new_contents: # coding: utf-8
  """
      Test the core Potential classes
  """
  
  from __future__ import absolute_import, unicode_literals, division, print_function
  
  __author__ = "adrn <adrn@astro.columbia.edu>"
  
  import os
  import pytest
  import numpy as np
  from astropy.utils.console import color_print
  from astropy.constants import G
  import astropy.units as u
  import matplotlib.pyplot as plt
  from matplotlib import cm
  
  from ..cpotential import CPotential
  
  #top_path = "/tmp/streamteam"
  top_path = "plots/"
  plot_path = os.path.join(top_path, "tests/potential/cpotential")
  if not os.path.exists(plot_path):
      os.makedirs(plot_path)
  
  usys = [u.kpc,u.Myr,u.Msun,u.radian]
  G = G.decompose(usys)
  
  print()
  color_print("~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~", "yellow")
  color_print("To view plots:", "green")
  print("    open {}".format(plot_path))
  color_print("~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~", "yellow")
  
  def test_simple():
      return
  
subject: test file for new cython