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Mocking SharePoint

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Johan Kartiwa asked on 15 Apr 2010, 08:45 AM

Hello.

I'm currently trying out JustMock to make a SharePoint Unit test.

However I have difficulties mocking SPSite and SPWeb objects.

Any advice?

The method that I'm trying to mock is roughly as follows:

                    SPSite site = SPContext.Current.Site;         
            SPSecurity.RunWithElevatedPrivileges(delegate() {         
                using (SPSite mysite = new SPSite(site.ID)) {         
                    using (SPWeb myweb = mysite.OpenWeb()) {         
                        SPList = myweb.Lists["List_Name"];         
                        // do something else         
                    }         
                }         
            });         

3 Answers, 1 is accepted

answered on 16 Apr 2010, 09:50 PM

I too am looking into the ability to fake various SharePoint objects.

I have been playing with Typemock, and with that framework I would do something like

                    // we fake SPContext and all of its classes         
            Isolate.Fake.StaticMethods<SPContext>(Members.ReturnRecursiveFakes);         
                     
            // create a fake SPSite, and make sure all of it's properties also have fake objects         
            var fakeSite = Isolate.Fake.Instance<SPSite>(Members.ReturnRecursiveFakes);         
                     
            // the next time a new instance of SPSite is created, use our fake one instead         
            Isolate.Swap.NextInstance<SPSite>().With(fakeSite);         

The ReturnRecursiveFakes is a super handy feature, and I'd love to see something similar in JustMock - hint hint Telerik :)

When I tried to do something similar in JustMock, I first enabled JustMock through the menu in Visual Studio since we will be creating mocks on static properties and sealed classes. I then tried the following code in my unit test

                    // first we create a fake          
            var fakeContext = Mock.Create<SPContext>();         
                     
            // make sure our fake SPContext is used         
            Mock.Arrange(() => SPContext.Current).Returns(fakeContext);         
                     
            Assert.IsNotNull(SPContext.Current, "The current SPContext shouldn't be null");        

This works, but all of the SPContext properties are null since we don't have the ability to recursively fake its objects. So I then tried to manually setup the other SP objects we need and ran into a couple of problems. I first tried to create a fake SPSite as follows:

                    var fakeSite = Mock.Create<SPSite>();         

and I received the following error and stack trace:

                    Test method UnitTests.CreateSeriousIncidentReportWebPartJustMockTests.MyTest threw exception:  System.Reflection.AmbiguousMatchException: Ambiguous match found..         
                     
            System.DefaultBinder.BindToMethod(BindingFlags bindingAttr, MethodBase[] canidates, Object[]& args, ParameterModifier[] modifiers, CultureInfo cultureInfo, String[] names, Object& state)         
            System.RuntimeType.CreateInstanceImpl(BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes)         
            System.Activator.CreateInstance(Type type, BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes)         
            System.Activator.CreateInstance(Type type, Object[] args)         
            Telerik.DynamicProxy.Proxy.Create(Type target, Boolean includeObjectOverrides, Object[] args) in c:\B\Basilisk\Basilisk CI Build\Sources\CodeBase\Telerik.JustMock\DynamicProxy\Proxy.cs: line 60         
            Telerik.DynamicProxy.ProxyFactory.Create() in c:\B\Basilisk\Basilisk CI Build\Sources\CodeBase\Telerik.JustMock\DynamicProxy\ProxyFactory.cs: line 83         
            Telerik.DynamicProxy.Fluent.FluentProxy.NewInstance() in c:\B\Basilisk\Basilisk CI Build\Sources\CodeBase\Telerik.JustMock\DynamicProxy\Fluent\FluentProxy.cs: line 64         
            Telerik.DynamicProxy.Proxy.Create(Type target, Action`1 action) in c:\B\Basilisk\Basilisk CI Build\Sources\CodeBase\Telerik.JustMock\DynamicProxy\Proxy.cs: line 85         
            ctor(Type target, BehaviorMode mode, Object[] args) in c:\B\Basilisk\Basilisk CI Build\Sources\CodeBase\Telerik.JustMock\MockObject.cs: line 41         
            Telerik.JustMock.Mock.Create(Type target, BehaviorMode mode, Object[] args) in c:\B\Basilisk\Basilisk CI Build\Sources\CodeBase\Telerik.JustMock\Mock.cs: line 290         
            Telerik.JustMock.Mock.Create(Type target, Object[] args) in c:\B\Basilisk\Basilisk CI Build\Sources\CodeBase\Telerik.JustMock\Mock.cs: line 275         
            Telerik.JustMock.Mock.Create[T]() in c:\B\Basilisk\Basilisk CI Build\Sources\CodeBase\Telerik.JustMock\Mock.cs: line 264         
            UnitTests.CreateSeriousIncidentReportWebPartJustMockTests.MyTest() in C:\workspaces\SD36.CriticalIncidents\Main\Source\UnitTests\CreateSeriousIncidentReportWebPartJustMockTests.cs: line 70         
                     

I am guessing this is because SPSite doesn't have a default constructor ... although I would like to be able to create a fake SPSite without passing it any information. So I then tried the following code:

                    Guid siteId = Guid.NewGuid();         
            var fakeSite = Mock.Create<SPSite>(siteId);         

and received the following error:

                    Initialization method UnitTests.CreateSeriousIncidentReportWebPartJustMockTests.MyTestInitialize threw exception. System.IO.FileNotFoundException:  System.IO.FileNotFoundException: Could not load file or assembly 'Telerik.CodeWeaver.Hook.Delegate_2c4a8880f1314fbf925ee4c0c6e1fc34, Version=1.0.0.0, Culture=neutral, PublicKeyToken=db35614751eb4716' or one of its dependencies. The system cannot find the file specified. --->  System.IO.FileNotFoundException: Could not load file or assembly 'Telerik.CodeWeaver.Hook.Delegate_2c4a8880f1314fbf925ee4c0c6e1fc34, Version=1.0.0.0, Culture=neutral, PublicKeyToken=db35614751eb4716' or one of its dependencies. The system cannot find the file specified.WRN: Assembly binding logging is turned OFF.         
            To enable assembly bind failure logging, set the registry value [HKLM\Software\Microsoft\Fusion!EnableLog] (DWORD) to 1.         
            Note: There is some performance penalty associated with assembly bind failure logging.         
            To turn this feature off, remove the registry value [HKLM\Software\Microsoft\Fusion!EnableLog].         
            .         

My test project is referencing the following assemblies:

- Telerik.JustMock.dll

- Telerik.JustMock.AddIn.dll

- Telerik.CodeWeaver.Hook.dll

Is this a bug in JustMock, or am I missing something?

Cheers.

Mike