interface Pet {
  name: String!
}

type Dog implements Pet {
  name: String!
  barkVolume: Int
}

type Cat implements Pet {
  name: String!
  meowVolume: Int
}

union CatOrDog = Cat | Dog

type Human {
  pets: [Pet!]
}

union DogOrHuman = Dog | Human

# https://spec.graphql.org/October2021/#sec-Object-Spreads-In-Object-Scope
fragment dogFragment on Dog {
  ... on Dog {
    barkVolume
  }
}

# https://spec.graphql.org/October2021/#sec-Abstract-Spreads-in-Object-Scope
fragment petNameFragment on Pet {
  name
}

fragment interfaceWithinObjectFragment on Dog {
  ...petNameFragment
}

fragment catOrDogNameFragment on CatOrDog {
  ... on Cat {
    meowVolume
  }
}

fragment unionWithObjectFragment on Dog {
  ...catOrDogNameFragment
}

# https://spec.graphql.org/October2021/#sec-Object-Spreads-In-Abstract-Scope
fragment petFragment on Pet {
  name
  ... on Dog {
    barkVolume
  }
}

fragment catOrDogFragment on CatOrDog {
  ... on Cat {
    meowVolume
  }
}

# https://spec.graphql.org/October2021/#sec-Abstract-Spreads-in-Abstract-Scope
fragment unionWithInterface on Pet {
  ...dogOrHumanFragment
}

fragment dogOrHumanFragment on DogOrHuman {
  ... on Dog {
    barkVolume
  }
}

# https://spec.graphql.org/October2021/#sec-Abstract-Spreads-in-Abstract-Scope.Interface-Spreads-in-implemented-Interface-Scope
interface Node {
  id: ID!
}

interface Resource implements Node {
  id: ID!
  url: String
}

# The validation for fragment spreads works on concrete types.
type ConcreteResource implements Resource & Node {
  id: ID!
  url: String
}

fragment interfaceWithInterface on Node {
  ...resourceFragment
}

fragment resourceFragment on Resource {
  url
}

# Make sure the above fragments are used
type Query {
  pet: Pet
  resource: Resource
}

query UseAllFragments {
  pet {
    ... dogFragment
    ... interfaceWithinObjectFragment
    ... unionWithObjectFragment
    ... petFragment
    ... catOrDogFragment
    ... unionWithInterface
  }
  resource {
    ...interfaceWithInterface
    ... @skip(if: true) {
      urlInInlineFragment: url
    }
  }
}