using System.Reflection;
 
[AttributeUsage(AttributeTargets.Method)]
public class ExpertTestAttribute : Attribute { }
 
public class TestRunner
{
    public void RunTests(object testInstance)
    {
        var methods = testInstance.GetType()
            .GetMethods(BindingFlags.Public | BindingFlags.Instance)
            .Where(m => m.GetCustomAttribute<ExpertTestAttribute>() != null);
 
        foreach (var method in methods)
        {
            try
            {
                method.Invoke(testInstance, null);
                Console.WriteLine($"Passed: {method.Name}");
            }
            catch (TargetInvocationException ex)
            {
                Console.WriteLine($"Failed: {method.Name} - {ex.InnerException?.Message}");
            }
        }
    }
}