System.nullreferenceexception: 'object reference not set to an instance of an object.' system.web.httpcontext.current.get returned null. During unit testing in MVC.

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Hello,

When i am running my Unit Test project,so its getting error from mvc application"

System.NullReferenceException: 'Object reference not set to an instance of an object.'

System.Web.HttpContext.Current.get returned null.

"

I have tried in MVC Application.
Please help me.

Thanks in Advance.

Ankit Agarwal
Software Engineer

What I have tried:

//Arrange
            GCopaDimensionsController gCopaDimensionsController = new GCopaDimensionsController();
            //gCopaDimensionsController.ControllerContext = context.Object;

            //Act
            ViewResult result = gCopaDimensionsController.Index() as ViewResult;
            //Assert
            Assert.AreEqual("Manage Global Copa Dimension", gCopaDimensionsController.Session["Title"]);
            //Assert.Fail();

Posted 6-Jul-18 2:18am

Agarwal1984

Updated 6-Jul-18 2:37am

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F-ES Sitecore · Answer 1 · 2018-07-06T02:37:00

You get an error but don't tell us what line it is on so I'm not sure what kind of help you are expecting. However from the error message it seems somewhere in the code you haven't posted you are using "System.Web.HttpContext.Current", however your unit test is running in the context of your test runner, not a web server, so there is no HttpContext so .Current will return null.

Not all code is unit testable, in order to make it testable you have to write it in a way that doesn't rely directly on external environmental things like databases, files, http context etc.

To make your code testable you'll need to refactor it so things like access to the Session are abstracted using interfaces and dependency injection which will allow your unit tests to mock the Session for testing purposes. If you google "asp.net unit test session" you'll probably find examples of the kind of things you need to do. Making your code unit testable is not a trivial task.