Mocking an interface is easier. You can mock the virtual members of a non-sealed class. If a class is sealed or the members you want to mock are not virtual, you'll have to create a wrapper (possibly in the form of an interface) in order to do your mocking.
--- Patrick Steele http://weblogs.asp.net/psteele On Thu, Nov 10, 2011 at 3:07 PM, Laksh <[email protected]> wrote: > Thanks. > I'm new rhino mocks and never used it before..so the questions. > One last question. Is it necessary to derive all the classes from some > kind of interface? How do we mock .Net classes? > for example > MockRepository mocks = new MockRepository(); > var myClass = mocks.Stub<MyClass>(); > var list = mocks.DynamicMock<Array>(); > > On Nov 10, 11:51 am, Patrick Steele <[email protected]> wrote: >> Correct. Mocking only works if you control creation of the object. >> >> --- >> Patrick Steelehttp://weblogs.asp.net/psteele >> >> On Thu, Nov 10, 2011 at 12:41 PM, Gavin van der Merwe >> >> >> >> >> >> >> >> <[email protected]> wrote: >> > I think Patrick is saying that mocking MyClass this way is not possible. >> > You need to structure your class in a de-coupled way ... >> > public class ClassThatDoesWork >> > { >> > private MyClass instance; >> > public ClassThatDoesWork(MyClass instance) >> > { >> > this.instance = instance; >> > } >> > public void DoWork(someInputParameters) >> > { >> > // do stuff with mocked instance >> > } >> > } >> >> > On 10 November 2011 17:31, Laksh <[email protected]> wrote: >> >> >> Thanks, i'll would do that, and we are using Repository pattern, so >> >> its easy change. >> >> >> i have a question though. In my scenario the method returns the >> >> Package class so the caller of this method knows Package class.so i'm >> >> able to Assert the values. >> >> If i have a method which internally creates instance of class, would >> >> it be possible to mock that class. see the example below >> >> >> public void DoWork(someInputParameters) >> >> { >> >> MyClass instance = new MyClass() >> >> // do some logic here. >> >> // I may use some .Net classes also to perform the logic >> >> } >> >> >> is it possible to mock MyClass & .Net classes here ? >> >> >> On Nov 10, 10:18 am, Patrick Steele <[email protected]> wrote: >> >> > You want to make sure you have a loosely coupled architecture so you >> >> > can do your unit tests in isolation. >> >> >> > The Manifest class you originally showed looks like it needs to get >> >> > data from a database (The GetData method). That dependency on a >> >> > database should be in a different component. One idea is to create a >> >> > repository interface for accessing the data: >> >> >> > interface IDataObjectRepository >> >> > { >> >> > DataObject GetData(IContext); >> >> >> > } >> >> >> > Your Manifest class now has a dependency on the IDataObjectRepository >> >> > which can be mocked at test time using Rhino.Mocks. This way you >> >> > don't have to have an actual database up and running to execute your >> >> > unit test for BuildManifest(). You don't have to worry about proper >> >> > table structures and things like that. >> >> >> > So iyour Manifest class now takes in the repository: >> >> >> > public class Manifest : IManifest<Package> >> >> > { >> >> > private IContext _context = null; >> >> > private IDataObjectReposutory _repository = null; >> >> >> > public Manifest(IContext context, IDataObjectReposutory >> >> > repository) >> >> > { >> >> > _context = context; >> >> > _repository = repository; >> >> > } >> >> >> > public Package BuildManifest() >> >> > { >> >> > ... >> >> > DataObject data = _repository.GetData(_context); >> >> > ... >> >> > } >> >> >> > } >> >> >> > Now you can mock your context and repository and test to make sure >> >> > that your Package gets built properly based on the data returned by >> >> > IDataObjectRepository.GetData(): >> >> >> > // arrange >> >> > var context = MockRepository.GenerateStub<IContext>(); >> >> > var repository = MockRepository.GenerateStub<IDataObjectRespository>(); >> >> > var do = new new DataObject { BatchID = "100", Title="Test" }; >> >> > repository.Stub(r => r.GetData(context)).Returns(do); >> >> >> > // act >> >> > var manifest = new Manifest(context, repository); >> >> > var pacakgeManifest = manifest.BuildManifest(); >> >> >> > // assert >> >> > Assert.AreEqual(do.BatchID, packageManifest.BatchID); >> >> > Assert.AreEqual(do.Title, packageManifest.Title); >> >> > etc... >> >> >> > --- >> >> > Patrick