java - Unit testing OdataFeed -

i have java class, takes odatafeed input, processes , pushed rabbitmq. writing junit testing this, input odatafeed json, have sample sample json format, how convert odatafeed.

@override     public void process(exchange exchange) throws exception {          gson gson = new gsonbuilder().serializenulls().create();         list<map<string, object>> list = gson.fromjson(json, list.class);         maps = setentriesmap(list, maps);          odatafeed feed = (odatafeed) exchange.getin().getbody(); 

in junit, have string

string result = "<json>";         byte[] array = result.getbytes();                camelcontext ctx = new defaultcamelcontext();         exchange ex = new defaultexchange(ctx);         ex.getin().setheader("rabbitmq", "rabbitmq");         ex.getin().setbody(array); 

since required input odatafeed, not able convert string odatafeed. need here, how unit test component. , looking basic tutorials in jmockit, have few other classes calls httprequest , kiewb in flow, need advice in mocking components