@Test
    void testHandleRequest() {
        VipStatusConfig config = new VipStatusConfig(new VipStatusConfig.Builder().accessdisk(false));
        VipStatusHandler handler = new VipStatusHandler(Executors.newCachedThreadPool(), config, metric);
        MockResponseHandler responseHandler = new MockResponseHandler();
        HttpRequest request = createRequest();
        BufferedContentChannel requestContent = createChannel();
        handler.handleRequest(request, requestContent, responseHandler);
        ByteBuffer b = responseHandler.channel.read();
        byte[] asBytes = new byte[b.remaining()];
        b.get(asBytes);
        assertEquals(VipStatusHandler.OK_MESSAGE, Utf8.toString(asBytes));
    }
Check semantics of VIP status handler. Do note this handler does not need to
care about the incoming URI, that's 100% handled in JDIsc by the binding
pattern.

@author Steinar Knutsen
container-core/src/test/java/com/yahoo/container/handler/VipStatusHandlerTestCase.java