code: def test_function():
      f, l = map(Function, "fl")
      x = Symbol("x")
      assert exp(l(x)) * l(x) / exp(l(x)) == l(x)
      assert exp(f(x)) * f(x) / exp(f(x)) == f(x)
  
file_path: sympy/sympy/core/tests/test_eval.py
imports: from sympy.core.function import Function
  from sympy.core.numbers import I, Rational
  from sympy.core.singleton import S
  from sympy.core.symbol import Symbol
  from sympy.functions.elementary.exponential import exp
  from sympy.functions.elementary.miscellaneous import sqrt
  from sympy.functions.elementary.trigonometric import cos, tan
  from sympy.testing.pytest import XFAIL
label_desc: Use image node_id 8 for calling a global function with example usage: test_function() without return types