describe("Example Of jasmine Spy using spyOn()", function() { 
  
   it('uses the dictionary to say "hello world"', function() { 
      var dictionary = new Dictionary; 
      var person = new Person; 
		
      spyOn(dictionary, "hello"); //.and.returnValue('hello');  // replace hello function with a spy 
      //console.log(r);
      spyOn(dictionary, "world").and.returnValue('worcld');  // replace world function with another spy 
		
      var retval = person.sayHelloWorld(dictionary);
      console.log(retval);
      expect(retval).toBe('hello world');
      expect(dictionary.hello).toHaveBeenCalled();  
      // not possible without first spy 
  
      expect(dictionary.world).toHaveBeenCalled();  
      // not possible withoutsecond spy 
   }); 
});