def METHOD_NAME(self):
    """
    Make sure that answer for incorrect request is error json.
    """
    module_system = get_test_system()
    block = WordCloudBlock(module_system, DictFieldData(self.raw_field_data), Mock())
    response = json.loads(block.handle_ajax('bad_dispatch', {}))
    self.assertDictEqual(response, {
        'status': 'fail',
        'error': 'Unknown Command!'
    })