code: def test_objective():
      assert fu(
          sin(x) / cos(x), measure=lambda x: x.count_ops()
      ) == tan(x)
      assert fu(
          sin(x) / cos(x), measure=lambda x: -x.count_ops()
      ) == sin(x) / cos(x)
  
imports: from sympy.core.add import Add
  from sympy.core.mul import Mul
  from sympy.core.numbers import I, Rational, pi
  from sympy.core.singleton import S
  from sympy.core.symbol import Dummy, Symbol, symbols
  from sympy.functions.elementary.hyperbolic import cosh, coth, csch, sech, sinh, tanh
  from sympy.functions.elementary.miscellaneous import root, sqrt
  from sympy.functions.elementary.trigonometric import cos, cot, csc, sec, sin, tan
  from sympy.simplify.powsimp import powsimp
  from sympy.simplify.fu import L, TR1, TR10, TR10i, TR11, _TR11, TR12, TR12i, TR13, TR14, TR15, TR16, TR111, TR2, TR2i, TR3, TR5, TR6, TR7, TR8, TR9, TRmorrie, _TR56, TRpower, hyper_as_trig, fu, process_common_addends, trig_split, as_f_sign_1
  from sympy.core.random import verify_numerically
  from sympy.abc import a, b, c, x, y, z
label_desc: Use image node_id 19 for calling a global function with example usage: test_objective() without return types