Merge pull request #436 from acelaya-forks/feature/recover-pwa

Feature/recover pwa

.eslintrc

@@ -13,5 +13,6 @@
   "globals": {
     "process": true,
     "setImmediate": true
-  }
+  },
+  "ignorePatterns": ["src/service*.ts"]
 }

.github/workflows/deploy-preview.yml

@@ -0,0 +1,41 @@
+name: Deploy preview
+
+on:
+  pull_request_target: null
+
+jobs:
+  deploy:
+    runs-on: ubuntu-20.04
+    continue-on-error: true
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+        with:
+          repository: ${{ github.event.pull_request.head.repo.full_name }}
+          ref: ${{ github.event.pull_request.head.ref }}
+      - name: Use node.js 14.15
+        uses: actions/setup-node@v1
+        with:
+          node-version: 14.15
+      - name: Generate slug
+        id: generate_slug
+        run: echo "##[set-output name=slug;]$(echo ${GITHUB_HEAD_REF#refs/heads/} | sed -r 's/[~\^]+//g' | sed -r 's/[^a-zA-Z0-9]+/-/g' | sed -r 's/^-+\|-+$//g' | tr A-Z a-z)"
+      - name: Build
+        run: |
+          npm ci && \
+          node ./scripts/set-homepage.js /shlink-web-client/${{ steps.generate_slug.outputs.slug }} && \
+          rm src/service-worker.ts && \
+          npm run build
+      - name: Deploy
+        uses: JamesIves/github-pages-deploy-action@4.1.1
+        with:
+          branch: preview-env
+          folder: build
+          target-folder: ${{ steps.generate_slug.outputs.slug }}
+      - name: Publish env
+        uses: marocchino/sticky-pull-request-comment@v2
+        with:
+          header: Preview environment
+          message: |
+            ## Preview environment
+            https://shlinkio.github.io/shlink-web-client/${{ steps.generate_slug.outputs.slug }}/

CHANGELOG.md

@@ -4,6 +4,23 @@ All notable changes to this project will be documented in this file.
 
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/), and this project adheres to [Semantic Versioning](https://semver.org).
 
+## [3.1.2] - 2021-06-06
+### Added
+* *Nothing*
+
+### Changed
+* [#428](https://github.com/shlinkio/shlink-web-client/issues/428) Updated to StrykerJS 5.
+
+### Deprecated
+* *Nothing*
+
+### Removed
+* *Nothing*
+
+### Fixed
+* [#371](https://github.com/shlinkio/shlink-web-client/issues/371) Recovered PWA functionality.
+
+
 ## [3.1.1] - 2021-05-08
 ### Added
 * *Nothing*

config/paths.js

@@ -83,6 +83,7 @@ module.exports = {
   appNodeModules: resolveApp('node_modules'),
   publicUrl: getPublicUrl(resolveApp('package.json')),
   servedPath: getServedPath(resolveApp('package.json')),
+  swSrc: resolveModule(resolveApp, 'src/service-worker'),
 };
 
 module.exports.moduleFileExtensions = moduleFileExtensions;

config/webpack.config.js

@@ -13,6 +13,7 @@ const OptimizeCSSAssetsPlugin = require('optimize-css-assets-webpack-plugin');
 const safePostCssParser = require('postcss-safe-parser');
 const ManifestPlugin = require('webpack-manifest-plugin');
 const InterpolateHtmlPlugin = require('react-dev-utils/InterpolateHtmlPlugin');
+const WorkboxWebpackPlugin = require('workbox-webpack-plugin');
 const WatchMissingNodeModulesPlugin = require('react-dev-utils/WatchMissingNodeModulesPlugin');
 const ModuleScopePlugin = require('react-dev-utils/ModuleScopePlugin');
 const getCSSModuleLocalIdent = require('react-dev-utils/getCSSModuleLocalIdent');
@@ -32,6 +33,9 @@ const shouldInlineRuntimeChunk = process.env.INLINE_RUNTIME_CHUNK !== 'false';
 // Check if TypeScript is setup
 const useTypeScript = fs.existsSync(paths.appTsConfig);
 
