TestMethod in c# for JSON data check from ASP .NET MVC controller

Question

Please tell me how to get the value by not changing the controller action.

Controller
     [HttpPost]
        public JsonResult A_Action_In_Controller(Guid ID)
        {
            var operationConfirmation = _repository.DoSomethingInDB(emailID);

            return Json(new { operationConfirmation }, JsonRequestBehavior.AllowGet);
        }
Test Method
    [TestMethod]
        public void DoSomethingInDB_SendOperationConfirmationToTheUI()
        {... 
                var expected = "Successfully Completed";

            var target = controller.A_Action_In_Controller(obj1.Id);

            Assert.AreEqual(expected, target.Data);

        }

Error

Assert.AreEqual failed. Expected:<Successfully Completed (System.String)>. Actual:<{ operationConfirmation = Successfully

Completed } (<>f__AnonymousType2`1[[System.String, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]])>.

Please tell me how to write something like Assert.AreEqual(expected, target.Data.operationConfirmation);

instead of what I am having now, i dont want to change my controller code

Assert.AreEqual(expected, target.Data);

Answer 1

Controller is changed to

Controller
 [HttpPost]
    public JsonResult A_Action_In_Controller(Guid ID)
    {
        var operationConfirmation = _repository.DoSomethingInDB(emailID);

        return Json(operationConfirmation, JsonRequestBehavior.AllowGet);
    }

Then test method works well

  [TestMethod]
    public void DoSomethingInDB_SendOperationConfirmationToTheUI()
    {... var expected = "Operation failed";         


        var target = controller.A_Action_In_Controller(obj1.Id);

        Assert.AreEqual(expected, target.Data);

Answer 2

You need to deserialize the JSON string, the below uses the JavaScriptSerializer class:

First, name your confirmation in your A_Action_In_Controller method, like so:

return Json(new { confirmation = operationConfirmation }, JsonRequestBehavior.AllowGet);

Then do this in your test method:

var js = new JavaScriptSerializer();
var deserializedTarget = (object[])js.DeserializeObject(target.Data.ToString());
var result = (string)deserializedTarget["confirmation"];

Then you can do:

Assert.AreEqual(expected, result);