new_contents: # This file is part of QuTiP: Quantum Toolbox in Python.
  #
  #    Copyright (c) 2011 and later, Paul D. Nation and Robert J. Johansson.
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  ###############################################################################
  
  import numpy as np
  from numpy.testing import assert_, assert_equal, run_module_suite
  import qutip as qt
  from qutip.solver import config
  
  
  def test_rhs_reuse():
      """
      rhs_reuse : pyx filenames match for rhs_reus= True
      """
      N = 10 
      a = qt.destroy(N)
      H = [a.dag()*a, [a+a.dag(), 'sin(t)']]
      psi0 = qt.fock(N,3)
      tlist = np.linspace(0,10,10)
      e_ops = [a.dag()*a]
      c_ops = [0.25*a]
  
      # Test sesolve
      out1 = qt.mesolve(H, psi0,tlist, e_ops=e_ops)
  
      _temp_config_name = config.tdname
  
      out2 = qt.mesolve(H, psi0,tlist, e_ops=e_ops)
  
      assert_(config.tdname != _temp_config_name)
      _temp_config_name = config.tdname
  
      out3 = qt.mesolve(H, psi0,tlist, e_ops=e_ops, 
                          options=qt.Options(rhs_reuse=True))
                      
      assert_(config.tdname == _temp_config_name)
  
      # Test mesolve
  
      out1 = qt.mesolve(H, psi0,tlist, c_ops=c_ops, e_ops=e_ops)
  
      _temp_config_name = config.tdname
  
      out2 = qt.mesolve(H, psi0,tlist, c_ops=c_ops, e_ops=e_ops)
  
      assert_(config.tdname != _temp_config_name)
      _temp_config_name = config.tdname
  
      out3 = qt.mesolve(H, psi0,tlist, e_ops=e_ops, c_ops=c_ops,
                          options=qt.Options(rhs_reuse=True))
                      
      assert_(config.tdname == _temp_config_name)
  
  if __name__ == "__main__":
      run_module_suite()
  
subject: Add tests for rhs_reuse