code: def test_ep_update_strategy():
      search_space = search.SearchSpace(
          n_agents=10,
          n_variables=2,
          lower_bound=[0, 0],
          upper_bound=[10, 10],
      )
  
      new_ep = ep.EP()
      new_ep.compile(search_space)
  
      new_ep._update_strategy(0, [1], [2])
  
      assert new_ep.strategy[0][0] > 0
  
file_path: opytimizer/tests/opytimizer/optimizers/evolutionary/test_ep.py
imports: import numpy
  from opytimizer.optimizers.evolutionary import ep
  from opytimizer.spaces import search
label_desc: Use image node_id 5 for calling a global function with example usage: test_ep_update_strategy() without return types