Mock MVC WebViewPage using Moq - unit-testing

I would like to mock a WebViewPage and compare the output with an expected result.
here are my mockhelpers I'm using
public static class MockHelpers
{
public static HttpContextBase MockHttpContext(NameValueCollection queryStringCollection = null)
{
var request = new Mock<HttpRequestBase>(MockBehavior.Strict);
if(queryStringCollection != null)
SetupMockRequestQuerystringValues(request, queryStringCollection);
request.SetupGet(x => x.ApplicationPath).Returns("/");
request.SetupGet(x => x.Url).Returns(new Uri("http://localhost/a", UriKind.Absolute));
request.SetupGet(x => x.ServerVariables).Returns(new System.Collections.Specialized.NameValueCollection());
var response = new Mock<HttpResponseBase>(MockBehavior.Strict);
response.Setup(x => x.ApplyAppPathModifier(Moq.It.IsAny<String>())).Returns((String url) => url);
// response.SetupGet(x => x.Cookies).Returns(new HttpCookieCollection()); // This also failed to work
var context = new Mock<HttpContextBase>(MockBehavior.Strict);
context.SetupGet(x => x.Request).Returns(request.Object);
context.SetupGet(x => x.Response).Returns(response.Object);
context.SetupGet(x => x.Response.Cookies).Returns(new HttpCookieCollection()); // still can't call the Clear() method
context.SetupGet(p => p.User.Identity.Name).Returns("blah");
context.SetupGet(p => p.User.Identity.IsAuthenticated).Returns(true);
return context.Object;
}
private static void SetupMockRequestQuerystringValues( Mock<HttpRequestBase> request, NameValueCollection queryStringCollection)
{
request.SetupGet(x => x.QueryString).Returns(queryStringCollection);
}
public static ViewContext MockViewContext()
{
return CreateSimpleGenericMock<ViewContext>();
}
public static T MockWebViewPage<T>() where T : WebViewPage
{
var mock = new Mock<T>(MockBehavior.Loose) { CallBase = true };
mock.SetupGet(x => x.Context).Returns(MockHttpContext());
mock.SetupGet(x => x.Layout).Returns("layoutName");
mock.SetupGet(x => x.VirtualPath).Returns("virtualPathName");
mock.SetupGet(x => x.Page).Returns(new object{});
mock.SetupGet(x => x.PageData).Returns(new Dictionary<object, dynamic>()
{
{new object(), new object()}
});
var page = mock.Object;
//var helper = new HtmlHelper<object>(new ViewContext { ViewData = CreateSimpleGenericMock<ViewDataDictionary>() }, page, CreateSimpleGenericMock<RouteCollection>());
var helper = new HtmlHelper<object>(new ViewContext { ViewData = new ViewDataDictionary() }, page, new RouteCollection());
page.ViewContext = MockViewContext();
page.Html = helper;
return page;
}
public static T CreateSimpleGenericMock<T>() where T : class
{
var mock = new Mock<T>();
return mock.Object;
}
}
In the MockWebViewPage method you can see all that I have faked. My test method looks like so
[TestMethod]
public void TestMethod1()
{
var coreMasterTestClass = MockHelpers.MockWebViewPage<CoreMaster<object>>();
coreMasterTestClass.ExecutePageHierarchy();
var output = coreMasterTestClass.Html;
}
Is it possible to test the output that will be generated with mocking, and if not does anyone have any possible clues how I could test this. Please note that I'm not testing actual chstml pages but core pages within our own framework.

Related

How to mock IdentityServerDbContext to add ApplicationUser

I tried following code but it's give exceptions:
var mockIdsDbContext = new Mock<IdentityServerDbContext>();
var applicationUser = new ApplicationUser()
{
Id = Guid.NewGuid().ToString(),
Email = "shashikant0423#gmail.com",
PhoneNumber = "999999999"
};
var usersTestData = new List<ApplicationUser>() { applicationUser };
var users = MockDbSet(usersTestData);
mockIdsDbContext.Setup(x => x.Users).Returns(userManager.Object.Users);
Mock<DbSet<T>> MockDbSet<T>(IEnumerable<T> list) where T : class, new()
{
IQueryable<T> queryableList = list.AsQueryable();
Mock<DbSet<T>> dbSetMock = new Mock<DbSet<T>>();
dbSetMock.As<IQueryable<T>>().Setup(x => x.Provider).Returns(queryableList.Provider);
dbSetMock.As<IQueryable<T>>().Setup(x => x.Expression).Returns(queryableList.Expression);
dbSetMock.As<IQueryable<T>>().Setup(x => x.ElementType).Returns(queryableList.ElementType);
dbSetMock.As<IQueryable<T>>().Setup(x => x.GetEnumerator()).Returns(() => queryableList.GetEnumerator());
//dbSetMock.Setup(x => x.Create()).Returns(new T());
return dbSetMock;
}
but I got error like:
Can not instantiate proxy of class: RenewPlus.IdentityServer.Data.IdentityServerDbContext. Could not find a parameterless constructor
Instead of mocking the rather complex DbContext I'd recommend instead using the Microsoft.EntityFrameworkCore.InMemory driver.
https://learn.microsoft.com/en-us/ef/core/providers/in-memory/

