type/introspection: add missing __Directive.args(includeDeprecated:)

src/type/__tests__/introspection-test.ts

@@ -763,7 +763,17 @@ describe('Introspection', () => {
                 },
                 {
                   name: 'args',
-                  args: [],
+                  args: [
+                    {
+                      name: 'includeDeprecated',
+                      type: {
+                        kind: 'SCALAR',
+                        name: 'Boolean',
+                        ofType: null,
+                      },
+                      defaultValue: 'false',
+                    },
+                  ],
                   type: {
                     kind: 'NON_NULL',
                     name: null,

src/type/introspection.ts

@@ -104,7 +104,17 @@ export const __Directive: GraphQLObjectType = new GraphQLObjectType({
         type: new GraphQLNonNull(
           new GraphQLList(new GraphQLNonNull(__InputValue)),
         ),
-        resolve: (directive) => directive.args,
+        args: {
+          includeDeprecated: {
+            type: GraphQLBoolean,
+            defaultValue: false,
+          },
+        },
+        resolve(field, { includeDeprecated }) {
+          return includeDeprecated
+            ? field.args
+            : field.args.filter((arg) => arg.deprecationReason == null);
+        },
       },
     } as GraphQLFieldConfigMap<GraphQLDirective, unknown>),
 });

src/utilities/__tests__/getIntrospectionQuery-test.ts

@@ -1,12 +1,26 @@
 import { expect } from 'chai';
 import { describe, it } from 'mocha';
 
+import { parse } from '../../language/parser';
+
+import { validate } from '../../validation/validate';
+
 import type { IntrospectionOptions } from '../getIntrospectionQuery';
+import { buildSchema } from '../buildASTSchema';
 import { getIntrospectionQuery } from '../getIntrospectionQuery';
 
+const dummySchema = buildSchema(`
+  type Query {
+    dummy: String
+  }
+`);
+
 function expectIntrospectionQuery(options?: IntrospectionOptions) {
   const query = getIntrospectionQuery(options);
 
+  const validationErrors = validate(dummySchema, parse(query));
+  expect(validationErrors).to.deep.equal([]);
+
   return {
     toMatch(name: string, times: number = 1): void {
       const pattern = toRegExp(name);

src/utilities/__tests__/printSchema-test.ts

@@ -767,7 +767,7 @@ describe('Type System Printer', () => {
         description: String
         isRepeatable: Boolean!
         locations: [__DirectiveLocation!]!
-        args: [__InputValue!]!
+        args(includeDeprecated: Boolean = false): [__InputValue!]!
       }
 
       """