Assert that your GraphQL schema can execute the introspectionQuery

index.test.js

const { execute, introspectionQuery, parse } = require('graphql');
const { schema } = require('../index');

describe('graphql', () => {
  describe('index', () => {
    describe('schema', () => {
      it('should be a an object', () => {
        expect(typeof schema).toBe('object');
      });

      it('should be able to execute the introspectionQuery', () =>
        execute(schema, parse(introspectionQuery)));
    });
  });
});