Unit tests - entity framework

I use NUnitAdapter. I have unit test for my update method:
[Test]
public void UpdateBuisness()
{
var buis = new Buisness()
{
Name = "a",
Id = 4,
Enabled = true
};
_buisnessRepository.Insert(buis);
buis.Name = "b";
_buisnessRepository.Update(buis);
Assert.AreEqual(buis.Name, _buisnesses.Last().Name);
}
Update method:
public void Update(Buisness entity)
{
_context.Entry(entity).State = EntityState.Modified;
}
And I get error:
This is weird, because for my co-workers all works.
My mock:
var mockBuisnessesDbSet = new Mock<DbSet<Buisness>>();
mockBuisnessesDbSet.As<IQueryable<Buisness>>().Setup(m => m.Provider)
.Returns(new TestDbAsyncQueryProvider<Buisness>(_buisnesses.Provider));
mockBuisnessesDbSet.As<IQueryable<Buisness>>().Setup(m => m.Expression).Returns(_buisnesses.Expression);
mockBuisnessesDbSet.As<IQueryable<Buisness>>().Setup(m => m.ElementType).Returns(_buisnesses.ElementType);
mockBuisnessesDbSet.As<IDbAsyncEnumerable<Buisness>>()
.Setup(m => m.GetAsyncEnumerator())
.Returns(new TestDbAsyncEnumerator<Buisness>(_buisnesses.GetEnumerator()));
mockBuisnessesDbSet.As<IQueryable<Buisness>>().Setup(m => m.GetEnumerator()).Returns(_buisnesses.GetEnumerator());
mockBuisnessesDbSet.Setup(x => x.Add(It.IsAny<Buisness>()))
.Callback((Buisness bis) => _buisnesses = _buisnesses.Concat(new[] { bis }));
mockBuisnessesDbSet.Setup(x => x.Remove(It.IsAny<Buisness>()))
.Callback((Buisness bis) => _buisnesses = _buisnesses.Where(x => x.Id != bis.Id));
_mockContex = new Mock<ApplicationDbContext>() { CallBase = true };
_mockContex.Setup(x => x.Buisnesses).Returns(mockBuisnessesDbSet.Object);
_buisnessRepository = new BuisnessRepository(_mockContex.Object);
I have no idea what is causing this.

