Moq argument capture suggestion

[Ajai]

Hi All

Just playing with Moq, and needed to capture arguments passed to methods.

I saw discussions related to using It.IsAny and Callback to capture arguments. But felt this is was a bit cleaner...

var arg = new Arg<int>();

mock.Setup(m => m.Foo( arg.Capture() ));

Thanks

Ajai

public class Arg<T>

{

public T Value { get; set; }

public static implicit operator T(Arg<T> arg) { return arg.Value; }

public T Capture()

{

return Match<T>.Create((T value) => { Value = value; return true; });

return default(T);

}

}

[Vicenç Garcia]

Don't you could achieve the same behavior with It.Is ?

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Vicenç García
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[Ajai]

Yes, but it is more verbose, and not obvious what it is trying to do...

int arg = 0;

mock.Setup(m => m.Foo( It.Is<int>(i => { arg = i; return true; } ));

And sometimes verifying arguments is not a simple check like It.Is<int>(i => i == 10), we might need to capture more complex object.

A Dictionary<byte[], Dictionary<string, List<Mutation>>> in my case :)

Ajai

[Daniel Cazzulino]

Wow, that's nice!

Should we have it built in?

/kzu from mobile