+// Get the path to the uncompiled service worker (if it exists).
+const swSrc = paths.swSrc;
+
 // style files regexes
 const cssRegex = /\.css$/;
 const cssModuleRegex = /\.module\.css$/;
@@ -610,6 +614,18 @@ module.exports = (webpackEnv) => {
       // You can remove this if you don't use Moment.js:
       new webpack.IgnorePlugin(/^\.\/locale$/, /moment$/),
 
+      // Generate a service worker script that will precache, and keep up to date,
+      // the HTML & assets that are part of the webpack build.
+      isEnvProduction && fs.existsSync(swSrc) && new WorkboxWebpackPlugin.InjectManifest({
+        swSrc,
+        dontCacheBustURLsMatching: /\.[0-9a-f]{8}\./,
+        exclude: [ /\.map$/, /asset-manifest\.json$/, /LICENSE/ ],
+        // Bump up the default maximum size (2mb) that's precached,
+        // to make lazy-loading failure scenarios less likely.
+        // See https://github.com/cra-template/pwa/issues/13#issuecomment-722667270
+        maximumFileSizeToCacheInBytes: 5 * 1024 * 1024,
+      }),
+
       // TypeScript type checking
       useTypeScript &&
         new ForkTsCheckerWebpackPlugin({

package.json

@@ -57,16 +57,21 @@
     "redux": "^4.0.5",
     "redux-localstorage-simple": "^2.4.0",
     "redux-thunk": "^2.3.0",
-    "uuid": "^8.3.2"
+    "uuid": "^8.3.2",
+    "workbox-core": "^6.1.5",
+    "workbox-expiration": "^6.1.5",
+    "workbox-precaching": "^6.1.5",
+    "workbox-routing": "^6.1.5",
+    "workbox-strategies": "^6.1.5"
   },
   "devDependencies": {
     "@babel/core": "^7.13.8",
     "@babel/plugin-proposal-nullish-coalescing-operator": "^7.13.8",
     "@babel/plugin-proposal-optional-chaining": "^7.13.8",
     "@shlinkio/eslint-config-js-coding-standard": "~1.2.2",
-    "@stryker-mutator/core": "^4.4.1",
-    "@stryker-mutator/jest-runner": "^4.4.1",
-    "@stryker-mutator/typescript-checker": "^4.4.1",
+    "@stryker-mutator/core": "^5.0.0",
+    "@stryker-mutator/jest-runner": "^5.0.0",
+    "@stryker-mutator/typescript-checker": "^5.0.0",
     "@svgr/webpack": "^5.5.0",
     "@types/chart.js": "^2.9.31",
     "@types/classnames": "^2.2.11",
@@ -146,7 +151,8 @@
     "webpack": "^4.44.2",
     "webpack-dev-server": "^3.11.0",
     "webpack-manifest-plugin": "^2.2.0",
-    "whatwg-fetch": "^3.5.0"
+    "whatwg-fetch": "^3.5.0",
+    "workbox-webpack-plugin": "^6.1.5"
   },
   "babel": {
     "presets": [

scripts/set-homepage.js

@@ -0,0 +1,13 @@
+const argv = process.argv.slice(2);
+const [ homepage ] = argv;
+
+if (!homepage) {
+  throw new Error('Homepage has to be provided as the first arg for this script');
+}
+
+const packageJsonPath = `${__dirname}/../package.json`;
+const packageJson = require(packageJsonPath);
+const fs = require('fs');
+
+packageJson.homepage = homepage;
+fs.writeFileSync(packageJsonPath, JSON.stringify(packageJson, null, 2));

src/App.scss

@@ -1,4 +1,5 @@
 @import './utils/base';
+@import './utils/mixins/horizontal-align';
 
