code: def test_pow_eval_X1():
      assert (-1) ** Rational(1, 3) == S.Half + S.Half * I * sqrt(3)
  
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 4 for calling a global function with example usage: test_pow_eval_X1() without return types