def METHOD_NAME(self):
    super().METHOD_NAME()
    self.block = BlockMock(name='block')
    self.runtime = DescriptorSystem(
        load_item=Mock(name='get_test_descriptor_system.load_item'),
        resources_fs=Mock(name='get_test_descriptor_system.resources_fs'),
        error_tracker=Mock(name='get_test_descriptor_system.error_tracker')
    )
    self.runtime.get_block_for_descriptor = Mock()
    self.runtime.handler_url_override = handler_url