code: def test_numbersymbol_f_code():
      routine = make_routine("test", pi**Catalan)
      code_gen = FCodeGen()
      source = get_string(code_gen.dump_f95, [routine])
      expected = (
          "REAL*8 function test()\n"
          "implicit none\n"
          "REAL*8, parameter :: Catalan = %sd0\n"
          "REAL*8, parameter :: pi = %sd0\n"
          "test = pi**Catalan\n"
          "end function\n"
      ) % (Catalan.evalf(17), pi.evalf(17))
      assert source == expected
  
imports: from io import StringIO
  from sympy.core import symbols, Eq, pi, Catalan, Lambda, Dummy
  from sympy.core.relational import Equality
  from sympy.core.symbol import Symbol
  from sympy.functions.special.error_functions import erf
  from sympy.integrals.integrals import Integral
  from sympy.matrices import Matrix, MatrixSymbol
  from sympy.utilities.codegen import codegen, make_routine, CCodeGen, C89CodeGen, C99CodeGen, InputArgument, CodeGenError, FCodeGen, CodeGenArgumentListError, OutputArgument, InOutArgument
  from sympy.testing.pytest import raises
  from sympy.utilities.lambdify import implemented_function
label_desc: Use image node_id 32 for calling a global function with example usage: test_numbersymbol_f_code() without return types