code: def test_move_and_copy_casts():
      """Cast some values in C++ via custom type casters and count the number of moves/copies."""
  
      cstats = m.move_and_copy_cstats()
      c_m, c_mc, c_c = (
          cstats["MoveOnlyInt"],
          cstats["MoveOrCopyInt"],
          cstats["CopyOnlyInt"],
      )
  
      # The type move constructions/assignments below each get incremented: the move assignment comes
      # from the type_caster load; the move construction happens when extracting that via a cast or
      # loading into an argument.
      assert m.move_and_copy_casts(3) == 18
      assert c_m.copy_assignments + c_m.copy_constructions == 0
      assert c_m.move_assignments == 2
      assert c_m.move_constructions >= 2
      assert c_mc.alive() == 0
      assert c_mc.copy_assignments + c_mc.copy_constructions == 0
      assert c_mc.move_assignments == 2
      assert c_mc.move_constructions >= 2
      assert c_c.alive() == 0
      assert c_c.copy_assignments == 2
      assert c_c.copy_constructions >= 2
      assert c_m.alive() + c_mc.alive() + c_c.alive() == 0
  
file_path: coremltools/deps/pybind11/tests/test_copy_move.py
imports: import pytest
  from pybind11_tests import copy_move_policies
label_desc: Use image node_id 3 for calling a global function with example usage: test_move_and_copy_casts() without return types