old_contents: from __future__ import print_function
  
  import mdtraj as md
  
  import pytest
  from mdtraj.utils import six
  from mdtraj.testing import get_fn, eq
  import os
  import shutil
  import tarfile
  import tempfile
  from fahmunge import fah
  
  def deprecated_test_fah_core17_1():
      filename = get_fn('frame0.xtc')
      tempdir = tempfile.mkdtemp()
      tar_filename = os.path.join(tempdir, "results-000.tar.bz2")
      archive = tarfile.open(tar_filename, mode='w:bz2')
  
      tar = tarfile.open(tar_filename, "w:bz2")
      tar.add(filename, arcname="positions.xtc")
      tar.close()
  
      shutil.copy(tar_filename, os.path.join(tempdir, "results-001.tar.bz2"))
  
      trj0 = md.load(get_fn("frame0.xtc"), top=get_fn("frame0.h5"))
      output_filename = os.path.join(tempdir, "traj.h5")
      fah.concatenate_core17(tempdir, trj0, output_filename)
  
      trj = md.load(output_filename)
      eq(trj.n_atoms, trj0.n_atoms)
      eq(trj.n_frames, trj0.n_frames * 2)
  
      shutil.copy(tar_filename, os.path.join(tempdir, "results-002.tar.bz2"))
  
      fah.concatenate_core17(tempdir, trj0, output_filename)
      # Should notice the new file and append it to the HDF file.
  
      trj = md.load(output_filename)
      eq(trj.n_atoms, trj0.n_atoms)
      eq(trj.n_frames, trj0.n_frames * 3)
  
new_contents: from __future__ import print_function
  
  import mdtraj as md
  
  import pytest
  from mdtraj.utils import six
  from mdtraj.testing import get_fn, eq
  import os
  import shutil
  import tarfile
  import tempfile
  from fahmunge import fah
  
  # TODO: Add unit tests for components of the code.
  
  def test_dummy():
      """Dummy test to ensure py.test doesn't exist with error code 5."""
      pass
  
  def deprecated_test_fah_core17_1():
      filename = get_fn('frame0.xtc')
      tempdir = tempfile.mkdtemp()
      tar_filename = os.path.join(tempdir, "results-000.tar.bz2")
      archive = tarfile.open(tar_filename, mode='w:bz2')
  
      tar = tarfile.open(tar_filename, "w:bz2")
      tar.add(filename, arcname="positions.xtc")
      tar.close()
  
      shutil.copy(tar_filename, os.path.join(tempdir, "results-001.tar.bz2"))
  
      trj0 = md.load(get_fn("frame0.xtc"), top=get_fn("frame0.h5"))
      output_filename = os.path.join(tempdir, "traj.h5")
      fah.concatenate_core17(tempdir, trj0, output_filename)
  
      trj = md.load(output_filename)
      eq(trj.n_atoms, trj0.n_atoms)
      eq(trj.n_frames, trj0.n_frames * 2)
  
      shutil.copy(tar_filename, os.path.join(tempdir, "results-002.tar.bz2"))
  
      fah.concatenate_core17(tempdir, trj0, output_filename)
      # Should notice the new file and append it to the HDF file.
  
      trj = md.load(output_filename)
      eq(trj.n_atoms, trj0.n_atoms)
      eq(trj.n_frames, trj0.n_frames * 3)
  
subject: Add dummy test so pytest doesn't complain