Add test to confirm schema astNode property is populated

Author: trevor-scheer

packages/apollo-graphql/src/schema/__tests__/buildSchemaFromSDL.test.ts

@@ -351,6 +351,29 @@ type MutationRoot {
         `"Unknown directive \\"@something\\"."`
       );
     });
+
+    it(`should preserve directive usages from the schema definition node`, () => {
+      const schema = buildSchemaFromSDL(
+        gql`
+          directive @contact(
+            name: String!
+            url: String!
+            description: String
+          ) on SCHEMA
+
+          schema
+            @contact(
+              name: "Contact"
+              url: "http://example.com/contact"
+              description: "Testing"
+            ) {
+            query: Query
+          }
+        `
+      );
+      expect(schema.astNode?.directives).toHaveLength(1);
+      expect(schema.astNode?.directives![0].name.value).toEqual("contact");
+    });
   });
 
   describe(`resolvers`, () => {

packages/apollo-graphql/src/schema/buildSchemaFromSDL.ts

@@ -132,7 +132,7 @@ export function buildSchemaFromSDL(
       directiveDefinitions.push(definition);
     } else if (definition.kind === Kind.SCHEMA_DEFINITION) {
       schemaDefinitions.push(definition);
-      schemaDirectives.push(...(definition.directives ?? []))
+      schemaDirectives.push(...(definition.directives ?? []));
     } else if (definition.kind === Kind.SCHEMA_EXTENSION) {
       schemaExtensions.push(definition);
     }