Add a functional test

test/functional/apps/discover/_empty_state.ts

@@ -0,0 +1,30 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0 and the Server Side Public License, v 1; you may not use this file except
+ * in compliance with, at your election, the Elastic License 2.0 or the Server
+ * Side Public License, v 1.
+ */
+
+import expect from '@kbn/expect';
+import { FtrProviderContext } from '../../ftr_provider_context';
+
+export default function ({ getService, getPageObjects }: FtrProviderContext) {
+  const testSubjects = getService('testSubjects');
+  const kibanaServer = getService('kibanaServer');
+  const PageObjects = getPageObjects(['common', 'timePicker', 'discover']);
+
+  describe('empty state', () => {
+    before(async () => {
+      await kibanaServer.uiSettings.unset('defaultIndex');
+      await kibanaServer.savedObjects.clean({ types: ['search', 'index-pattern'] });
+    });
+
+    it('redirects to Overview app', async () => {
+      await PageObjects.common.navigateToApp('discover');
+      const selector = await testSubjects.find('kibanaChrome');
+      const content = await selector.findByCssSelector('.kbnNoDataPageContents');
+      expect(content).not.to.be(null);
+    });
+  });
+}

test/functional/apps/discover/index.ts

@@ -54,5 +54,6 @@ export default function ({ getService, loadTestFile }: FtrProviderContext) {
     loadTestFile(require.resolve('./_search_on_page_load'));
     loadTestFile(require.resolve('./_chart_hidden'));
     loadTestFile(require.resolve('./_context_encoded_url_param'));
+    loadTestFile(require.resolve('./_empty_state'));
   });
 }