'Test bson_ts_to_long and long_to_bson_ts'

def test_bson_ts_to_long(self):

    tstamp = timestamp.Timestamp(305419896, 2427178479)
    self.assertEqual(1311768467294899695, bson_ts_to_long(tstamp))
    self.assertEqual(long_to_bson_ts(1311768467294899695), tstamp)
