When enum is used as argument, its default value is not validated against enum definition

[rafalp]

Hello!

While working on enum support in Ariadne I've found that enums values aren't validated against GraphQL enum when they are defined as fields on GraphQL schema.

Following schema passes validation:

enum Role {
  ADMIN
  USER
}

type Query {
  hello(r: Role = ADMIN): String
  complex(i: Test = { role: INVALID }): String
  complexAlt(i: Test): String
}

input Test {
  ignore: String
  role: Role = INVALID
}

I would've expected schema validators to raise INVALID, but instead those fields are quietly excluded from default value passed to field's resolver.

[Cito]

Thanks for reporting. GraphQL.js behaves the same, so I passed this question on.