Steelehttp://weblogs.asp.net/psteele >> >> >> > On Thu, Nov 10, 2011 at 10:39 AM, Laksh <[email protected]> wrote: >> >> > > GetData method gets the data from the database and then I assign the >> >> > > data to Package class hierarchy. >> >> > > I'm creating the instance of Package inside the method. So how Rhino >> >> > > will test such things. My question was not only for this method. In >> >> > > general it is very common we create instances of custom classes, .Net >> >> > > classes inside the method. (Basically local variables). In such case >> >> > > how do test the method using Rhino? >> >> >> > > On Nov 9, 10:33 am, Patrick Steele <[email protected]> wrote: >> >> > >> What does GetData do? You probably need to stub that out, but >> >> > >> without >> >> > >> knowing what it does, I can't say for sure. >> >> >> > >> --- >> >> > >> Patrick Steelehttp://weblogs.asp.net/psteele >> >> >> > >> On Wed, Nov 9, 2011 at 11:20 AM, Laksh <[email protected]> wrote: >> >> > >> > I have the following method. I'm creating a instance of Package >> >> > >> > class >> >> > >> > inside the method, setting some of its proeprties and then >> >> > >> > returning >> >> > >> > it. How do i unit test this method using Rhino? >> >> >> > >> > public class Manifest : IManifest<Package> >> >> > >> > { >> >> > >> > private IContext _context = null; >> >> >> > >> > publicManifest(IContext context) >> >> > >> > { >> >> >> > >> > _context = context; >> >> > >> > } >> >> >> > >> > public Package BuildManifest() >> >> > >> > { >> >> > >> > // Data object is class which holds the data from >> >> > >> > datasource. >> >> > >> > DataObject data = GetData(_context); >> >> >> > >> > Package package = new Package(); >> >> > >> > package.BatchID = data.BatchId; >> >> > >> > package.Title = data.Title; >> >> > >> > package.Name = data.Name; >> >> > >> > package.City = data.City; >> >> >> > >> > IList<PackageDocument> documents = new >> >> > >> > List<PackageDocument>(); >> >> > >> > foreach (Document document in data.ConvertedDocuments) >> >> > >> > { >> >> > >> > PackageDocument packageDocument = new >> >> > >> > PackageDocument(); >> >> > >> > packageDocument.FileName = document.DocumentName; >> >> > >> > packageDocument.PrintOrder = >> >> > >> > document.SequenceNumber.Value; >> >> > >> > packageDocument.PaperType = >> >> > >> > PackageDocumentPaperType.White; >> >> > >> > documents.Add(packageDocument); >> >> > >> > } >> >> > >> > package.Documents = documents.ToArray(); >> >> > >> > return package; >> >> > >> > } >> >> > >> > } >> >> >> > >> > -- >> >> > >> > You received this message because you are subscribed to the Google >> >> > >> > Groups "Rhino.Mocks" group. >> >> > >> > To post to this group, send email to [email protected]. >> >> > >> > To unsubscribe from this group, send email to >> >> > >> > [email protected]. >> >> > >> > For more options, visit this group >> >> > >> > athttp://groups.google.com/group/rhinomocks?hl=en. >> >> >> > > -- >> >> > > You received this message because you are subscribed to the Google >> >> > > Groups "Rhino.Mocks" group. >> >> > > To post to this group, send email to [email protected]. >> >> > > To unsubscribe from this group, send email to >> >> > > [email protected]. >> >> > > For more options, visit this group >> >> > > athttp://groups.google.com/group/rhinomocks?hl=en. >> >> >> -- >> >> You received this message because you are subscribed to the Google Groups >> >> "Rhino.Mocks" group. >> >> To post to this group, send email to [email protected]. >> >> To unsubscribe from this group, send email to >> >> [email protected]. >> >> For more options, visit this group at >> >>http://groups.google.com/group/rhinomocks?hl=en. >> >> > -- >> > You received this message because you are subscribed to the Google Groups >> > "Rhino.Mocks" group. >> > To post to this group, send email to [email protected]. >> > To unsubscribe from this group, send email to >> > [email protected]. >> > For more options, visit this group at >> >http://groups.google.com/group/rhinomocks?hl=en. > > -- > You received this message because you are subscribed to the Google Groups > "Rhino.Mocks" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]. > For more options, visit this group at > http://groups.google.com/group/rhinomocks?hl=en. > > -- You received this message because you are subscribed to the Google Groups "Rhino.Mocks" group. 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