg)
    site_configuration = self.get_site_configuration()
    assert site_configuration.site_values == {'ABC': 123, 'XYZ': '789'}