code: def test_node_position():
      new_node = node.Node(
          name="0", category="TERMINAL", value=np.array(0)
      )
  
      assert new_node.position == 0
  
imports: import numpy
  from opytimizer.core import node
label_desc: Use image node_id 20 for calling a global function with example usage: test_node_position() without return types