old_contents: #!/usr/bin/env python
  # -*- coding: utf-8 -*-
  import hashlib
  import os
  import tempfile
  
  import numpy as np
  
  import fcswrite
  
  
  def test_write_fcs():
      """test that fcm can read the data files"""
      fname = tempfile.mktemp(suffix=".fcs", prefix="write_test")
      data = 1.0*np.arange(400).reshape((100, 4))
      chn_names = ['cha', 'chb', 'ch3', 'ch4']
      fcswrite.write_fcs(filename=fname,
                         chn_names=chn_names,
                         data=data
                         )
  
      with open(fname, "rb") as fd:
          data = fd.read()
      data = np.frombuffer(data, dtype=np.uint8)
      # remove empty lines
      data = data[data != 8224]
      data = data.tostring()
      hasher = hashlib.md5()
      hasher.update(data)
      hexval = hasher.hexdigest()
      assert hexval == "6c7f642480a95f0b41899b125a1d1f78"
      os.remove(fname)
  
  
  if __name__ == "__main__":
      # Run all tests
      loc = locals()
      for key in list(loc.keys()):
          if key.startswith("test_") and hasattr(loc[key], "__call__"):
              loc[key]()
  
new_contents: #!/usr/bin/env python
  # -*- coding: utf-8 -*-
  import hashlib
  import os
  import tempfile
  
  import numpy as np
  
  import fcswrite
  
  
  def test_write_fcs():
      """test that fcm can read the data files"""
      fname = tempfile.mktemp(suffix=".fcs", prefix="write_test")
      data = 1.0*np.arange(400).reshape((100, 4))
      chn_names = ['cha', 'chb', 'ch3', 'ch4']
      fcswrite.write_fcs(filename=fname,
                         chn_names=chn_names,
                         data=data
                         )
  
      with open(fname, "rb") as fd:
          data = fd.read()
      data = np.frombuffer(data, dtype=np.uint8)
      # remove empty lines
      data = data[data != 8224]
      data = data.tostring()
      hasher = hashlib.md5()
      hasher.update(data)
      hexval = hasher.hexdigest()
      assert hexval == "68ddd6a1494a3374a3c3ebc0b6bbc5ec"
      os.remove(fname)
  
  
  if __name__ == "__main__":
      # Run all tests
      loc = locals()
      for key in list(loc.keys()):
          if key.startswith("test_") and hasattr(loc[key], "__call__"):
              loc[key]()
  
subject: correct checksum