Scheduled Apex Class Testing Issue

Question

I am trying to test a scheduled class in apex, but upon running the test method it gives me the following error:

System.JSONException: Unexpected character ('0' (code 48)): was expecting double-quote to start field name at [line:1, column:4]

Class.System.JSON.deserialize: line 15, column 1 Class.retrieveGAdata.main: line 18, column 1 Class.scheduledGoogleAnalytics.execute: line 4, column 1

This is my test method:

 public static testMethod void testscheduledGA()
      {
          Test.startTest();

          scheduledGoogleAnalytics sga = new  scheduledGoogleAnalytics(); 
          String sch = '20 30 8 10 2 ?'; 
          system.schedule('Test GA check', sch, sga);

          Test.stopTest();


  }

This is my scheduled class:

global class scheduledGoogleAnalytics implements Schedulable {
   global void execute(SchedulableContext SC) {
      retrieveGAdata ga = new  retrieveGAdata(); 
      ga.main();
      }
    }
  }

And this is line 18 from retrieveGAdata:

 JsonGA data = (JsonGA) JSON.deserialize(s, JsonGA.class); 

where s is a string response;

Answer 1

The issue was due to the fact that I was not giving a proper json response when the test class was triggered. Adding a mock return json statement helped me solve the problem.