fix: detect incorrect subtypes of interface fields across subgraphs (#64

)

- [x] cover a case when interface field expects an interface (or union)
and the field of an object type implementing the interface resolves a
member.

.changeset/witty-ghosts-applaud.md

@@ -0,0 +1,5 @@
+---
+'@theguild/federation-composition': patch
+---
+
+fix: detect incorrect subtypes of interface fields across subgraphs

.gitignore

@@ -3,4 +3,4 @@ node_modules
 .DS_Store
 dist
 *.cpuprofile
-.bob
+.bob

CHANGELOG.md

@@ -4,29 +4,43 @@
 
 ### Patch Changes
 
-- [#62](https://github.com/the-guild-org/federation/pull/62) [`e50bc90`](https://github.com/the-guild-org/federation/commit/e50bc90d4dc65769dbe44fa01994148d968755dc) Thanks [@kamilkisiela](https://github.com/kamilkisiela)! - Fix: do not expose `federation__Scope` and `federation__Policy` scalar definitions to a supergraph
+- [#62](https://github.com/the-guild-org/federation/pull/62)
+  [`e50bc90`](https://github.com/the-guild-org/federation/commit/e50bc90d4dc65769dbe44fa01994148d968755dc)
+  Thanks [@kamilkisiela](https://github.com/kamilkisiela)! - Fix: do not expose `federation__Scope`
+  and `federation__Policy` scalar definitions to a supergraph
 
 ## 0.11.2
 
 ### Patch Changes
 
-- [#60](https://github.com/the-guild-org/federation/pull/60) [`2f7fef1`](https://github.com/the-guild-org/federation/commit/2f7fef10409a25f8366182448a48e72d5451abf9) Thanks [@kamilkisiela](https://github.com/kamilkisiela)! - Normalize enum values to be printed as enum values in Supergraph SDL, even if the user's subgraph schema has them as strings
+- [#60](https://github.com/the-guild-org/federation/pull/60)
+  [`2f7fef1`](https://github.com/the-guild-org/federation/commit/2f7fef10409a25f8366182448a48e72d5451abf9)
+  Thanks [@kamilkisiela](https://github.com/kamilkisiela)! - Normalize enum values to be printed as
+  enum values in Supergraph SDL, even if the user's subgraph schema has them as strings
 
 ## 0.11.1
 
 ### Patch Changes
 
-- [#58](https://github.com/the-guild-org/federation/pull/58) [`ab707b9`](https://github.com/the-guild-org/federation/commit/ab707b9517c141377ab10d46ec6ce2efa1401450) Thanks [@kamilkisiela](https://github.com/kamilkisiela)! - Support directives on Input Object types
+- [#58](https://github.com/the-guild-org/federation/pull/58)
+  [`ab707b9`](https://github.com/the-guild-org/federation/commit/ab707b9517c141377ab10d46ec6ce2efa1401450)
+  Thanks [@kamilkisiela](https://github.com/kamilkisiela)! - Support directives on Input Object
+  types
 
 ## 0.11.0
 
 ### Minor Changes
 
-- [#52](https://github.com/the-guild-org/federation/pull/52) [`589effd`](https://github.com/the-guild-org/federation/commit/589effd5b82286704db2a4678bf47ffe33e01c0d) Thanks [@kamilkisiela](https://github.com/kamilkisiela)! - Support @interfaceObject directive
+- [#52](https://github.com/the-guild-org/federation/pull/52)
+  [`589effd`](https://github.com/the-guild-org/federation/commit/589effd5b82286704db2a4678bf47ffe33e01c0d)
+  Thanks [@kamilkisiela](https://github.com/kamilkisiela)! - Support @interfaceObject directive
 
 ### Patch Changes
 
-- [#52](https://github.com/the-guild-org/federation/pull/52) [`589effd`](https://github.com/the-guild-org/federation/commit/589effd5b82286704db2a4678bf47ffe33e01c0d) Thanks [@kamilkisiela](https://github.com/kamilkisiela)! - Improve INTERFACE_KEY_MISSING_IMPLEMENTATION_TYPE
+- [#52](https://github.com/the-guild-org/federation/pull/52)
+  [`589effd`](https://github.com/the-guild-org/federation/commit/589effd5b82286704db2a4678bf47ffe33e01c0d)
+  Thanks [@kamilkisiela](https://github.com/kamilkisiela)! - Improve
+  INTERFACE_KEY_MISSING_IMPLEMENTATION_TYPE
 
