Detect non-virtual When...Do calls

[tpodolak]

Analyzers should be able to detect following wrong usages

using NSubstitute;

namespace MyNamespace
{
    public class Foo
    {
        public int Bar()
        {
            return 2;
        }
    }

    public class FooTests
    {
        public void Test()
        {
            int i = 0;
            var substitute = NSubstitute.Substitute.For<Foo>();

            void SubstituteCall(Foo sub)
            {
                sub.Bar();
            }

            substitute.When(SubstituteCall).Do(callInfo => i++);
            substitute.When(delegate(Foo sub) { sub.Bar() })
            substitute.When(sub => sub.Bar())
        }
    }
}

and of course usages of beforementioned examples executed as ordinal method and used with WhenForAnyArgs