Keeep React 17 adapter for RTL

test/utils/init.js

@@ -2,8 +2,21 @@ import './licenseRelease';
 import './licenseKey';
 import { unstable_resetCleanupTracking } from '@mui/x-data-grid';
 import { unstable_resetCleanupTracking as unstable_resetCleanupTrackingPro } from '@mui/x-data-grid-pro';
+import enzyme from 'enzyme';
+import Adapter from '@eps1lon/enzyme-adapter-react-17';
+import * as testingLibrary from '@testing-library/react/pure';
+import '@mui/monorepo/test/utils/initMatchers';
 
-export * from '@mui/monorepo/test/utils/init';
+enzyme.configure({ adapter: new Adapter() });
+
+// checking if an element is hidden is quite expensive
+// this is only done in CI as a fail safe. It can still explicitly be checked
+// in the test files which helps documenting what is part of the DOM but hidden
+// from assistive technology
+const defaultHidden = !process.env.CI;
+// adds verbosity for something that might be confusing
+console.warn(`${defaultHidden ? 'including' : 'excluding'} inaccessible elements by default`);
+testingLibrary.configure({ defaultHidden });
 
 const mochaHooks = {
   beforeEach: [],