def test_get_id_from_href_exception(self):
        href = "525/323"

        with self.assertRaises(InvalidInput):
            douban_id = get_id_from_href(href)
    def test_get_id_from_href(self):
        href = "http://movie.douban.com/subject/1421721/"

        douban_id = get_id_from_href(href)

        self.assertEquals(douban_id, 1421721)