Mvc 5 Tests - Set Controller Summing Value
I have an index page that can have a ViewBag
last search value . I want to customize my controller so I can set this value ViewBag
before calling my system under test ( ProductManagementController
)
Index action
[HttpPost]
public async Task<ActionResult> Index(ProductManagementVm postedVm)
{
// Reset pagination if new search
if (postedVm.BookSearch != ViewBag.lastSearch)
{
postedVm.Page = 1;
}
var httpResponseMessage = await_httpService.GetAsync(_urlConfigurations.GetProductList);
var vm = _productFactory.BuildProductManagementVm(
await Task.Run(() => httpResponseMessage.Content.ReadAsStringAsync()), postedVm);
vm.BookSearch = postedVm.BookSearch;
if (string.IsNullOrEmpty(postedVm.BookSearch))
{
postedVm.BookSearch = string.Empty;
}
ViewBag.lastSearch = postedVm.BookSearch;
return View(vm);
}
Installation class
using System.ComponentModel.DataAnnotations;
using System.Net.Http;
using System.Web.Mvc;
using ICEBookshop.MVC.App.Controllers;
using ICEBookshop.MVC.App.Interfaces;
using ICEBookshop.MVC.App.Interfaces.Factories;
using ICEBookshop.MVC.App.Models;
using ICEBookshop.MVC.App.Models.ViewModels;
using Moq;
using SpecsFor;
namespace ICEBookshop.MVC.App.Tests.Controllers.ProductManagement
{
public class BaseGiven : SpecsFor<ProductManagementController>
{
protected Mock<IHttpService> HttpServiceMock = new Mock<IHttpService>();
protected Mock<IProductFactory> ProductFactoryMock = new Mock<IProductFactory>();
protected Mock<IUrlConfigurations> UrlConfigurationsMock = new Mock<IUrlConfigurations>();
protected Mock<IJsonValidator> JsonValidatorMock = new Mock<IJsonValidator>();
protected ProductManagementController ProductManagementController;
protected HttpResponseMessage HttpResponseMessage;
protected string JsonContent;
protected bool IsModelStateValid;
protected ActionResult ActionResult;
protected RedirectToRouteResult RedirectToRouteResult;
protected ViewResult ViewResult;
protected ProductManagementVm ProductManagementVm;
protected ProductViewModel ProductViewModel;
protected void BaseGivenSetup()
{
ProductManagementController = new ProductManagementController(HttpServiceMock.Object,
ProductFactoryMock.Object, UrlConfigurationsMock.Object, JsonValidatorMock.Object);
SUT = ProductManagementController;
}
}
}
I would like to install ProductManagementController.ViewBag.SomeName = "some string"
, so when I enter the controller I am testing this scenario, but at the moment it is null
.
Does anyone know how to set a ViewBag
controller value before testing it?
Unit test
public class WhenServiceReturnProductsAndViewBagHasSearchString : GivenGoingToIndexActionInProductsManagement
{
protected override void When()
{
HttpResponseMessage = new HttpResponseMessage
{
StatusCode = HttpStatusCode.OK,
Content = new StringContent("some string content from the service")
};
HttpServiceMock.Setup(expr => expr.GetAsync(It.IsAny<string>())).ReturnsAsync(HttpResponseMessage);
ProductFactoryMock.Setup(
expr => expr.BuildProductManagementVm(It.IsAny<string>(), It.IsAny<ProductManagementVm>()))
.Returns(new ProductManagementVm());
// This doesn't work :(
SUT.ViewBag.LastSearch = "Hey I'm a search string :D";
BaseGivenSetup();
ActionResult = SUT.Index(new ProductManagementVm()).Result;
ViewResult = (ViewResult)ActionResult;
ProductManagementVm = (ProductManagementVm)ViewResult.Model;
}
[Test]
public void ThenActionResultIsNotNull()
{
Assert.IsNotNull(ActionResult);
}
[Test]
public void ThenAViewResultIsNotNull()
{
Assert.IsNotNull(ViewResult);
}
[Test]
public void ThenProductManagementVmIsNotNull()
{
Assert.IsNotNull(ProductManagementVm);
}
}
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ViewBag gets its data from propertyViewData
public dynamic ViewBag
{
get
{
if (_dynamicViewDataDictionary == null)
{
_dynamicViewDataDictionary = new DynamicViewDataDictionary(() => ViewData);
}
return _dynamicViewDataDictionary;
}
}
So you need to fill in the value you want in order to be able to access it in ViewBag
Here is the POC
[TestClass]
public class ViewBagTests {
[TestMethod]
public void ViewBag_ShouldBe_PrePopulated() {
//Arrange
var SUT = new TargetController();
var expected = "Hey I'm the old search string :D";
SUT.ViewData["LastSearch"] = expected;
//Act
var actual = SUT.Index() as ViewResult;
//Assert
Assert.AreEqual(expected, actual.Model);
}
class TargetController : Controller {
public ActionResult Index() {
var previous = ViewBag.LastSearch;
return View((object)previous);
}
}
}
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