 .app-container {
   height: 100%;
@@ -24,3 +25,18 @@
     padding: 0 15px;
   }
 }
+
+.app__update-banner.app__update-banner {
+  @include horizontal-align();
+
+  position: fixed;
+  top: $headerHeight - 25px;
+  padding: 0 4rem 0 0;
+  z-index: 1040;
+  margin: 0;
+  color: var(--text-color);
+  text-align: center;
+  width: 700px;
+  max-width: calc(100% - 30px);
+  box-shadow: 0 0 1rem var(--brand-color);
+}

src/App.tsx

@@ -1,15 +1,19 @@
 import { useEffect, FC } from 'react';
 import { Route, Switch } from 'react-router-dom';
+import { Alert } from 'reactstrap';
 import NotFound from './common/NotFound';
 import { ServersMap } from './servers/data';
 import { Settings } from './settings/reducers/settings';
 import { changeThemeInMarkup } from './utils/theme';
+import { SimpleCard } from './utils/SimpleCard';
 import './App.scss';
 
 interface AppProps {
-  fetchServers: Function;
+  fetchServers: () => void;
   servers: ServersMap;
   settings: Settings;
+  resetAppUpdate: () => void;
+  appUpdated: boolean;
 }
 
 const App = (
@@ -20,7 +24,7 @@ const App = (
   EditServer: FC,
   Settings: FC,
   ShlinkVersionsContainer: FC,
-) => ({ fetchServers, servers, settings }: AppProps) => {
+) => ({ fetchServers, servers, settings, appUpdated, resetAppUpdate }: AppProps) => {
   useEffect(() => {
     // On first load, try to fetch the remote servers if the list is empty
     if (Object.keys(servers).length === 0) {
@@ -50,6 +54,17 @@ const App = (
           <ShlinkVersionsContainer />
         </div>
       </div>
+
+      <Alert
+        className="app__update-banner"
+        tag={SimpleCard}
+        color="secondary"
+        isOpen={appUpdated}
+        toggle={resetAppUpdate}
+      >
+        <h4 className="mb-4">This app has just been updated!</h4>
+        <p className="mb-0">Restart it to enjoy the new features.</p>
+      </Alert>
     </div>
   );
 };

src/app/reducers/appUpdates.ts

@@ -0,0 +1,18 @@
+import { Action } from 'redux';
+import { buildActionCreator, buildReducer } from '../../utils/helpers/redux';
+
+/* eslint-disable padding-line-between-statements */
+export const APP_UPDATE_AVAILABLE = 'shlink/appUpdates/APP_UPDATE_AVAILABLE';
+export const RESET_APP_UPDATE = 'shlink/appUpdates/RESET_APP_UPDATE';
+/* eslint-enable padding-line-between-statements */
+
+const initialState = false;
+
+export default buildReducer<boolean, Action<string>>({
+  [APP_UPDATE_AVAILABLE]: () => true,
+  [RESET_APP_UPDATE]: () => false,
+}, initialState);
+
+export const appUpdateAvailable = buildActionCreator(APP_UPDATE_AVAILABLE);
+
+export const resetAppUpdate = buildActionCreator(RESET_APP_UPDATE);

src/app/services/provideServices.ts

@@ -0,0 +1,26 @@
+import Bottle from 'bottlejs';
+import { appUpdateAvailable, resetAppUpdate } from '../reducers/appUpdates';
+import App from '../../App';
+import { ConnectDecorator } from '../../container/types';
+
+const provideServices = (bottle: Bottle, connect: ConnectDecorator) => {
+  // Components
+  bottle.serviceFactory(
+    'App',
+    App,
+    'MainHeader',
+    'Home',
+    'MenuLayout',
+    'CreateServer',
+    'EditServer',
+    'Settings',
+    'ShlinkVersionsContainer',
+  );
+  bottle.decorator('App', connect([ 'servers', 'settings', 'appUpdated' ], [ 'fetchServers', 'resetAppUpdate' ]));
+
+  // Actions
+  bottle.serviceFactory('appUpdateAvailable', () => appUpdateAvailable);
+  bottle.serviceFactory('resetAppUpdate', () => resetAppUpdate);
+};
+
+export default provideServices;

