MockingKernel and Received throws an NotASubstituteException - ninject

I'm using NSubstituteMockingKernel in order to build all my dependencies of my library classes. I've been struggling to solve a trouble for a week and I'm really exhausted. I need some help.
This is my class:
class Core : ICoreService, ICore {
private ICoreConfiguration configuration;
Core(ICoreconfiguration configuration) {
this.configuration = configuration;
}
override ICoreService.ParentMethod() { //ICoreService implementation
foreach (Item item in this.configuration.Items)
this.ChildMethod();
}
virtual ChildMethod() {
//do something
}
}
ICoreService is:
interface ICoreService {
void ParentMethod();
}
ICore is:
interface ICore {
ICoreConfiguration Configuration { get; }
}
ICoreConfiguration is:
interface ICoreConfiguration {
IEnumerable<Item> Items { get; }
}
My test is:
[TestFixture]
public class UsersManagementTests
{
private readonly NSubstituteMockingKernel IoCKernel;
public UsersManagementTests()
{
this.IoCKernel = new NSubstituteMockingKernel();
}
[SetUp]
public void SetUp()
{
this.IoCKernel.Reset();
}
[Test(Description = "Configured Users are well loaded on Kernel")]
public void InitializationWithUsersTest()
{
//Setup Data
Item item = Item.Create("item1");
IEnumerable<Item> items = new List<Item>() { item };
//Setup Mocks
this.IoCKernel
.Get<ICoreConfiguration>()
.Items
.Returns(items);
Core core = this.IoCKernel.Get<Core>();
//Act
kernel.ParentMethod();
//Assert
IEnumerable<NSubstitute.Core.ICall> calls = kernel.ReceivedCalls(); // ((((((1))))))
kernel.Received(1).ChildMethod(); // ((((((2))))))
}
}
When ((((((1)))))) or ((((((2)))))) are reached, I'm getting this NSubstitute.Exceptions.NotASubstituteException exception message now on last line:
NSubstitute extension methods like .Received() can only be called on objects created using Substitute.For() and related methods.
As you can see I'm trying to test ChildMethod method is reached once at least. ChildMethod must be called according to my Core.Kernel implementation.
I will really appreciate some help.
Thanks.

Related

How to write Xunit test case of factory design pattern code block which is tightly coupled?

I would like to write xunit test case of below method. Could you please suggest alternate design so i can write xunit test case with minimum change in my current project.
public ActionResult Index(int id = 0, AssetFilterType filter = AssetFilterType.All)
{
using (var tracer = new Tracer("AssetController", "Index"))
{
RemoveReturnUrl();
ViewBag.JobId = id;
var response = ContextFactory.Current.GetDomain<EmployeeDomain>().GetEmployeeFilterAsync(id,
CurrentUser.CompanyId, filter); // Not able write unit test case , please suggest alternate design.
return View("View", response);
}
}
current design is as follow
public interface IDomain
{
}
public interface IContext
{
D GetDomain<D>() where D : IDomain;
string ConnectionString { get; }
}
public class ApplicationContext : IContext
{
public D GetDomain<D>() where D : IDomain
{
return (D)Activator.CreateInstance(typeof(D));
}
public string ConnectionString
{
get
{
return "DatabaseConnection";
}
}
}
public class ContextFactory
{
private static IContext _context;
public static IContext Current
{
get
{
return _context;
}
}
public static void Register(IContext context)
{
_context = context;
}
}
//var response = ContextFactory.Current.GetDomain**< EmployeeDomain>**().GetEmployeeFilterAsync(id,
CompanyId, filter);
This line serve purpose to call specific class method i.e GetEmployeeFilterAsync from EmployeeDomain. Although it is very handy and widely used in our application but due to design issue i am not able to write unit
test case.
Could you please suggest design so with the minimum change we can write unit test case.
Don't use the Service Locator anti-pattern, use Constructor Injection instead. I can't tell what AssetDomain is from the OP, but it seems as though it's the dependency that matters. Inject it into the class:
public class ProbablySomeController
{
public ProbablySomeController(AssetDomain assetDomain)
{
AssetDomain = assetDomain;
}
public AssetDomain AssetDomain { get; }
public ActionResult Index(int id = 0, AssetFilterType filter = AssetFilterType.All)
{
using (var tracer = new Tracer("AssetController", "Index"))
{
RemoveReturnUrl();
ViewBag.JobId = id;
var response = AssetDomain.GetAssetFilterAsync(id, CurrentUser.CompanyId, filter);
return View("View", response);
}
}
}
Assuming that AssetDomain is a polymorphic type, you can now write a test and inject a Test Double:
[Fact]
public void MyTest()
{
var testDouble = new AssetDomainTestDouble();
var sut = new ProbablySomeController(testDouble);
var actual = sut.Index(42, AssetFilterType.All);
// Put assertions here
}
step1 : Required library
step 2 : When the application starts , register required domain like
protected void Application_Start()
UnityConfig.RegisterComponents();
Step 3: create one static class and register all your domain
example
public static class UnityConfig
{
public static void RegisterComponents()
{
var container = new UnityContainer();
Initialize domain which will injected in controller
container.RegisterType<IPricingDomain, PricingDomain>();
GlobalConfiguration.Configuration.DependencyResolver = new UnityDependencyResolver(container);
}
}
step 4 :
so you can inject respective interface in constructor
in controller file.
goal : get rid of below any pattern in your project.
and start writing unit test cases.

