How to Unit Test JsonResult and Collections in MSTest

Question

I am very new to unit testing even though i have been coding for a very long time. I want to make this a part of my way of development. I run into blocks on how to unit test things like a collection. I generally have my jQuery script calling ASP.Net Server side methods to get data and populate tables and the like. They look like

Get_*Noun*()  

which generally returns a JsonResult. Any ideas on what and how to test these using Unit tests using MSTest?

Answer 1

You should be able to test this just like anything else, provided you can extract the values from the JsonResult. Here's a helper that will do that for you:

private T GetValueFromJsonResult<T>(JsonResult jsonResult, string propertyName) {     var property =         jsonResult.Data.GetType().GetProperties()         .Where(p => string.Compare(p.Name, propertyName) == 0)         .FirstOrDefault();      if (null == property)         throw new ArgumentException("propertyName not found", "propertyName");     return (T)property.GetValue(jsonResult.Data, null); } 

Then call your controller as usual, and test the result using that helper.

var jsonResult = yourController.YourAction(params); bool testValue = GetValueFromJsonResult<bool>(jsonResult, "PropertyName"); Assert.IsFalse(testValue);