src/common/Home.tsx

@@ -3,9 +3,9 @@ import { Link } from 'react-router-dom';
 import { Card, Row } from 'reactstrap';
 import { ExternalLink } from 'react-external-link';
 import ServersListGroup from '../servers/ServersListGroup';
-import './Home.scss';
 import { ServersMap } from '../servers/data';
 import { ShlinkLogo } from './img/ShlinkLogo';
+import './Home.scss';
 
 export interface HomeProps {
   servers: ServersMap;

src/container/index.ts

@@ -2,7 +2,6 @@ import Bottle, { IContainer } from 'bottlejs';
 import { withRouter } from 'react-router-dom';
 import { connect as reduxConnect } from 'react-redux';
 import { pick } from 'ramda';
-import App from '../App';
 import provideApiServices from '../api/services/provideServices';
 import provideCommonServices from '../common/services/provideServices';
 import provideShortUrlsServices from '../short-urls/services/provideServices';
@@ -13,6 +12,7 @@ import provideUtilsServices from '../utils/services/provideServices';
 import provideMercureServices from '../mercure/services/provideServices';
 import provideSettingsServices from '../settings/services/provideServices';
 import provideDomainsServices from '../domains/services/provideServices';
+import provideAppServices from '../app/services/provideServices';
 import { ConnectDecorator } from './types';
 
 type LazyActionMap = Record<string, Function>;
@@ -33,19 +33,7 @@ const connect: ConnectDecorator = (propsFromState: string[] | null, actionServic
     actionServiceNames.reduce(mapActionService, {}),
   );
 
-bottle.serviceFactory(
-  'App',
-  App,
-  'MainHeader',
-  'Home',
-  'MenuLayout',
-  'CreateServer',
-  'EditServer',
-  'Settings',
-  'ShlinkVersionsContainer',
-);
-bottle.decorator('App', connect([ 'servers', 'settings' ], [ 'fetchServers' ]));
-
+provideAppServices(bottle, connect);
 provideCommonServices(bottle, connect, withRouter);
 provideApiServices(bottle);
 provideShortUrlsServices(bottle, connect);

src/container/types.ts

@@ -35,6 +35,7 @@ export interface ShlinkState {
   settings: Settings;
   domainsList: DomainsList;
   visitsOverview: VisitsOverview;
+  appUpdated: boolean;
 }
 
 export type ConnectDecorator = (props: string[] | null, actions?: string[]) => any;

src/index.tsx

@@ -5,6 +5,7 @@ import { homepage } from '../package.json';
 import container from './container';
 import store from './container/store';
 import { fixLeafletIcons } from './utils/helpers/leaflet';
+import { register as registerServiceWorker } from './serviceWorkerRegistration';
 import 'react-datepicker/dist/react-datepicker.css';
 import 'leaflet/dist/leaflet.css';
 import './index.scss';
@@ -12,7 +13,7 @@ import './index.scss';
 // This overwrites icons used for leaflet maps, fixing some issues caused by webpack while processing the CSS
 fixLeafletIcons();
 
-const { App, ScrollToTop, ErrorHandler } = container;
+const { App, ScrollToTop, ErrorHandler, appUpdateAvailable } = container;
 
 render(
   <Provider store={store}>
@@ -26,3 +27,12 @@ render(
   </Provider>,
   document.getElementById('root'),
 );
+
+// If you want your app to work offline and load faster, you can change
+// unregister() to register() below. Note this comes with some pitfalls.
+// Learn more about service workers: https://cra.link/PWA
+registerServiceWorker({
+  onUpdate() {
+    store.dispatch(appUpdateAvailable()); // eslint-disable-line @typescript-eslint/no-unsafe-call
+  },
+});

