def testIdenticalSentences(self):
        '''Check that the distance from a sentence to itself is zero.'''

        model = word2vec.Word2Vec(sentences, min_count=1)
        sentence = ['survey', 'user', 'computer', 'system', 'response', 'time']
        distance = model.wv.wmdistance(sentence, sentence)
        self.assertEqual(0.0, distance)