Moq and parameter attribute inheritance

Question

When I try to mock a class using Moq the method attribute gets inherited to the mock class, but not the parameter attribute.

Basically the row "let a = (ArgumentsAttribute) p.GetCustomAttributes(typeof (ArgumentsAttribute), true).SingleOrDefault()" doesnt return the attribute.. Run the code to see where it fails.

How do I make this test pass?

[TestFixture]
public class MyTests {
    [Test]
    public void shouldFindAndCallMethodWithAttributes() {
        var myInterface = new Mock<MyClass>();
        myInterface.Setup(x => x.MyMarkedMethod(1));
        myInterface.Setup(x => x.MyMarkedMethod(5));
        myInterface.Setup(x => x.MyMarkedMethod(9));

        var executor = new MarkedMethodExecutor();
        executor.FindAndCallMethodWithAttributes(myInterface.Object);

        myInterface.VerifyAll();
    }
}

public class MarkedMethodExecutor {
    public void FindAndCallMethodWithAttributes(object anObject) {
        var methods = from m in anObject.GetType().GetMethods()
                      where m.GetCustomAttributes(typeof (ExecuteMeAttribute), true).SingleOrDefault() != null
                      select m;
        foreach (var method in methods) {
            var callInfos = from p in method.GetParameters()
                            let a = (ArgumentsAttribute) p.GetCustomAttributes(typeof (ArgumentsAttribute), true).SingleOrDefault()
                            where a != null
                            select new {Parameter = p, Attribute = a};
            // assume its one argument here for simplicity..
            var attribute = callInfos.Single().Attribute;
            foreach (var argument in attribute.Arguments) {
                method.Invoke(anObject, new[] {argument});
            }
        }
    }
}

public class MyClass {
    [ExecuteMe]
    public virtual void MyMarkedMethod([Arguments(1, 5, 9)] int arg) {}
}

[AttributeUsage(AttributeTargets.Method, AllowMultiple = false, Inherited = true)]
public class ExecuteMeAttribute : Attribute {}

[AttributeUsage(AttributeTargets.Parameter, AllowMultiple = false, Inherited = true)]
public class ArgumentsAttribute : Attribute {
    public readonly object[] Arguments;

    public ArgumentsAttribute(params object[] arguments) {
        Arguments = arguments;
    }
}

Answer 1

I do not understand your problem: do you want to set the attributes?

You could use the function It.is(match). Maybe it helps: http://api.moq.me/html/5976987C.htm