Below, I have code for an object that I would like to test. It is in an assembly called Business and I have added the attributes in the AssemblyInfo.cs to make internals visible to the test and rhino mocks which are located in another assembly. When testing the GenerateReport method, I can not fake out the call to ValidateWorkingDirectory when it is "internal" (System.ApplicationException : Must set Working Directory before any method calls.). If I make ValidateWorkingDirectory public, the problem goes away. I thought InternalsVisibleTo would address this issue.
public class MyClass : IMyClass
{
private readonly IMyClassDataProvider _myClassDataProvider;
public virtual string WorkingDirectory { get; set; }
public MyClass(IMyClassDataProvider myClassDataProvider)
{
_myClassDataProvider = myClassDataProvider;
}
internal virtual void ValidateWorkingDirectory()
{
if (string.IsNullOrEmpty(WorkingDirectory))
{
throw new ApplicationException("Must set Working Directory before any method calls.");
}
}
public virtual void GenerateReport(vars)
{
ValidateWorkingDirectory();
InsertData(_myClassDataProvider.GetData(vars), "ReportName");
}
internal virtual void InsertData(DataSet analysis, string fileName)
{
DoSomeStuff();
}
private static void DoSomeStuff()
{
//Whatevs
}
}
//In AssmeblyInfo.cs
[assembly: InternalsVisibleTo("UnitTests.Business")]
[assembly: InternalsVisibleTo("Rhino.Mocks")]
[TestFixture]
public class MyClassTests : TestFixtureBase
{
private MockRepository _mocks;
private IMyClassDataProvider _myClassDataProvider;
private MyClass _myClass;
private var _vars;
[SetUp]
protected void Init()
{
_mocks = new MockRepository();
_myClassDataProvider = _mocks.StrictMock<IMyClassDataProvider >();
_myClass = _mocks.PartialMock<MyClass>(_myClassDataProvider);
_vars = "who cares";
}
[Test]
[ExpectedException(typeof(ApplicationException), ExpectedMessage = "Must set Working Directory before any method calls.")]
public virtual void ShouldThrowAnExceptionIfWorkingDirectoryNotSet()
{
Expect.Call(_myClass.WorkingDirectory).Return(Random.Get<bool>() ? null : string.Empty);
_mocks.ReplayAll();
_myClass.ValidateWorkingDirectory();
_mocks.VerifyAll();
}
[Test]
public virtual void ShouldGenerateReport()
{
DataSet dataSetToReturn = new DataSet();
using (_mocks.Ordered())
{
Expect.Call(() => _myClass.ValidateWorkingDirectory());
Expect.Call(_myClassDataProvider.GetData(vars)).Return(dataSetToReturn);
_myClass.InsertData(dataSetToReturn, "ReportName");
}
_mocks.ReplayAll();
_myClass.GenerateReport(vars);
_mocks.VerifyAll();
}
}
You need to expose your internal members to proxy assembly, not Rhino's assembly itself:
This happens to be common misunderstanding, for detailed information on how to use internals visible with Rhino, check this documentation page.