code: def test_mfi():
      """test TA.MFI"""
  
      mfi = TA.MFI(ohlc, 9)
      talib_mfi = talib.MFI(
          ohlc["high"], ohlc["low"], ohlc["close"], ohlc["volume"], 9
      )
  
      assert int(talib_mfi[-1]) == int(mfi.values[-1])
  
imports: import pytest
  import os
  import pandas
  from finta import TA
  import talib
label_desc: Use image node_id 16 for calling a global function with example usage: test_mfi() without return types