code: def test_efo_calculate_indexes():
      new_efo = efo.EFO()
  
      a, b, c = new_efo._calculate_indexes(30)
  
      assert a >= 0
      assert b >= 0
      assert c >= 0
  
imports: import numpy
  from opytimizer.optimizers.science import efo
  from opytimizer.spaces import search
label_desc: Use image node_id 3 for calling a global function with example usage: test_efo_calculate_indexes() without return types