code: def test_force_block_config(block_config_str, expected_block_config):
      config = {
          "dev_force_block_config": block_config_str,
      }
      with tvm.transform.PassContext(
          config={"relay.ext.ethos-u.options": config}
      ):
          block_config = vela_api.get_optimal_block_config(
              None, vapi.NpuAccelerator.Ethos_U55_128
          )
          assert block_config == expected_block_config
  
imports: import pytest
  import numpy
  from ethosu.vela import api
  from unittest.mock import patch
  import tvm
  from tvm.script import tir
  from tvm.tir import stmt_functor
  from tvm.relay.backend.contrib.ethosu import vela_api
  import tvm.relay.backend.contrib.ethosu.tir_to_cs_translator
label_desc: Use image node_id 2 for calling a global function with example usage: test_force_block_config(block_config_str, expected_block_config) without return types