ASPNET CORE - Can I add a ControllerModel in a IApplicationModelConvention?

I'm trying to add controllers dynamically, the catch is that their actions are also dynamic, so I can't simply use a generic controller.
I dug through msdn and found that overriding the method Apply#IApplicationModelConvention seems to be my best option. However, the controller I add is never found by the routing system.
This is what I tried:
public void ConfigureServices(IServiceCollection services)
{
services.AddMvc(opts =>
{
opts.Conventions.Add(new ApplicationDescription("mdesc"));
opts.Conventions.Add(new ControllerDescription("mctrl"));
})
...
}
public class ApplicationDescription : IApplicationModelConvention
{
private readonly string _description;
public ApplicationDescription(string description)
{
_description = description;
}
public void Apply(ApplicationModel application)
{
var basec = application.Controllers[0];
var cm = new ControllerModel(typeof(MyController).GetTypeInfo(), basec.Attributes);
application.Controllers.Add(cm);
application.Properties["description"] = _description;
}
}
Source: https://learn.microsoft.com/en-us/aspnet/core/mvc/controllers/application-model?view=aspnetcore-2.0

Pass data from android service to ContentPage in Xamarin Form based application

I am having one Application based on XamarinForms.
One background service I have created in Android project and that service would like to send data to ContentPage(which is in PCL) which is displayed to user.
How could I pass data to ContentPage(From xx.Droid project to PCL)?
One solution is:
To Create class in PCL with static variable(e.g. var TEMP_VAR), which will be accessed from xxx.Droid project.
Update value of that static variable(TEMP_VAR) from the service class from the xxx.Droid project.
Need to create Notifier on that static variable(TEMP_VAR)
Update the content page using MessageCenter Mechanism if require.
If there is any better solution, could you please provide me?
This can be achieved using the concept of C#
Dependency service
Event
Need to have 4 classes for such an implementation:
Interface in PCL(e.g. CurrentLocationService.cs) with event handlers defined in it.
namespace NAMESPACE
{
public interface CurrentLocationService
{
void start();
event EventHandler<PositionEventArgs> positionChanged;
}
}
Implementation of interface of PCL in xxx.Droid project (e.g. CurrentLocationService_Android.cs) using Dependency service
class CurrentLocationService_Android : CurrentLocationService
{
public static CurrentLocationService_Android mySelf;
public event EventHandler<PositionEventArgs> positionChanged;
public void start()
{
mySelf = this;
Forms.Context.StartService(new Intent(Forms.Context, typeof(MyService)));
}
public void receivedNewPosition(CustomPosition pos)
{
positionChanged(this, new PositionEventArgs(pos));
}
}
ContentPage in PCL - which will have object of implementation of interface.
Object can be obtained by
public CurrentLocationService LocationService
{
get
{
if(currentLocationService == null)
{
currentLocationService = DependencyService.Get<CurrentLocationService>();
currentLocationService.positionChanged += OnPositionChange;
}
return currentLocationService;
}
}
private void OnPositionChange(object sender, PositionEventArgs e)
{
Debug.WriteLine("Got the update in ContentPage from service ");
}
Background service in xxx.Droid project. This service will have reference of implementation of dependency service CurrentLocationService.cs
[Service]
public class MyService : Service
{
public string TAG = "MyService";
public override IBinder OnBind(Intent intent)
{
throw new NotImplementedException();
}
public override StartCommandResult OnStartCommand(Android.Content.Intent intent, StartCommandFlags flags, int startId)
{
Log.Debug(TAG, TAG + " started");
doWork();
return StartCommandResult.Sticky;
}
public void doWork()
{
var t = new Thread(
() =>
{
Log.Debug(TAG, "Doing work");
Thread.Sleep(10000);
Log.Debug(TAG, "Work completed");
if(CurrentLocationService_Android.mySelf != null)
{
CustomPosition pos = new CustomPosition();
pos.update = "Finally value is updated";
CurrentLocationService_Android.mySelf.receivedNewPosition(pos);
}
StopSelf();
});
t.Start();
}
}
Note : PositionEventArgs class need to be created as per usage to pass on data between service and ContentPage.
This works for me like charm.
Hope so this would be helpful to you.