 ## 0.10.1
 

__tests__/ast.spec.ts

@@ -1,5 +1,6 @@
-import { ConstDirectiveNode, Kind, TypeKind, parse } from 'graphql';
+import { ConstDirectiveNode, Kind, parse, TypeKind } from 'graphql';
 import { describe, expect, test } from 'vitest';
+import { ArgumentKind } from '../src/subgraph/state.js';
 import {
   createEnumTypeNode,
   createInputObjectTypeNode,
@@ -11,7 +12,6 @@ import {
   createUnionTypeNode,
   stripFederation,
 } from '../src/supergraph/composition/ast.js';
-import { ArgumentKind } from '../src/subgraph/state.js';
 
 function createDirective(name: string): ConstDirectiveNode {
   return {
@@ -893,7 +893,7 @@ describe('input object type', () => {
       }),
     ).toEqualGraphQL(/* GraphQL */ `
       input Filter {
-        obj: Obj = {limit: 1}
+        obj: Obj = { limit: 1 }
         limit: Int = 2
       }
     `);

__tests__/composition.spec.ts

@@ -46,7 +46,6 @@ testImplementations(api => {
 
     assertCompositionSuccess(result);
 
-
     expect(result.supergraphSdl).toContainGraphQL(/* GraphQL */ `
       type Query @join__type(graph: A) {
         users(type: UserType! = Regular): [User!]!
@@ -1245,7 +1244,7 @@ testImplementations(api => {
           @join__unionMember(graph: A, member: "Book")
           @join__unionMember(graph: B, member: "Movie")
           @join__unionMember(graph: B, member: "Book") =
-            Movie
+          | Movie
           | Book
       `);
     });
@@ -1303,7 +1302,7 @@ testImplementations(api => {
           @join__type(graph: B)
           @join__unionMember(graph: A, member: "Book")
           @join__unionMember(graph: B, member: "Movie") =
-            Book
+          | Book
           | Movie
       `);
     });
@@ -5426,7 +5425,7 @@ testImplementations(api => {
             @join__unionMember(graph: A, member: "Movie")
             @join__unionMember(graph: B, member: "Book")
             @join__unionMember(graph: C, member: "Song") =
-              Movie
+            | Movie
             | Book
             | Song
         `);

__tests__/fixtures/dgs/aside397.graphql

@@ -1,22 +1,46 @@
-schema @link(url: "https://specs.apollo.dev/link/v1.0") @link(url: "https://specs.apollo.dev/federation/v2.0", import: ["@key", "@external", "@provides", "@requires", "@extends", "@shareable", "@tag", "@inaccessible"]) {
+schema
+  @link(url: "https://specs.apollo.dev/link/v1.0")
+  @link(
+    url: "https://specs.apollo.dev/federation/v2.0"
+    import: [
+      "@key"
+      "@external"
+      "@provides"
+      "@requires"
+      "@extends"
+      "@shareable"
+      "@tag"
+      "@inaccessible"
+    ]
+  ) {
   query: Query
 }
 
 directive @extends on INTERFACE | OBJECT
 
 directive @external(reason: String) on FIELD_DEFINITION | OBJECT
 
-directive @key(fields: federation__FieldSet!, resolvable: Boolean = true) repeatable on INTERFACE | OBJECT
+directive @key(
+  fields: federation__FieldSet!
+  resolvable: Boolean = true
+) repeatable on INTERFACE | OBJECT
 
-directive @link(as: String, for: link__Purpose, import: [link__Import], url: String) repeatable on SCHEMA
+directive @link(
+  as: String
+  for: link__Purpose
+  import: [link__Import]
+  url: String
+) repeatable on SCHEMA
 
 directive @provides(fields: federation__FieldSet!) on FIELD_DEFINITION
 
 directive @requires(fields: federation__FieldSet!) on FIELD_DEFINITION
 
 directive @shareable on FIELD_DEFINITION | OBJECT
 
-directive @tag(name: String!) repeatable on ARGUMENT_DEFINITION | ENUM | ENUM_VALUE | FIELD_DEFINITION | INPUT_FIELD_DEFINITION | INPUT_OBJECT | INTERFACE | OBJECT | SCALAR | UNION
+directive @tag(
+  name: String!
+) repeatable on ARGUMENT_DEFINITION | ENUM | ENUM_VALUE | FIELD_DEFINITION | INPUT_FIELD_DEFINITION | INPUT_OBJECT | INTERFACE | OBJECT | SCALAR | UNION
 
 enum whosec2c {
   first056
@@ -56,4 +80,4 @@ scalar link__Import
 enum link__Purpose {
   EXECUTION
   SECURITY
-}
+}