src/reducers/index.ts

@@ -17,6 +17,7 @@ import mercureInfoReducer from '../mercure/reducers/mercureInfo';
 import settingsReducer from '../settings/reducers/settings';
 import domainsListReducer from '../domains/reducers/domainsList';
 import visitsOverviewReducer from '../visits/reducers/visitsOverview';
+import appUpdatesReducer from '../app/reducers/appUpdates';
 import { ShlinkState } from '../container/types';
 
 export default combineReducers<ShlinkState>({
@@ -38,4 +39,5 @@ export default combineReducers<ShlinkState>({
   settings: settingsReducer,
   domainsList: domainsListReducer,
   visitsOverview: visitsOverviewReducer,
+  appUpdated: appUpdatesReducer,
 });

src/service-worker.ts

@@ -0,0 +1,80 @@
+/// <reference lib="webworker" />
+/* eslint-disable no-restricted-globals */
+
+// This service worker can be customized!
+// See https://developers.google.com/web/tools/workbox/modules
+// for the list of available Workbox modules, or add any other
+// code you'd like.
+// You can also remove this file if you'd prefer not to use a
+// service worker, and the Workbox build step will be skipped.
+
+import { clientsClaim } from 'workbox-core';
+import { ExpirationPlugin } from 'workbox-expiration';
+import { precacheAndRoute, createHandlerBoundToURL } from 'workbox-precaching';
+import { registerRoute } from 'workbox-routing';
+import { StaleWhileRevalidate } from 'workbox-strategies';
+
+declare const self: ServiceWorkerGlobalScope;
+
+clientsClaim();
+
+// Precache all of the assets generated by your build process.
+// Their URLs are injected into the manifest variable below.
+// This variable must be present somewhere in your service worker file,
+// even if you decide not to use precaching. See https://cra.link/PWA
+precacheAndRoute(self.__WB_MANIFEST);
+
+// Set up App Shell-style routing, so that all navigation requests
+// are fulfilled with your index.html shell. Learn more at
+// https://developers.google.com/web/fundamentals/architecture/app-shell
+const fileExtensionRegexp = new RegExp('/[^/?]+\\.[^/]+$');
+registerRoute(
+  // Return false to exempt requests from being fulfilled by index.html.
+  ({ request, url }: { request: Request; url: URL }) => {
+    // If this isn't a navigation, skip.
+    if (request.mode !== 'navigate') {
+      return false;
+    }
+
+    // If this is a URL that starts with /_, skip.
+    if (url.pathname.startsWith('/_')) {
+      return false;
+    }
+
+    // If this looks like a URL for a resource, because it contains
+    // a file extension, skip.
+    if (url.pathname.match(fileExtensionRegexp)) {
+      return false;
+    }
+
+    // Return true to signal that we want to use the handler.
+    return true;
+  },
+  createHandlerBoundToURL(process.env.PUBLIC_URL + '/index.html')
+);
+
+// An example runtime caching route for requests that aren't handled by the
+// precache, in this case same-origin .png requests like those from in public/
+registerRoute(
+  // Add in any other file extensions or routing criteria as needed.
+  ({ url }) => url.origin === self.location.origin && url.pathname.endsWith('.png'),
+  // Customize this strategy as needed, e.g., by changing to CacheFirst.
+  new StaleWhileRevalidate({
+    cacheName: 'images',
+    plugins: [
+      // Ensure that once this runtime cache reaches a maximum size the
+      // least-recently used images are removed.
+      new ExpirationPlugin({ maxEntries: 50 }),
+    ],
+  })
+);
+
+// This allows the web app to trigger skipWaiting via
+// registration.waiting.postMessage({type: 'SKIP_WAITING'})
+self.addEventListener('message', (event) => {
+  if (event.data && event.data.type === 'SKIP_WAITING') {
+    self.skipWaiting();
+  }
+});
+
+// Any other custom service worker logic can go here.

