Testing Apex Classes created by JSONtoApex

Question

I'm using the json2apex (http://json2apex.herokuapp.com/) function to build a class to I can deserialize the JSON created by this call: http://services.pbs.org/callsigns/zip/77050.json

It works nicely (though I do have to replace the $ signs I get back in the results)

But when I use the simple test method it generates, it doesn't cover any of the class...what I am missing?

EDIT: Here's the class the jsontoapex creates, with the testmethod at the end. I'm sure it that test method used to provide coverage for the class, but doesn't seem to any more...

public class StationFinder_bfc {

     public class links {
        public String type;
        public String relationship;
        public String self;
        public String elements;
        public String callsign;
        public String common_name;
        public String short_common_name;
        public List<links_X> links;
                     }

public class links_X {
        public String type;
        public String mailing_state;
        public String short_common_name;
        public String relationship;
        public String self;
        public String mailing_city;
        public String created;
        public String common_name;
        public String edited;
        public String elements;
    }

    public String type;
    public String self;
    public List<items> items;
    public String elements;

    public class items {
        public Integer confidence;
        public String type;
        public Integer rank;
        public String self;
        public List<links> links;
    }


    public static StationFinder_bfc parse(String json) {
        return (StationFinder_bfc) System.JSON.deserialize(json, StationFinder_bfc.class);
    }

    static testMethod void testParse() {
        String json = '{\"$type\": \"application/vnd.pbs-collection+json\", \"$self\": \"http://services.pbs.org/callsigns/zip/77050.json\", \"$items\": [{\"confidence\": 100, \"$type\": \"application/vnd.pbs-resource+json\", \"$class\": \"CallSign2ZipMapping\", \"rank\": 1, \"$self\": \"http://services.pbs.org/callsigns/zip/77050/KUHT.json\", \"$links\": [{\"callsign\": \"KUHT\", \"$links\": [{\"$type\": \"application/vnd.pbs-resource+json\", \"mailing_state\": \"TX\", \"short_common_name\": \"Houston\", \"$class\": \"Station\", \"$relationship\": \"parent\", \"$self\": \"http://services.pbs.org/station/36.json\", \"mailing_city\": \"Houston\", \"$created\": \"2012-11-12T04:54:52-05:00\", \"$links\": [{\"$type\": \"application/vnd.pbs-collection+json\", \"$relationship\": \"children\", \"$self\": \"http://services.pbs.org/callsigns/station/36.json\", \"$elements\": \"Callsign\", \"$accepts\": [{\"$type\": \"application/vnd.pbs-resource+json\", \"$class\": \"Callsign\"}]}, {\"$relationship\": \"flagship\", \"$type\": \"application/vnd.pbs-resource+json\", \"$class\": \"Callsign\", \"callsign\": \"KUHT\", \"$self\": \"http://services.pbs.org/callsign/KUHT.json\"}], \"common_name\": \"KUHT / Channel 8\", \"$edited\": \"2012-11-12T04:54:52-05:00\"}, {\"$type\": \"application/vnd.pbs-collection+json\", \"$relationship\": \"children\", \"$elements\": \"Feed\", \"$self\": \"http://services.pbs.org/feeds/callsign/KUHT.json\"}], \"$type\": \"application/vnd.pbs-resource+json\", \"$class\": \"Callsign\", \"$relationship\": \"related\", \"$self\": \"http://services.pbs.org/callsign/KUHT.json\"}]}], \"$elements\": \"CallSign2ZipMapping\", \"$accepts\": [{\"$type\": \"application/vnd.pbs-resource+json\", \"$class\": \"CallSign2ZipMapping\"}]}';
        String sBody = json.replace('$','');

        StationFinder_bfc obj = parse(sBody);
        System.assert(obj != null);
    }

    }

Answer 1

Add the {get; set;} accessors to the properties to get coverage.

Answer 2

You will have worked it out by now, but for anyone else who gets here...You need to instantiate the class and the inner classes and reference them in the test method.

Answer 3

You may need to post some actual code, but if you are testing code that is making live web services calls, you will never get coverage because Apex tests do not execute web service callouts. If that's the case, you'll need to mock out the web service call for your test method. Apex has built-in support for Apex2WSDL mock services. The details are here, but if you're getting your JSON from a simple REST service, it's usually just a couple lines of code that allow a live call in normal execution and a mock call in test execution (Test.isTestRunning()).