@Test(expected = Http2Exception.class)
public void failedWhenWindowUpdateFrameWithZeroDelta() throws Http2Exception {

    ByteBuf input = Unpooled.buffer();
    try {
        writeFrameHeader(input, 4, WINDOW_UPDATE, new Http2Flags(), 0);
        input.writeInt(0);
        frameReader.readFrame(ctx, input, listener);
    } finally {
        input.release();
    }
}