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.