Shimming object that doesn't have constructor

Question

I am using 3rd party library, and there is specificly a method that I want to shim.

public virtual QueueRuntimeInfo GetQueueRuntimeInfoAsync(string queuePath);

This method return QueueRuntimeInfo object. Here is the implementation of that class, which there is no constructor:

public class QueueRuntimeInfo
{
    internal QueueRuntimeInfo(string path)
    {
        this.Path = path;
    }
    public string Path { get; internal set; }
    public long MessageCount { get; internal set; }
}

Now, I want to shim GetQueueRuntimeInfoAsync method, which return QueueRuntimeInfo object, and then I want to set its property manually in my code.

Here is my shim method:

ShimManagementClient.AllInstances.GetQueueRuntimeInfoAsyncString = (managementClient, queuePath) =>
        {
            QueueRuntimeInfo queueRuntimeInfo; // what to do?!
            return queueRuntimeInfo;
        };

I think I can shim get methods of QueueRuntimeInfo class (PathGet and MessageCountGet). But still need to create the object somehow.

If there's no constructor defined in code, then the compiler generates a parameterless constructor. You can simply do `new QueueRuntimeInfo()` — canton7, Jan 20 '20 at 12:42
Intelisens gives error that `QueueRuntimeInfo` does not contain a constructor that take 0 argurments. Should I ignore this and compile? — Aryan Firouzian, Jan 20 '20 at 12:45
No, I don't think so. It is public class with few properties. it is not partial. — Aryan Firouzian, Jan 20 '20 at 12:49
Is it [this class](https://github.com/Azure/azure-sdk-for-net/blob/master/sdk/servicebus/Microsoft.Azure.ServiceBus/src/Management/QueueRuntimeInfo.cs)? — canton7, Jan 20 '20 at 12:50
Yes. It is. I removed some unnecessary stuff from it to post. — Aryan Firouzian, Jan 20 '20 at 12:51
Right. As you can clearly see, that's got an `internal` constructor. You are not going to be able to instantiate one of those yourself. — canton7, Jan 20 '20 at 12:52
So does it mean that I won't be able to shim that method in any way? — Aryan Firouzian, Jan 20 '20 at 12:56
If that relies on you instantiating your own `QueueRuntimeInfo`, correct — canton7, Jan 20 '20 at 12:56
Or this question: https://stackoverflow.com/questions/1199590/instancing-a-class-with-an-internal-constructor/1199655 — Patrick McDonald, Jan 20 '20 at 13:07
@PatrickMcDonald In my first try It seems that is working. thanks. — Aryan Firouzian, Jan 20 '20 at 13:09

Shimming object that doesn't have constructor

0 Answers0