text: from P1.MeanAlgo import MeanAlgo
  from Items.MeanAlgoInput import MeanAlgoInput as I
  from Items.MeanAlgoOutput import MeanAlgoOutput as O
  
  
  def test_custom_impl_of_MeanAlgo():
      class MyMeanAlgo(MeanAlgo):
          def compute(self, inp1: I, inp2: I, oup: O):
              outp.value = (inp1.value + inp2.value) / 2
  
      a = MyMeanAlgo()
      inp1 = I(9)
      inp2 = I(7)
      outp = O()
      a.compute(inp1, inp2, outp)
      assert outp.value == 8
  