def test_add(self):
fs = FeatureSet()
fs.add(self.number.singular)
self.assertEqual(1, len(fs))
fs.add(self.number.singular)
self.assertEqual(1, len(fs))
fs.add(self.number.plural)
self.assertEqual(2, len(fs))
def test_not_equals(self):
fs1 = FeatureSet([self.number.singular, self.person.first])
fs2 = FeatureSet()
fs2.add(self.number.plural)
fs2.add(self.person.first)
self.assertNotEqual(fs1, fs2)