Check number of calls

[Libor Blaheta]

Hello,

could you help me with the following newbie problem. My code under test may or may not call a specific function one or more times with different parameters.

I need to check that the function was called only once with specific paramaeter set and I need to fail the test if the function was called with different params or if it was called more than once. I used Recieved and Recieved(1) to check the function was called but a second call to the function did not trigger exception so the test passed. See the code below please

using System;

using NSubstitute;

namespace ConsoleApplication1

{

    public interface ICallbacks

    {

        void GetData(int a, int b);

    }

    public class TestClass

    {

        public static void DoSomething(ICallbacks callbacks)

        {

            callbacks.GetData(1, 2);

            callbacks.GetData(1, 3);

        }

    }

    class Program

    {

        static void Main(string[] args)

        {

            var c = Substitute.For<ICallbacks>();

            TestClass.DoSomething(c);

            c.Received().GetData(1, 2);

            // TODO GetData called twice how do I check for the second call? if GetData is called more than once make if fail....how?

            Console.Read();

        }

    }

}

Should I use RecievedCalls and check number of calls and if it is different than one then throw an exception or is there more obvious way of doing the check I have missed?

Thanks,

Libor

[David Tchepak]

Hi Libor,

NSubstitute isn't really designed for strict mocks like this, but I think we can achieve what you're after with two separate assertions: one on the call with the arguments you want, and the other on the total number of calls with any arguments.

    c.Received().GetData(1,2);

    c.ReceivedWithAnyArgs(1).GetData(0,0); // will throw if more than 1 call is received.

There are a few other ways of hacking in this behaviour, but I think this one will suit this case best.

Regards,

David

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[Libor Blaheta]

Yes, I used to use RhinoMocks and Strict mocks and lately I have moved to NSubstitute so the second call which did fail the test took me by surprise.

I will do it like you suggested, any chance of having some kind of "strict" call checking feature implemented right in NSubstitute?

Dne sobota 22. října 2016 13:43:10 UTC+2 David Tchepak napsal(a):

To unsubscribe from this group and stop receiving emails from it, send an email to nsubstitute...@googlegroups.com.

[Libor Blaheta]

ok, no need to answer :) found discussions about NSubstiture + strick mocks on google and here in the group

Dne sobota 22. října 2016 15:34:00 UTC+2 Libor Blaheta napsal(a):

[raavi.moh...@gmail.com]

If my memory servers me right, the NSubtitute documentation do provide a way to check number of times the calls were made.

[Libor Blaheta]

that seems to be one of the ways how to do what I need

Dne pondělí 24. října 2016 10:31:11 UTC+2 raavi.moh...@gmail.com napsal(a):