new_contents: import unittest
  
  from pypercube.filters import Filter
  from pypercube.filters import EQ
  from pypercube.filters import LT
  from pypercube.filters import LE
  from pypercube.filters import GT
  from pypercube.filters import GE
  from pypercube.filters import NE
  from pypercube.filters import RE
  from pypercube.filters import IN
  from pypercube.filters import StartsWith
  from pypercube.filters import EndsWith
  
  
  class TestFilter(unittest.TestCase):
      def test_equality(self):
          f1 = Filter('eq', 'name', 'test')
          f2 = EQ('name', 'test')
          self.assertEqual(f1, f2)
          f1 = Filter('lt', 'name', 'test')
          self.assertNotEqual(f1, f2)
          f2 = LT('name', 'test')
          self.assertEqual(f1, f2)
          f1 = Filter('le', 'name', 'test')
          f2 = LE('name', 'test')
          self.assertEqual(f1, f2)
          f1 = Filter('gt', 'name', 'test')
          f2 = GT('name', 'test')
          self.assertEqual(f1, f2)
          f1 = Filter('ge', 'name', 'test')
          f2 = GE('name', 'test')
          self.assertEqual(f1, f2)
          f1 = Filter('ne', 'name', 'test')
          f2 = NE('name', 'test')
          self.assertEqual(f1, f2)
          f1 = Filter('re', 'name', 'test')
          f2 = RE('name', 'test')
          self.assertEqual(f1, f2)
          f1 = Filter('in', 'name', ['t', 'e', 's', 't'])
          f2 = IN('name', 'test')
          self.assertEqual(f1, f2)
          f1 = Filter('in', 'name', ['test'])
          f2 = IN('name', ['test'])
          self.assertEqual(f1, f2)
          f1 = Filter('re', 'name', '^test')
          f2 = StartsWith('name', 'test')
          self.assertEqual(f1, f2)
          f1 = Filter('re', 'name', '.*test$')
          f2 = EndsWith('name', 'test')
          self.assertEqual(f1, f2)
  
      def test_starts_with(self):
          f = StartsWith('name', 'test')
          self.assertEqual("%s" % f, '.re(name, "^test")')
  
      def test_ends_with(self):
          f = EndsWith('name', 'test')
          self.assertEqual("%s" % f, '.re(name, ".*test$")')
  
      def test_re(self):
          # FIXME: Regular expressions are broken
          f = RE('name', r"\s+([A-Za-z0-9]+)")
          self.assertEqual("%s" % f, r'.re(name, "\s+([A-Za-z0-9]+)")')
  
      def test_in(self):
          f = IN('name', ['a', 'b', 'c'])
          self.assertEqual("%s" % f, '.in(name, ["a", "b", "c"])')
  
subject: Add Filter tests. Regular expressions are broken.