How to NUnit test for a method's attribute existence

Question

   public interface IMyServer
    {
        [OperationContract]
        [DynamicResponseType]
        [WebGet(UriTemplate = "info")]
        string ServerInfo();
    }

How do I write an NUnit test to prove that the C# interface method has the [DynamicResponseType] attribute set on it?

Answer 1

Something like:

Assert.IsTrue(Attribute.IsDefined(
            typeof(IMyServer).GetMethod("ServerInfo"),
            typeof(DynamicResponseTypeAttribute)));

You could also do something involving generics and delegates or expressions (instead of the string "ServerInfo"), but I'm not sure it is worth it.

For [WebGet]:

WebGetAttribute attrib = (WebGetAttribute)Attribute.GetCustomAttribute(
    typeof(IMyServer).GetMethod("ServerInfo"),
    typeof(WebGetAttribute));
Assert.IsNotNull(attrib);
Assert.AreEqual("info", attrib.UriTemplate);