Added more test cases

rfcs/test-cases/default-value-not-accessible/invalid/composite/users.graphql

@@ -0,0 +1,13 @@
+type Query {
+  users: [User!]!
+}
+
+type User @key(fields: "id") {
+  id: ID
+  friends(type: FriendType = FAMILY): [User!]!
+}
+
+enum FriendType {
+  FAMILY @internal
+  FRIEND
+}

rfcs/test-cases/default-value-not-accessible/valid/composite/users.graphql

@@ -0,0 +1,13 @@
+type Query {
+  users: [User!]!
+}
+
+type User @key(fields: "id") {
+  id: ID
+  friends(type: FriendType = FAMILY @internal): [User!]!
+}
+
+enum FriendType {
+  FAMILY @internal
+  FRIEND
+}

rfcs/test-cases/external-requires-extension/composite/reviews.graphql

@@ -0,0 +1,19 @@
+type Query {
+  reviews: [Review]
+}
+
+type Review @key(fields: "id") {
+  id: ID!
+  title: String!
+  author: User!
+}
+
+extend type User @key(fields: "id") {
+  id: ID! @external
+  profile: Profile! @external
+  reviews: [Review] @requires(fields: "profile { id __typename }")
+}
+
+extend type Profile {
+  id: ID! @external
+}

rfcs/test-cases/external-requires-extension/federation/users.graphql

@@ -0,0 +1,15 @@
+extend schema @link(url: "https://specs.apollo.dev/federation/v2.3", import: ["@key"])
+
+type Query {
+  users: [User]
+}
+
+type User @key(fields: "id") {
+  id: ID!
+  profile: Profile!
+}
+
+type Profile {
+  id: ID!
+  name: String!
+}