ASP.NET Core unit test authorization

I try to create unit testing my authorization logic, but have problem for testing
await this.HttpContext.Authentication.SignInAsync(CookieAuthenticationDefaults.AuthenticationScheme, new ClaimsPrincipal(new ClaimsIdentity(claims, CookieAuthenticationDefaults.AuthenticationScheme)));
I have error
No authentication handler is configured to handle the scheme: Cookies
Because he need CookieAuthenticationOptions
But how configuration for unit test I don't know
private static Mock<SignInManager<User>> GetSignInManagerMock(Mock<UserManager<User>> userManagerMock)
{
var context = new Mock<HttpContext>();
var contextAccessor = new Mock<IHttpContextAccessor>();
contextAccessor.Setup(x => x.HttpContext).Returns(context.Object);
return new Mock<SignInManager<User>>(userManagerMock.Object,
contextAccessor.Object,
new Mock<IUserClaimsPrincipalFactory<User>>().Object,
new Mock<IOptions<IdentityOptions>>().Object,
new Mock<ILogger<SignInManager<User>>>().Object);
}
private static Mock<UserManager<User>> GetUserManagerMock()
{
return new Mock<UserManager<User>>(new Mock<IUserStore<User>>().Object,
new Mock<IOptions<IdentityOptions>>().Object,
new Mock<IPasswordHasher<User>>().Object,
new IUserValidator<User>[0],
new IPasswordValidator<User>[0],
new Mock<ILookupNormalizer>().Object,
new Mock<IdentityErrorDescriber>().Object,
new Mock<IServiceProvider>().Object,
new Mock<ILogger<UserManager<User>>>().Object);
}
[Fact]
public async void Login_Corect_input_login_password_should_return_ok()
{
var stamp = Guid.NewGuid().ToString();
var user = new User
{
UserName = _fakeUserModel.UserName,
Email = _fakeUserModel.Email,
FirtName = _fakeUserModel.FirstName,
LastName = _fakeUserModel.LastName,
UserPicture = _fakeUserModel.UserPicture,
ConcurrencyStamp = stamp
};
var userManagerMock = GetUserManagerMock();
userManagerMock.Setup(s => s.FindByNameAsync(FakeData.UserName)).ReturnsAsync(user);
userManagerMock.Setup(s => s.GetRolesAsync(user)).ReturnsAsync(FakeData.Roles);
var signInManagerMock = GetSignInManagerMock(userManagerMock);
signInManagerMock.Setup(
s =>
s.PasswordSignInAsync(_fakeCorrectloginModel.UserName, _fakeCorrectloginModel.Password, false,
false))
.ReturnsAsync(Microsoft.AspNetCore.Identity.SignInResult.Success);
var controller = ControllerFactory.CreateFakeController<UserController>(false, userManagerMock.Object,
signInManagerMock.Object);
var response = await controller.Login(_fakeCorrectloginModel);
var result = Assert.IsType<JsonResult>(response);
var getModel = Assert.IsType<UserViewModel>(result.Value);
Assert.Equal(_fakeUserModel, getModel);
}
public static class ControllerFactory
{
public static T CreateFakeController<T>(bool isLoggedIn, params object[] arg) where T : Controller
{
var fakePrincipal = GetPrincipalMock(isLoggedIn).Object;
var fakeActionContext = new ActionContext
{
HttpContext = new DefaultHttpContext
{
User = fakePrincipal
},
ActionDescriptor = new ControllerActionDescriptor(),
RouteData = new RouteData()
};
var controller = (T)Activator.CreateInstance(typeof(T), arg);
controller.ControllerContext = new ControllerContext(fakeActionContext);
return controller;
}
public static Mock<ClaimsPrincipal> GetPrincipalMock(bool isLoggedIn)
{
var principalMock = new Mock<ClaimsPrincipal>();
principalMock.Setup(sg => sg.Identity).Returns(GetIdentityMock(isLoggedIn).Object);
principalMock.Setup(s => s.IsInRole(It.IsAny<string>())).Returns(false);
principalMock.Setup(s => s.Claims).Returns(new List<Claim>
{
GetClaim(HelpClaimTypes.Language, "ua")
});
return principalMock;
}
public static Mock<ClaimsIdentity> GetIdentityMock(bool isLoggedIn)
{
var identityMock = new Mock<ClaimsIdentity>();
identityMock.Setup(sg => sg.AuthenticationType).Returns(isLoggedIn ? FakeData.AuthenticationType : null);
identityMock.Setup(sg => sg.IsAuthenticated).Returns(isLoggedIn);
identityMock.Setup(sg => sg.Name).Returns(isLoggedIn ? FakeData.UserName : null);
return identityMock;
}
public static ClaimsIdentity GetClaimsIdentity(params Claim[] claims)
{
var identityMock = new ClaimsIdentity(claims);
return identityMock;
}
public static Claim GetClaim(string type, string value)
{
return new Claim(type, value);
}
}

