code: def test_intrinsic_math2_codegen():
      # not included: frexp, ldexp, modf, fmod
      from sympy.functions.elementary.trigonometric import atan2
  
      x, y = symbols("x,y")
      name_expr = [
          ("test_atan2", atan2(x, y)),
          ("test_pow", x**y),
      ]
      result = codegen(
          name_expr, "F95", "file", header=False, empty=False
      )
      assert result[0][0] == "file.f90"
      expected = (
          "REAL*8 function test_atan2(x, y)\n"
          "implicit none\n"
          "REAL*8, intent(in) :: x\n"
          "REAL*8, intent(in) :: y\n"
          "test_atan2 = atan2(x, y)\n"
          "end function\n"
          "REAL*8 function test_pow(x, y)\n"
          "implicit none\n"
          "REAL*8, intent(in) :: x\n"
          "REAL*8, intent(in) :: y\n"
          "test_pow = x**y\n"
          "end function\n"
      )
      assert result[0][1] == expected
  
      assert result[1][0] == "file.h"
      expected = (
          "interface\n"
          "REAL*8 function test_atan2(x, y)\n"
          "implicit none\n"
          "REAL*8, intent(in) :: x\n"
          "REAL*8, intent(in) :: y\n"
          "end function\n"
          "end interface\n"
          "interface\n"
          "REAL*8 function test_pow(x, y)\n"
          "implicit none\n"
          "REAL*8, intent(in) :: x\n"
          "REAL*8, intent(in) :: y\n"
          "end function\n"
          "end interface\n"
      )
      assert result[1][1] == 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 40 for calling a global function with example usage: test_intrinsic_math2_codegen() without return types