Add support for returning non random abstract types

[milansmolik-dragon]

I have had a very specific problem: I have an app, which uses interface Card extended by both Debit Card and CreditCard. They are used by DebitAccount and CreditAccount respectively. However when I receive faked CreditCard type for DebitAccount, the app is not built to handle that.

It would be best for me if I could return DebitCard for DebitAccount only, and not to be limited by a random selection from all Card types.

Would there be interest in such functionality? I have already implemented it in my fork, so I can open a PR for it whenever.

[IvanGoncharov]

@milansmolik-dragon I added support for __typename in @examples values 72f59ca
and released it as 2.0.0-rc.2 on NPM.
It allows you to do the following:

type Query {
  card: Card @examples(values:[{ __typename: DebitCard }])
}

interface Card {
  id: ID!
}

type DebitCard implements Card {
  id: ID!
}

type CreditCard implements Card {
  id: ID!
  creditLimit: Float
}

Can you please test it?
Does it solve your issue?

[milansmolik-dragon]

Oh yeah, I used an older build for that. This one works great, thanks!