Re: [nsubstitute] Help me to solve this exception: "Expected to receive exactly 1 call matching: MyMethod Actually received no matching calls."

[David Tchepak]

The problem is in this bit of the test:

            //When

            MyEntities actual = concreteDal.GetMyEntities(Arg.Any<string>());

The argument matchers like `Arg.Any<string>()` can only be used with substitutes. In the above call it is used with a call to a concrete class. You can fix this by passing through a real argument to the concrete call:

            MyEntities actual = concreteDal.GetMyEntities("test");

I'll have a look to see if there's anything we can do to throw a more helpful error in these cases, because the current one is quite misleading.

Cheers,

David

On Sat, Jun 16, 2012 at 1:29 AM, Aurelien <theba...@gmail.com> wrote:

Hello,

I'm using NSubstitute 1.4.0.0. I try to test my method: GetMyEntities(string myId). But, I have this exception: "Expected to receive exactly 1 call matching: LoadData(any GetCommand) Actually received no matching calls.", when my ReceivedWithAnyArgs assertion for LoadData method is called. Have you got an idea to solve it ? Please help me.

• My Code:

public class DataAccessLayer : IDataAccessLayer, IDisposable
{
 private IBusinessEntities dataFacade;       

 public DataAccessLayer(IBusinessEntities facade)
 {
  dataFacade = facade;
 }

 public MyEntities GetMyEntities(string myId)
 {
  GetAllMyEntities getMyEntities = new GetAllMyEntities();
  getMyEntities.Id = myId;
  dataFacade.LoadData(getMyEntities);
  return dataFacade.Get<MyEntities>();
 }
}

 

public interface IBusinessEntities

{

 T Get<T>() where T : BusinessEntitiesBase, new();

 void LoadData(GetCommand commandName);

}

 

• My Test:

public void GetMyEntitiesOK_UndefinedParam_MyEntitiesIsSame()
{
 //Given
 var mockFacade = Substitute.For<IBusinessEntities>();
 var concreteDal = new DataAccessLayer(mockFacade);
 MyEntities expected = new MyEntities();

 //Expect
 mockFacade.Get<MyEntities>().ReturnsForAnyArgs(expected);

 //When
 MyEntities actual = concreteDal.GetMyEntities(Arg.Any<string>());

 //Then
 Assert.AreSame(expected, actual);
 mockFacade.ReceivedWithAnyArgs(1).LoadData(Arg.Any<GetCommand>()); //exception????
 mockFacade.ReceivedWithAnyArgs(1).Get<MyEntities>();
}

 

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[Aurelien]

PERFECT !!! Thanks you so much. NSubstitute is really an excellent mocking framework.

 

Cheers,

Aurélien

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