### Question:
DssWebSocketHandler extends ChannelInboundHandlerAdapter { @Override public void channelReadComplete(ChannelHandlerContext ctx) { ctx.flush(); }  @Override void channelRead(ChannelHandlerContext ctx, Object msg); @Override void channelReadComplete(ChannelHandlerContext ctx); @Override void exceptionCaught(ChannelHandlerContext ctx, Throwable cause);  }### Answer:
@Test void channelReadComplete() { mockChannelHandlerContextChannelId(ctx, "abcedf"); final DssWebSocketHandler handler = new DssWebSocketHandler(); handler.channelRead(ctx, message); handler.channelReadComplete(ctx); Mockito.verify(ctx).flush(); }