Mocking SharePoint

[Johan Kartiwa]

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
        }
    }
});

[Mike]

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

[Mike]

I forgot to mention that I am running Visual Studio 2008 SP1 on Windows 7 32-bit. Hopefully that will help diagnose the issue.

Cheers.

Mike

[Ricky]

Hi Mike,

Thanks for the detailed steps for reproducing the issue. I wil try it out and get back to you shortly.

Regards,
Mehfuz

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