src/serviceWorkerRegistration.ts

@@ -0,0 +1,142 @@
+// This optional code is used to register a service worker.
+// register() is not called by default.
+
+// This lets the app load faster on subsequent visits in production, and gives
+// it offline capabilities. However, it also means that developers (and users)
+// will only see deployed updates on subsequent visits to a page, after all the
+// existing tabs open on the page have been closed, since previously cached
+// resources are updated in the background.
+
+// To learn more about the benefits of this model and instructions on how to
+// opt-in, read https://cra.link/PWA
+
+const isLocalhost = Boolean(
+  window.location.hostname === 'localhost' ||
+    // [::1] is the IPv6 localhost address.
+    window.location.hostname === '[::1]' ||
+    // 127.0.0.0/8 are considered localhost for IPv4.
+    window.location.hostname.match(/^127(?:\.(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)){3}$/)
+);
+
+type Config = {
+  onSuccess?: (registration: ServiceWorkerRegistration) => void;
+  onUpdate?: (registration: ServiceWorkerRegistration) => void;
+};
+
+export function register(config?: Config) {
+  if (process.env.NODE_ENV === 'production' && 'serviceWorker' in navigator) {
+    // The URL constructor is available in all browsers that support SW.
+    const publicUrl = new URL(process.env.PUBLIC_URL ?? '', window.location.href);
+    if (publicUrl.origin !== window.location.origin) {
+      // Our service worker won't work if PUBLIC_URL is on a different origin
+      // from what our page is served on. This might happen if a CDN is used to
+      // serve assets; see https://github.com/facebook/create-react-app/issues/2374
+      return;
+    }
+
+    window.addEventListener('load', () => {
+      const swUrl = `${process.env.PUBLIC_URL}/service-worker.js`;
+
+      if (isLocalhost) {
+        // This is running on localhost. Let's check if a service worker still exists or not.
+        checkValidServiceWorker(swUrl, config);
+
+        // Add some additional logging to localhost, pointing developers to the
+        // service worker/PWA documentation.
+        navigator.serviceWorker.ready.then(() => {
+          console.log(
+            'This web app is being served cache-first by a service ' +
+              'worker. To learn more, visit https://cra.link/PWA'
+          );
+        });
+      } else {
+        // Is not localhost. Just register service worker
+        registerValidSW(swUrl, config);
+      }
+    });
+  }
+}
+
+function registerValidSW(swUrl: string, config?: Config) {
+  navigator.serviceWorker
+    .register(swUrl)
+    .then((registration) => {
+      registration.onupdatefound = () => {
+        const installingWorker = registration.installing;
+        if (installingWorker == null) {
+          return;
+        }
+        installingWorker.onstatechange = () => {
+          if (installingWorker.state === 'installed') {
+            if (navigator.serviceWorker.controller) {
+              // At this point, the updated precached content has been fetched,
+              // but the previous service worker will still serve the older
+              // content until all client tabs are closed.
+              console.log(
+                'New content is available and will be used when all ' +
+                  'tabs for this page are closed. See https://cra.link/PWA.'
+              );
+
+              // Execute callback
+              if (config && config.onUpdate) {
+                config.onUpdate(registration);
+              }
+            } else {
+              // At this point, everything has been precached.
+              // It's the perfect time to display a
+              // "Content is cached for offline use." message.
+              console.log('Content is cached for offline use.');
+
+              // Execute callback
+              if (config && config.onSuccess) {
+                config.onSuccess(registration);
+              }
+            }
+          }
+        };
+      };
+    })
+    .catch((error) => {
+      console.error('Error during service worker registration:', error);
+    });
+}
+
+function checkValidServiceWorker(swUrl: string, config?: Config) {
+  // Check if the service worker can be found. If it can't reload the page.
+  fetch(swUrl, {
+    headers: { 'Service-Worker': 'script' },
+  })
+    .then((response) => {
+      // Ensure service worker exists, and that we really are getting a JS file.
+      const contentType = response.headers.get('content-type');
+      if (
+        response.status === 404 ||
+        (contentType != null && contentType.indexOf('javascript') === -1)
+      ) {
+        // No service worker found. Probably a different app. Reload the page.
+        navigator.serviceWorker.ready.then((registration) => {
+          registration.unregister().then(() => {
+            window.location.reload();
+          });
+        });
+      } else {
+        // Service worker found. Proceed as normal.
+        registerValidSW(swUrl, config);
+      }
+    })
+    .catch(() => {
+      console.log('No internet connection found. App is running in offline mode.');
+    });
+}
+
+export function unregister() {
+  if ('serviceWorker' in navigator) {
+    navigator.serviceWorker.ready
+      .then((registration) => {
+        registration.unregister();
+      })
+      .catch((error) => {
+        console.error(error.message);
+      });
+  }
+}

