Treat delegates as substitutes with NSubstitute

[gtbuchanan]

NSubstitute supports substituting delegates. However, delegates are not resolved as substitutes when using a fixture with the NSubstitute customization. Therefore, I can't run any NSubstitute assertions on them.

[Test]
public void ActionIsSubstitute()
{
    var fixture = new Fixture().Customize(new AutoNSubstituteCustomization());

    var action = fixture.Create<Action>();

    Assert.That(action.DidNotReceive, Throws.Nothing);
}

Fails with:

Expected: No Exception to be thrown
But was: <NSubstitute.Exceptions.NotASubstituteException: NSubstitute extension methods like .Received() can only be called on objects created using Substitute.For() and related methods.

Similar to #984.

[gtbuchanan]

I just realized the property GenerateDelegates already exists on AutoNSubstituteCustomization. Setting that to true resolved my issue. My apologies. I'm new to AutoFixture and couldn't find any documentation on this. Should have checked after I saw how it was resolved for the other issue.

[zvirja]

Yep, you're completely right in your finding 😊

One day we'll create a nice doc site and you'll be able to find this information there 😅

[Kralizek]

One day we'll create a nice doc site and you'll be able to find this information there 😅

Me at the standup meeting at work!