### Question:
DssRestHandler extends SimpleChannelInboundHandler<Object> implements DssHandler<DssRestChannelHandlerCommand> { @Override public void channelReadComplete(ChannelHandlerContext ctx) { ctx.flush(); } DssRestHandler(
            ActorRef<DssRestChannelInitializerCommand> restChannelInitializerActor,
            ActorRef<DssRestMasterActorCommand> restMasterActorRef,
            String name); @Override void channelReadComplete(ChannelHandlerContext ctx); @Override void exceptionCaught(ChannelHandlerContext ctx, Throwable cause); @Override void channelUnregistered(ChannelHandlerContext ctx); @Override Behavior<DssRestChannelHandlerCommand> create();  }### Answer:
@Test void channelReadComplete() throws Exception { mockChannelHandlerContextChannelId(ctx, "abcedf"); final TestProbe<DssRestMasterActorCommand> testProbe = testKit.createTestProbe(); final DssRestHandler handler = newDssRestHandlerForTest(testProbe); testKit.spawn(handler.create()); handler.channelRead0(ctx, request); handler.channelRead0(ctx, content); handler.channelReadComplete(ctx); testProbe.expectMessageClass(DssRestMasterActorCommandRequest.class); }