Can't get Ninject.Extensions.Interception working

I've been trying for ages to figure this our. when i try to bind my class with an interceptor i'm getting the following exception on the line
Kernel.Bind<MyClass>().ToSelf().Intercept().With<ILoggerAspect>();
Error loading Ninject component IAdviceFactory. No such component has been registered in the kernel's component container
I've tried with and without LoadExtensions, With about with using a Module to set up my bindings and my last attempt looks like this
internal class AppConfiguration
{
internal AppConfiguration( )
{
var settings = new NinjectSettings() { LoadExtensions = false };
Kernel = new StandardKernel(settings);
Load();
}
internal StandardKernel Kernel { get; set; }
public static AppConfiguration Instance
{
get { return _instance ?? (_instance = new AppConfiguration()); }
}
private static AppConfiguration _instance;
private void Load()
{
Kernel.Bind<ILoggerAspect>().To<Log4NetAspect>().InSingletonScope();
Kernel.Bind<MyClass>().ToSelf().Intercept().With<ILoggerAspect>();
}
internal static StandardKernel Resolver()
{
return Instance.Kernel;
}
}
My Logger Attribute looks like this
public class LogAttribute : InterceptAttribute
{
public override IInterceptor CreateInterceptor(IProxyRequest request)
{
return request.Context.Kernel.Get<ILoggerAspect>();
}
}
And my interceptor like this
public class Log4NetAspect : SimpleInterceptor, ILoggerAspect
{
protected override void BeforeInvoke(IInvocation invocation)
{
Debug.WriteLine("Running " + invocation.ReturnValue);
base.BeforeInvoke(invocation);
}
public new void Intercept(IInvocation invocation)
{
try
{
base.Intercept(invocation);
}
catch (Exception e)
{
Debug.WriteLine("Exception: " + e.Message);
}
}
protected override void AfterInvoke(IInvocation invocation)
{
Debug.WriteLine("After Method");
base.AfterInvoke(invocation);
}
}
Most likely you didn't deploy Ninject.Extensions.Interception.DynamicProxy or Ninject.Extensions.Interception.Linfu alongside your application [and Ninject.Extensions.Interception]. You have to pick exactly one of them.
With the code as you have it right now (LoadExtensions=false) it will fail to pick up the specific interception library - you should remove that and the normal extensions loading should wire the extension into the Kernel on creation for the interception bits to pick it up.
In addition to Remo Gloor's answer which pointed me toward adding the nuget package for Ninject.Extensions.Interception.DynamicProxy, I kept getting the same exception as the OP, until I manually loaded a DynamicProxyModule - the FuncModule is manually loaded as well, to work around a similar error involving the factory extension:
_kernel = new StandardKernel(
new NinjectSettings{LoadExtensions = true},
new FuncModule(),
new DynamicProxyModule()); // <~ this is what fixed it

