code: def test_pow():
      assert h**l == h**x == 1
      assert l**h == x**h == 2
      assert (x**l).args == (1 / x).args and (x**l).is_Pow
      assert (l**x).args == ((-1) ** x).args and (l**x).is_Pow
  
imports: from sympy.core.decorators import call_highest_priority
  from sympy.core.expr import Expr
  from sympy.core.mod import Mod
  from sympy.core.numbers import Integer
  from sympy.core.symbol import Symbol
  from sympy.functions.elementary.integers import floor
label_desc: Use image node_id 4 for calling a global function with example usage: test_pow() without return types