Unit testing a controller action method using MOQ

I have the following controller action method.
[HttpPost]
public ActionResult CreateProvider(Provider provider)
{
try
{
int providerCreationSuccessful = _repository.CreateProvider(provider);
if (providerCreationSuccessful == 2)
TempData["userIntimation"] = "Provider Registered Successfully";
//return RedirectToAction("ShowTheListOfProviders");
}
catch (Exception Ex)
{
_logger.Error(Ex.Message);
return View("Error");
}
return Json(new { url = Url.Action("ShowTheListOfProviders", "Provider") });
}
I had written the following Test case for the above method,which was working
[TestMethod()]
public void CreateProviderTest()
{
mockProviderRepository.Setup(provider => provider.CreateProvider(_provider)).Returns(new int());
var providerCreationResult = _providerController.CreateProvider(_provider) as ActionResult;
Assert.IsNotNull(providerCreationResult);
}
As can be seen from my code in the action method,I am redirecting using AJAX,hence returning JSON of the url to be redirected to.
Now,the test is obviously failing.I am new to unit tests and was wondering,what updates I needed to make to the Testmethod for it to pass.Please guide me.Thanks.
If you want test the Json Result contains the expected URL, you can write a test like below.
[TestMethod]
public void CreateProvider_Execute_EnsureJsonContainsExpectedUrl()
{
var context = new Mock<HttpContextBase>();
var request = new Mock<HttpRequestBase>();
var response = new Mock<HttpResponseBase>();
context.Setup(ctx => ctx.Request).Returns(request.Object);
context.Setup(ctx => ctx.Response).Returns(response.Object);
request.SetupGet(x => x.ApplicationPath).Returns("/");
request.SetupGet(x => x.Url).Returns(new Uri("http://localhost/a", UriKind.Absolute));
response.Setup(x => x.ApplyAppPathModifier(It.IsAny<string>())).Returns<string>(x => x);
context.SetupGet(x => x.Request).Returns(request.Object);
context.SetupGet(x => x.Response).Returns(response.Object);
RouteConfig.RegisterRoutes(new RouteCollection());
var repoStub = new Mock<IRepository>();
repoStub.Setup(x => x.CreateProvider(new Provider())).Returns(1);
var sut = new HomeController(repoStub.Object, new Mock<ILogger>().Object);
sut.Url = new UrlHelper(new RequestContext(context.Object, new RouteData()), routes);
var result = sut.CreateProvider(new Provider()) as JsonResult;
var actualUrl = GetValueFromJsonResult<string>(result, "url");
Assert.AreEqual<string>("/Provider/ShowTheListOfProviders", actualUrl);
}
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);
}