stryker.conf.js

@@ -6,7 +6,16 @@ module.exports = {
   tsconfigFile: 'tsconfig.json',
   testRunner: 'jest',
   reporters: [ 'progress', 'clear-text' ],
-  coverageAnalysis: 'perTest',
+  ignorePatterns: [
+    'coverage',
+    'reports',
+    'build',
+    'dist',
+    'home',
+    'scripts',
+    'docker-compose.*',
+    'public/servers.json*',
+  ],
   jest: {
     projectType: 'custom',
     config: jestConfig,

test/App.test.tsx

@@ -1,23 +1,36 @@
 import { shallow, ShallowWrapper } from 'enzyme';
 import { Route } from 'react-router-dom';
-import { identity } from 'ramda';
 import { Mock } from 'ts-mockery';
+import { Alert } from 'reactstrap';
 import { Settings } from '../src/settings/reducers/settings';
 import appFactory from '../src/App';
 
 describe('<App />', () => {
   let wrapper: ShallowWrapper;
   const MainHeader = () => null;
+  const ShlinkVersions = () => null;
 
   beforeEach(() => {
-    const App = appFactory(MainHeader, () => null, () => null, () => null, () => null, () => null, () => null);
+    const App = appFactory(MainHeader, () => null, () => null, () => null, () => null, () => null, ShlinkVersions);
 
-    wrapper = shallow(<App fetchServers={identity} servers={{}} settings={Mock.all<Settings>()} />);
+    wrapper = shallow(
+      <App
+        fetchServers={() => {}}
+        servers={{}}
+        settings={Mock.all<Settings>()}
+        appUpdated={false}
+        resetAppUpdate={() => {}}
+      />,
+    );
   });
   afterEach(() => wrapper.unmount());
 
   it('renders a header', () => expect(wrapper.find(MainHeader)).toHaveLength(1));
 
+  it('renders versions', () => expect(wrapper.find(ShlinkVersions)).toHaveLength(1));
+
+  it('renders an Alert', () => expect(wrapper.find(Alert)).toHaveLength(1));
+
   it('renders app main routes', () => {
     const routes = wrapper.find(Route);
     const expectedPaths = [

test/app/reducers/appUpdates.test.ts

@@ -0,0 +1,30 @@
+import reducer, {
+  APP_UPDATE_AVAILABLE,
+  RESET_APP_UPDATE,
+  appUpdateAvailable,
+  resetAppUpdate,
+} from '../../../src/app/reducers/appUpdates';
+
+describe('appUpdatesReducer', () => {
+  describe('reducer', () => {
+    it('returns true on APP_UPDATE_AVAILABLE', () => {
+      expect(reducer(undefined, { type: APP_UPDATE_AVAILABLE })).toEqual(true);
+    });
+
+    it('returns false on RESET_APP_UPDATE', () => {
+      expect(reducer(undefined, { type: RESET_APP_UPDATE })).toEqual(false);
+    });
+  });
+
+  describe('appUpdateAvailable', () => {
+    test('creates expected action', () => {
+      expect(appUpdateAvailable()).toEqual({ type: APP_UPDATE_AVAILABLE });
+    });
+  });
+
+  describe('resetAppUpdate', () => {
+    test('creates expected action', () => {
+      expect(resetAppUpdate()).toEqual({ type: RESET_APP_UPDATE });
+    });
+  });
+});