Simplest way to mock properties of PostSharp attribute

I'm using a PostSharp method attribute to do authorisation and auditing on my WCF service. It's working properly but now I'm trying to get my unit tests working with the attribute and am struggling to find a way to mock and inject the properties on the attribute.
My attribute is as below.
[Serializable]
[AttributeUsage(AttributeTargets.Method, AllowMultiple = false, Inherited = false)]
public class AuthoriseAndAuditAttribute : OnMethodBoundaryAspect
{
private static ILog logger = AppState.logger;
private static Ninject.IKernel _kernel = MyKernel.Kernel;
private UserRoleTypesEnum _requiredRole = UserRoleTypesEnum.None;
[Inject]
public IServiceAuthToken _serviceAuthToken { get; set; }
[Inject]
public UserSessionDataLayer _userSessionDataLayer { get; set; }
public AuthoriseAndAuditAttribute(UserRoleTypesEnum role = UserRoleTypesEnum.None)
{
_requiredRole = role;
_kernel.Inject(this);
}
public override void OnEntry(MethodExecutionArgs args)
{
// Get the user's session from cookie.
UserSession userSession = GetUserSession();
// Check that user is in the required role.
bool isAuthorised = (_requiredRole == UserRoleTypesEnum.None || (userSession != null && userSession.Roles.Contains(_requiredRole)));
if (!isAuthorised)
{
logger.Warn("Not authorised for " + args.Method.Name + ".");
throw new UnauthorizedAccessException();
}
else if (userSession != null)
{
Thread.CurrentPrincipal = new MyPrincipal(userSession);
}
}
private UserSession GetUserSession()
{
if (_serviceAuthToken != null)
{
string sessionID = _serviceAuthToken.GetSessionID();
if (!sessionID.IsNullOrBlank())
{
return _userSessionDataLayer.GetForSessionID(sessionID);
}
}
return null;
}
}
I have a singleton class setting up the Ninject kernel:
public class MyKernel
{
public static StandardKernel Kernel { get; set; }
static MyKernel()
{
Kernel = new StandardKernel();
Kernel.Bind<IServiceAuthToken>().To<ServiceAuthToken>();
Kernel.Bind<UserSessionDataLayer>().To<UserSessionDataLayer>();
}
}
In my WCF service I use the PostSharp attribute as below:
[AuthoriseAndAudit(UserRoleTypesEnum.Operator)]
public JSONResult<bool> IsAliveAuthorised()
{
return new JSONResult<bool>() { Success = true, Result = true };
}
And in my unit test I'm using RhinoMocks to try and mock the two DI properties in the attribute.
[TestMethod]
public void IsAliveAuthorisedIsAuthorisedTest()
{
var mockServiceAuthToken = MockRepository.GenerateStrictMock<ServiceAuthToken>();
mockServiceAuthToken.Stub(x => x.GetSessionID()).Return("x");
var mockUserSessionDataLayer = MockRepository.GenerateStrictMock<UserSessionDataLayer>();
mockUserSessionDataLayer.Stub(x => x.GetForSessionID(Arg<string>.Is.Anything)).Return(new UserSession());
MyKernel.Kernel.Bind<ServiceAuthToken>().ToConstant(mockServiceAuthToken);
MyKernel.Kernel.Bind<UserSessionDataLayer>().ToConstant(mockUserSessionDataLayer);
var service = new MyService();
Assert.IsTrue(service.IsAliveAuthorised().Result);
}
The issue I have is the mock objects in the unit test are never ending up being set as the properties on the attribute. What am I doing wrong or conversely is there a better way to do unit testing on a PostSharp attribute? Also bearing in mind I really want to minimise the use of the Ninject DI to the bare minimum.
Instead of using the [Inject] attribute on your properties, redefine them like this:
public IServiceAuthToken _serviceAuthToken { get { return _kernel.Get<IServiceAuthToken>(); } }
public UserSessionDataLayer _userSessionDataLayer { get { return _kernel.Get<UserSessionDataLayer>(); } }
Also, in your test method you need to re-bind (note also that you were using the concrete type ServiceAuthToken in the first bind instead of the interface IServiceAuthToken):
MyKernel.Kernel.Rebind<IServiceAuthToken>().ToConstant(mockServiceAuthToken);
MyKernel.Kernel.Rebind<UserSessionDataLayer>().ToConstant(mockUserSessionDataLayer);