[App Search] 100% code coverage plus fix console error (#101407)

x-pack/plugins/enterprise_search/public/applications/__mocks__/flash_messages_logic.mock.ts

@@ -15,6 +15,7 @@ export const mockFlashMessagesActions = {
   clearFlashMessages: jest.fn(),
   setQueuedMessages: jest.fn(),
   clearQueuedMessages: jest.fn(),
+  dismissToastMessage: jest.fn(),
 };
 
 export const mockFlashMessageHelpers = {

x-pack/plugins/enterprise_search/public/applications/app_search/components/library/library.tsx

@@ -5,6 +5,8 @@
  * 2.0.
  */
 
+/* istanbul ignore file */
+
 import React, { useState } from 'react';
 
 import {

x-pack/plugins/enterprise_search/public/applications/app_search/index.test.tsx

@@ -26,6 +26,7 @@ import { EngineRouter, EngineNav } from './components/engine';
 import { EngineCreation } from './components/engine_creation';
 import { EnginesOverview } from './components/engines';
 import { ErrorConnecting } from './components/error_connecting';
+import { Library } from './components/library';
 import { MetaEngineCreation } from './components/meta_engine_creation';
 import { RoleMappingsRouter } from './components/role_mappings';
 import { SetupGuide } from './components/setup_guide';
@@ -147,6 +148,28 @@ describe('AppSearchConfigured', () => {
       });
     });
   });
+
+  describe('library', () => {
+    it('renders a library page in development', () => {
+      const OLD_ENV = process.env.NODE_ENV;
+      process.env.NODE_ENV = 'development';
+
+      rerender(wrapper);
+
+      expect(wrapper.find(Library)).toHaveLength(1);
+      process.env.NODE_ENV = OLD_ENV;
+    });
+
+    it("doesn't in production", () => {
+      const OLD_ENV = process.env.NODE_ENV;
+      process.env.NODE_ENV = 'production';
+
+      rerender(wrapper);
+
+      expect(wrapper.find(Library)).toHaveLength(0);
+      process.env.NODE_ENV = OLD_ENV;
+    });
+  });
 });
 
 describe('AppSearchNav', () => {