text: """
  MIT License
  
  Copyright (c) 2020 Dominik Kopczynski   -   dominik.kopczynski {at} isas.de
                     Nils Hoffmann  -  nils.hoffmann {at} isas.de
  
  Permission is hereby granted, free of charge, to any person obtaining a copy
  of this software and associated documentation files (the "Software"), to deal
  in the Software without restriction, including without limitation the rights
  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  copies of the Software, and to permit persons to whom the Software is
  furnished to do so, subject to the following conditions:
  
  The above copyright notice and this permission notice shall be included in all
  copies or substantial portions of the Software.
  
  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  SOFTWARE.
  """
  
  import unittest
  import os
  import csv
  from pygoslin.parser.Parser import *
  from pygoslin.domain.LipidExceptions import *
  from pygoslin.domain.LipidLevel import *
  from pygoslin.domain.Element import *
  
  try:
      import pyximport
      pyximport.install(setup_args = {"script_args" : ["--force"]}, language_level = 3)
  except:
      print("Warning: cython module is not installed, parsing performance will be lower since pure python code will be applied.")
  
  parser = GoslinParser()
  
  class TestFormulas(unittest.TestCase):
  
      def test_masses(self):
          global parser
          file_name = os.path.join("pygoslin", "data", "goslin", "testfiles", 'lipid-masses.csv')
          with open(file_name, newline='') as csvfile:
              lipidreader = csv.reader(csvfile, delimiter=',', quotechar='\"')
              for i, row in enumerate(lipidreader):
                  if i == 0: continue
                  
                  lipid_name = row[1] + row[3]
                  
                  try:
                      lipid = parser.parse(lipid_name)
                  except LipidException as e:
                      print(row[0], e)
                      assertTrue(False)
                   
                  self.assertEqual(lipid.get_lipid_string(LipidLevel.CLASS), row[0], "for lipid '%s'" % lipid_name)
                  self.assertEqual(compute_sum_formula(lipid.lipid.get_elements()), row[2], "for lipid '%s'" % lipid_name)
                  self.assertTrue(abs(lipid.get_mass() - float(row[4])) < 0.001, "for lipid '%s'" % lipid_name)
                  self.assertEqual(lipid.adduct.get_charge(), int(row[5]), "for lipid '%s'" % lipid_name)
  
  
  