mock_tomcat.java

        RedisSessionHandlerValve valve = new RedisSessionHandlerValve();

        Pipeline pipeline = Mockito.mock(Pipeline.class);
        Container container = Mockito.mock(Container.class);
        Context context = Mockito.mock(Context.class);
        Mockito.when(context.getParent()).thenReturn(container);
        Mockito.when(context.getName()).thenReturn("/");
        Mockito.when(context.getPipeline()).thenReturn(pipeline);
        Mockito.when(container.getName()).thenReturn("Nice");
        Mockito.when(pipeline.getValves()).thenReturn(new Valve[] {valve});

        RedisSessionManager manager = new RedisSessionManager();
        manager.setHost("172.16.201.13");
        manager.setPort(6379);
        manager.setContext(context);
        manager.start();

        Session aaaa = manager.findSession("aaaa");