code: @Test public void goAwayRoundTrip() throws IOException {
    OkBuffer frame=new OkBuffer();
    final ErrorCode expectedError=ErrorCode.PROTOCOL_ERROR;
    frame.writeInt(0x80000000 | (Spdy3.VERSION & 0x7fff) << 16 | Spdy3.TYPE_GOAWAY & 0xffff);
    frame.writeInt(8);
    frame.writeInt(expectedStreamId);
    frame.writeInt(expectedError.spdyGoAwayCode);
    assertEquals(frame,sendGoAway(expectedStreamId,expectedError,Util.EMPTY_BYTE_ARRAY));
    assertEquals(frame,sendGoAway(expectedStreamId,expectedError,new byte[8]));
    FrameReader fr=new Spdy3.Reader(frame,false);
    fr.nextFrame(new BaseTestHandler(){
      @Override public void goAway(    int lastGoodStreamId,    ErrorCode errorCode,    ByteString debugData){
        assertEquals(expectedStreamId,lastGoodStreamId);
        assertEquals(expectedError,errorCode);
        assertEquals(0,debugData.size());
      }
    }
  );
  }
  