Unit testing generic htmlHelper methods with nunit

I'm new to nUnit and I've been tasked with creating unit tests for some htmlhelper extension methods.
How should I go about creating a unit test for the following method?
public static MvcHtmlString EnumDropDownListForOrderBy<TModel, TEnum>(this HtmlHelper<TModel> htmlHelper, Expression<Func<TModel, TEnum>> expression, bool orderById, string firstElement = null, object htmlAttributes = null)
{
ModelMetadata metadata = ModelMetadata.FromLambdaExpression(expression, htmlHelper.ViewData);
Type enumType = GetNonNullableModelType(metadata);
IEnumerable<TEnum> values = Enum.GetValues(enumType).Cast<TEnum>();
IEnumerable<SelectListItem> items = values.Select(value => new SelectListItem()
{
Text = value.GetAttributeFrom<DescriptionAttribute>(value.ToString()).Description,
Value = value.ToString(),
Selected = value.Equals(metadata.Model)
});
IEnumerable<SelectListItem> itemsFiltered = items.Where(e => !string.IsNullOrEmpty(e.Text)).AsEnumerable();
itemsFiltered = itemsFiltered.OrderBy(e => (orderById ? e.Text : e.Value));
return htmlHelper.DropDownListFor(
expression,
itemsFiltered,
firstElement,
htmlAttributes
);
}
Any help would be appreciated
Below is how you write a Unit Test for this. Note that since you have not specified that you use a Mock object framework I'm going to the poor man technique, which is the hand written stubs and mocks. There is also another helper method if you are using Moq.
It is important to note that, in order to simplify the code execution I have made couple of changes to your extension method, so the test would not fail unexpectedly. Checking for any unexpected behaver is a good defensive programming practice anyway.
Back to the tests.
SUT (System Under Test)
This is how the SUT (System Under Test) looks like and supporting types looks like. (Please feel free to modify to your need accordingly)
public static class MyHtmlHelper
{
public static MvcHtmlString EnumDropDownListForOrderBy<TModel, TEnum>
(this HtmlHelper<TModel> htmlHelper,
Expression<Func<TModel, TEnum>> expression,
bool orderById, string firstElement = null, object htmlAttributes = null,
Func<ModelMetadata> fromLambFunc = null)
{
ModelMetadata metadata =
ModelMetadata.FromLambdaExpression(expression, htmlHelper.ViewData);
Type enumType = GetNonNullableModelType(metadata);
IEnumerable<TEnum> values = Enum.GetValues(enumType).Cast<TEnum>();
IEnumerable<SelectListItem> items =
values.Select(value => new SelectListItem()
{
Text = GetText(value),
Value = value.ToString(),
Selected = value.Equals(metadata.Model)
});
IEnumerable<SelectListItem> itemsFiltered =
items.Where(e => !string.IsNullOrEmpty(e.Text)).AsEnumerable();
itemsFiltered = itemsFiltered.OrderBy(e => (orderById ? e.Text : e.Value));
return htmlHelper.DropDownListFor
(expression, itemsFiltered, firstElement, htmlAttributes);
}
private static Type GetNonNullableModelType(ModelMetadata metadata) {
return typeof (SomeEnum);
}
private static string GetText<TEnum>(TEnum value) {
return value.GetAttributeFrom<DescriptionAttribute>(value.ToString()) != null
? value.GetAttributeFrom<DescriptionAttribute>(value.ToString()).Description
: string.Empty;
}
}
public static class ExtensionMethodsAttr
{
public static T GetAttributeFrom<T>(this object instance, string propertyName)
where T : Attribute
{
var attrType = typeof(T);
var property = instance.GetType().GetProperty(propertyName);
return property != null ?
(T)property.GetCustomAttributes(attrType, false).First() : default(T) ;
}
}
public enum SomeEnum { A,}
Unit Tests
[TestFixture]
public class HtmlHelperTests
{
[Test]
public void EnumDropDownListForOrderBy_InvokeDropDownListFor_ReturnsExpectedSelectItemResult()
{
//Arrange
var expected = "<select id=\"Foo\" name=\"Foo\"></select>";
var fakeHtmlHelper = CreateHtmlHelperStaticStubs
(new ViewDataDictionary(new FakeViewModel() {Foo = SomeEnum.A}));
//var fakeHtmlHelper = CreateHtmlHelperUsingMoq
(new ViewDataDictionary(new FakeViewModel(){Foo = SomeEnum.A}));
//Act
var result = fakeHtmlHelper.EnumDropDownListForOrderBy
(model => model.Foo, It.IsAny<bool>(), null, null, null);
//Assert
Assert.AreEqual(expected, result.ToString());
}
private static HtmlHelper<FakeViewModel>
CreateHtmlHelperStaticStubs(ViewDataDictionary viewData)
{
var stubControllerContext = new ControllerContext(new FakeHttpContext(), new RouteData(), new FakeController());
var stubViewContext = new ViewContext(stubControllerContext, new FakeView(),
new ViewDataDictionary(new FakeViewModel() { Foo = SomeEnum.A }),
new TempDataDictionary(), new TextMessageWriter());
var fakeViewDataContainer = new FakeViewDataContainer();
fakeViewDataContainer.ViewData = viewData;
return new HtmlHelper<FakeViewModel>(stubViewContext, fakeViewDataContainer);
}
//Moq version
private static HtmlHelper<FakeViewModel>
CreateHtmlHelperUsingMoq(ViewDataDictionary viewData)
{
var stubControllerContext = new Mock<ControllerContext>();
stubControllerContext.Setup(x => x.HttpContext).Returns(new Mock<HttpContextBase>().Object);
stubControllerContext.Setup(x => x.RouteData).Returns(new RouteData());
stubControllerContext.Setup(x => x.Controller).Returns(new Mock<ControllerBase>().Object); ;
var stubViewContext = new Mock<ViewContext>();
stubViewContext.Setup(x => x.View).Returns(new Mock<IView>().Object);
stubViewContext.Setup(x => x.ViewData).Returns(viewData);
stubViewContext.Setup(x => x.TempData).Returns(new TempDataDictionary());
var mockViewDataContainer = new Mock<IViewDataContainer>();
mockViewDataContainer.Setup(v => v.ViewData).Returns(viewData);
return new HtmlHelper<FakeViewModel>(stubViewContext.Object, mockViewDataContainer.Object);
}
}
class FakeHttpContext : HttpContextBase
{
private Dictionary<object, object> _items = new Dictionary<object, object>();
public override IDictionary Items { get { return _items; } }
}
class FakeViewDataContainer : IViewDataContainer
{
private ViewDataDictionary _viewData = new ViewDataDictionary();
public ViewDataDictionary ViewData { get { return _viewData; } set { _viewData = value; } }
}
class FakeController : Controller { }
class FakeView : IView
{
public void Render(ViewContext viewContext, System.IO.TextWriter writer)
{
throw new NotImplementedException();
}
}
public class FakeViewModel {
public SomeEnum Foo { get; set; }
}