@Test
public void invokingTtlCreatesNewSpan() {

  commandCreatesNewSpan(RedisCommand.TTL, () -> getConnection().ttl("key".getBytes()));
  verify(mockRedisConnection()).ttl("key".getBytes());
  commandCreatesNewSpan(RedisCommand.TTL,
      () -> getConnection().ttl("key".getBytes(), TimeUnit.SECONDS));
  verify(mockRedisConnection()).ttl("key".getBytes(), TimeUnit.SECONDS);
}