I'm attempting to run a couple basic unit tests on an ASP MVC controller, however at one point the controller needs to examine the IPrincipal
User
object like so:
ViewBag.Level = Security.GetLevel(User);
Once the unit test enters the Create
controller method, however, the above line throws a NullReferenceException
as the User
object is null
.
Any ideas on how to set an IPrincipal
for a unit test session?
Here's the test as I have it written right now. I attempted to access the User
object and simply set it before the test goes into the Create
method, however the intellisense isn't picking it up.
[Test]
public void a06_CloneFromDatabase()
{
using (AgentResources db = new AgentResources())
{
var master = (from a in db.AgentTransmission
where a.RecordStatus.Equals("C")
select a).FirstOrDefault();
var result = _controlAgtTran.Create(master.ID, null, string.Empty, string.Empty, string.Empty, string.Empty, false) as ViewResult;
var model = result.Model as AgentTransmission;
Assert.AreEqual(model.ReferenceType, master.ReferenceType);
}
}
EDIT
Following the post mentioned in the comments below I found a method to create a HttpContext
session and apply and IPrincipal
to that session. This works fine until the unit test moves into the controller where the HttpContext
and IPrincipal
User
objects are all, once again, null.
Since it seems the instance of the controller I'm using has it's HttpContext
property as read only (and the IPrincipal
User
property as well) does anyone know of a way to pass the HttpContext
being used in the unit test inside the controller being tested? Also, if this is not possible, what is a usable method for testing RouteValues
using ReSharper's unit tests?
[SetUp]
public void SetUp()
{
_controlAgtTran = new AgentTransmissionController();
/****Set up Current HTTP Context to pass Security.cs checks*****/
//Set up the HTTP Request
var httpRequest = new HttpRequest("", "http://localhost:2574/", "");
//Set up the HTTP Response
var httpResponse = new HttpResponse(new StringWriter());
//Set up the HTTP Context
var httpContext = new HttpContext(httpRequest, httpResponse);
var sessionContainer = new HttpSessionStateContainer("NEAROD",
new SessionStateItemCollection(),
new HttpStaticObjectsCollection(),
100,
true,
HttpCookieMode.AutoDetect,
SessionStateMode.InProc,
false);
httpContext.Items["AspSession"] =
typeof (HttpSessionState)
.GetConstructor(
BindingFlags.NonPublic | BindingFlags.Instance,
null,
CallingConventions.Standard,
new[] {typeof (HttpSessionStateContainer)},
null)
.Invoke(new object[] {sessionContainer});
//Assign the context
HttpContext.Current = httpContext;
}
[Test]
public void a01_IncompleteRecordGoesToEdit()
{
AgentTransmission agtTran = new AgentTransmission();
agtTran.ReferenceNumber = 95820518787;
agtTran.ReferenceType = "S";
agtTran.EffectiveDate = DateTime.Now;
agtTran.RelationshipEffDate = DateTime.Now;
agtTran.RecordStatus = "N";
agtTran.CreatedDate = DateTime.Now;
agtTran.CreatedOperator = "xTest1";
agtTran.FirstName = "Unit";
agtTran.LastName = "Test";
agtTran.ExtRepType = "EXTREPID";
agtTran.JIT = true;
agtTran.SendToDRM = true;
agtTran.SendToNMF = true;
agtTran.WelcomeLetter = true;
agtTran.OverrideRegionInd = false;
//set IPrincipal
string[] roles = {"LCO"};
IPrincipal principal = new GenericPrincipal(new GenericIdentity("SYMETRA\\NEAROD"), roles);
HttpContext.Current.User = principal;
IPrincipal user = HttpContext.Current.User;
Assert.AreEqual(user, principal); //This passes
Assert.AreEqual(principal, _controlAgtTran.User); //this fails
var result = (RedirectToRouteResult)_controlAgtTran.Create(agtTran); //this crashes
//Tests aren't run
Assert.IsNotNull(result);
Assert.AreEqual(3, result.RouteValues.Count);
Assert.AreEqual("AgentTransmission", result.RouteValues["controller"]);
Assert.AreEqual("Edit", result.RouteValues["action"]);
}
Following a similar solution mentioned in this post I added the following to the end of the SetUp()
method.
var controllerCtx = new ControllerContext();
controllerCtx.HttpContext = new HttpContextWrapper(HttpContext.Current);
_controlAgtTran.ControllerContext = controllerCtx;
Wrapping the current HttpContext
inside an HttpContextBase
property (the inappropriately named controllerCtx.HttpContext
) the test now has access to the User
and HttpContext
properties of the controller. These properties were previously read-only when using just the HttpContext.Current
session and therefore always null.
FYI - this is my first time unit testing with these objects so that explanation may be less than 100% correct. Please feel free to comment below and I'll make any necessary changes.