UsersModuleConventionTests.cs

[TestFixture]
public class UsersModuleConventionTests
{
    [Test]
    public void AllPublicMethodsNeedToReturnOperationResult()
    {
        CodeWatcherConfig config = CodeWatcherConfig.Create()
            .WithWatcher(c => new MethodReturnTypeWatcher(c).Configure(typeof(OperationResult<object>)))
            .WatchAssembly(typeof(UsersModule).Assembly)
            .Build();

        //This will throw exception if any public method will return something else than OperationResult<object>
        config.Execute();
    }
}