new_contents: from __future__ import unicode_literals
  import unittest
  from ufoLib.filenames import userNameToFileName, handleClash1, handleClash2
  
  
  class TestFilenames(unittest.TestCase):
  
      def test_userNameToFileName(self):
          self.assertEqual(userNameToFileName("a"), "a")
          self.assertEqual(userNameToFileName("A"), "A_")
          self.assertEqual(userNameToFileName("AE"), "A_E_")
          self.assertEqual(userNameToFileName("Ae"), "A_e")
          self.assertEqual(userNameToFileName("ae"), "ae")
          self.assertEqual(userNameToFileName("aE"), "aE_")
          self.assertEqual(userNameToFileName("a.alt"), "a.alt")
          self.assertEqual(userNameToFileName("A.alt"), "A_.alt")
          self.assertEqual(userNameToFileName("A.Alt"), "A_.A_lt")
          self.assertEqual(userNameToFileName("A.aLt"), "A_.aL_t")
          self.assertEqual(userNameToFileName("A.alT"), "A_.alT_")
          self.assertEqual(userNameToFileName("T_H"), "T__H_")
          self.assertEqual(userNameToFileName("T_h"), "T__h")
          self.assertEqual(userNameToFileName("t_h"), "t_h")
          self.assertEqual(userNameToFileName("F_F_I"), "F__F__I_")
          self.assertEqual(userNameToFileName("f_f_i"), "f_f_i")
          self.assertEqual(userNameToFileName("Aacute_V.swash"),
                           "A_acute_V_.swash")
          self.assertEqual(userNameToFileName(".notdef"), "_notdef")
          self.assertEqual(userNameToFileName("con"), "_con")
          self.assertEqual(userNameToFileName("CON"), "C_O_N_")
          self.assertEqual(userNameToFileName("con.alt"), "_con.alt")
          self.assertEqual(userNameToFileName("alt.con"), "alt._con")
  
      def test_userNameToFileName_ValueError(self):
          with self.assertRaises(ValueError):
              userNameToFileName(b"a")
          with self.assertRaises(ValueError):
              userNameToFileName({"a"})
          with self.assertRaises(ValueError):
              userNameToFileName(("a",))
          with self.assertRaises(ValueError):
              userNameToFileName(["a"])
          with self.assertRaises(ValueError):
              userNameToFileName(["a"])
          with self.assertRaises(ValueError):
              userNameToFileName(b"\xd8\x00")
  
      def test_handleClash1(self):
          prefix = ("0" * 5) + "."
          suffix = "." + ("0" * 10)
          existing = ["a" * 5]
  
          e = list(existing)
          self.assertEqual(
              handleClash1(userName="A" * 5, existing=e, prefix=prefix,
                           suffix=suffix),
              '00000.AAAAA000000000000001.0000000000'
          )
  
          e = list(existing)
          e.append(prefix + "aaaaa" + "1".zfill(15) + suffix)
          self.assertEqual(
              handleClash1(userName="A" * 5, existing=e, prefix=prefix,
                           suffix=suffix),
              '00000.AAAAA000000000000002.0000000000'
          )
  
          e = list(existing)
          e.append(prefix + "AAAAA" + "2".zfill(15) + suffix)
          self.assertEqual(
              handleClash1(userName="A" * 5, existing=e, prefix=prefix,
                           suffix=suffix),
              '00000.AAAAA000000000000001.0000000000'
          )
  
      def test_handleClash2(self):
          prefix = ("0" * 5) + "."
          suffix = "." + ("0" * 10)
          existing = [prefix + str(i) + suffix for i in range(100)]
  
          e = list(existing)
          self.assertEqual(
              handleClash2(existing=e, prefix=prefix, suffix=suffix),
              '00000.100.0000000000'
          )
  
          e = list(existing)
          e.remove(prefix + "1" + suffix)
          self.assertEqual(
              handleClash2(existing=e, prefix=prefix, suffix=suffix),
              '00000.1.0000000000'
          )
  
          e = list(existing)
          e.remove(prefix + "2" + suffix)
          self.assertEqual(
              handleClash2(existing=e, prefix=prefix, suffix=suffix),
              '00000.2.0000000000'
          )
  
subject: copy doctest as unittest in test_filenames