code: def test_positional(self):
      def f(a, b, c):
          return a + b + c
  
      g = utils.inject_dependencies(f)
  
      y = g("a", "b", "c")
  
      assert y == "abc"
  
imports: from unittest import TestCase
  import pytest
  from elegy import utils
label_desc: Use image node_id 1 for calling the DIFunctionTests obj's underlying member method code with example usage: obj.test_positional() and returns: unknown