JEST unit testcase - beginner and facing issues - unit-testing

im trying to to convert below code snippet to JEST unit testing but its throwing error please help me out in resolving it
import React from 'react'
import { BrowserRouter as Router, Switch, Route} from 'react-router-dom';
import IdleTimer from 'react-idle-timer';
import { ApolloProvider } from '#apollo/react-hooks';
import Dashboard from '../pages/Dashboard';
import Loader from '../components/Loader';
import Alert from '../components/Alert';
import NoAccess from '../pages/NoAccess';
import { GQL } from '../services/GQL';
import { IdleTimeOutModal } from './IdleTimeoutModal';
import PropTypes from 'prop-types';
import 'bootstrap/dist/css/bootstrap.min.css';
import '../App.scss';
import '../assets/css/loader.scss';
import AuthenticatedRoute from '../guards/AuthenticatedRoute';
import auth from '../services/Auth';
import { connect } from 'react-redux';
class Layout extends React.Component {
constructor(props){
super(props);
this.state = {
timeout:1000 * 900 * 1,
showModal: false,
userLoggedIn: window.localStorage.getItem('loginUser'),
isTimedOut: false,
}
this.idleTimer = null
this.onAction = this._onAction.bind(this)
this.onActive = this._onActive.bind(this)
this.onIdle = this._onIdle.bind(this)
this.handleClose = this.handleClose.bind(this)
this.handleLogout = this.handleLogout.bind(this)
}
_onAction(e) {
// console.log('user did something', e)
this.setState({isTimedOut: false})
}
_onActive(e) {
// console.log('user is active', e)
this.setState({isTimedOut: false})
}
_onIdle(e) {
// console.log('user is idle', e)
const isTimedOut = this.state.isTimedOut
if (isTimedOut) {
this.setState({showModal: false})
window.localStorage.setItem('loginUser', 'false');
} else {
this.setState({showModal: true})
this.idleTimer.reset();
this.setState({isTimedOut: true})
}
}
handleClose() {
this.setState({showModal: false})
}
handleLogout() {
this.setState({showModal: false})
auth.signout();
}
render(){
// console.log(window.location)
const {match} = window.location.href;
// const { match } = this.location
return(
<>
<IdleTimer
ref={ref => { this.idleTimer = ref }}
element={document}
onActive={this.onActive}
onIdle={this.onIdle}
onAction={this.onAction}
debounce={250}
timeout={this.state.timeout} />
<div className="">
<ApolloProvider client={GQL}>
<Router>
<Switch>
{/* <Route component={NoAccess} path="/no-access" exact={true} /> */}
<AuthenticatedRoute path={`${window.location.pathname}`} component={Dashboard} />
</Switch>
</Router>
{/* <Loader isOpen={loader.isLoading} /> */}
{/* <Alert /> */}
</ApolloProvider>
<IdleTimeOutModal
showModal={this.state.showModal}
handleClose={this.handleClose}
handleLogout={this.handleLogout}
/>
</div>
</>
)
}
}
***JEST throwing error while converting to JEST - ShallowWrapper::state() can only be called on class components
jest help***
export default connect((props) =>({
match: props.uiel.isRequired,
history: props.uiel.isRequired
}))(Layout);
import React from 'react';
import { BrowserRouter as Router, Switch, Route} from 'react-router-dom';
import { render, cleanup, fireEvent } from '#testing-library/react';
import '#testing-library/jest-dom/extend-expect';
import Enzyme, { shallow, mount } from 'enzyme';
import Layout from './Layout';
import Adapter from 'enzyme-adapter-react-16';
import { Provider } from "react-redux";
import configureMockStore from "redux-mock-store";
import { IdleTimeOutModal } from './IdleTimeoutModal';
import { wrap } from 'module';
Enzyme.configure({ adapter: new Adapter() })
const mockStore = configureMockStore();
let handleLogout:any;
let showModal: any;
let handleClose:any;
let remainingTime:any;
let _onAction:any;
let _onIdle:any;
let _onActive:any;
let idleTimer:any;
describe("Render Layout Component", ()=>{
let store;
let wrapperlayout:any;
beforeEach(()=>{
store = mockStore({
loader: false
});
wrapperlayout = shallow(
<Provider store={store}>
<Layout />
</Provider>
);
});
it('should render the value of color', () => {
wrapperlayout.setProps({ timeout:1000 * 900 * 1 });
wrapperlayout.setProps({ showModal: false });
wrapperlayout.setProps({ userLoggedIn: window.localStorage.getItem('loginUser') });
wrapperlayout.setProps({ isTimedOut: false });
//expect(wrapper.state('color')).toEqual('transparent');
});
it("should increment index - function test", () => {
//const app = shallow(<Normal />);
expect(wrapperlayout.state("isTimedOut")).toEqual('false');
wrapperlayout.instance()._onAction();
expect(wrapperlayout.state("isTimedOut")).toEqual('false');
});
test("Render Modal Layout", ()=>{
expect(wrapperlayout.exists()).toBe(true);
});
});

Related

TestingLibraryElementError: Unable to find an element Conditional based data-testid in #testing-library/react

I have written many test cases in the react testing library, I got stuck in the accessing condition based DOM element. I have tried many ways using import { renderHook } from '#testing-library/react-hooks'. But didn't work from me. Here is the code. Great appreciate
import axios from "axios";
import { withTranslation } from "react-i18next";
function MDStaticContent({ t }) {
const [promoArrayIsValid, setPromoArrayIsValid] = useState(false);
const loadRecent = async () => {
API Calls Here
const recents = await onRecentMedia(accounts[0], instance);
if (Some condition) {
if (Here Some condition) {
setPromoArrayIsValid(true);
}
dispatch(Here Will discpatch data);
}
};
return (
<>
{ promoArrayIsValid && (
<div data-testid="mdStaticContent">
Hello
</div>
</>
)}
}
import React from "react";
import { render, cleanup } from "#testing-library/react";
import { useEffect, useState } from "react";
import { Provider } from 'react-redux';
import "#testing-library/jest-dom/extend-expect";
import { MemoryRouter } from 'react-router-dom';
import configureMockStore from 'redux-mock-store';
import { ThemeProvider } from 'styled-components';
import thunk from 'redux-thunk';
import MDStaticContent from "./MDStaticContent";
import { act } from 'react-dom/test-utils';
import MockAPIData from '../resources/locales/en/MockAPIData.json';
import { renderHook } from '#testing-library/react-hooks'
const mockStore = configureMockStore([thunk]);
let data = {
mediaArrayIsValid: true,
promoArrayIsValid: true
}
const store = mockStore(data);
it("should take a snapshot and match of MDStaticContent Page", () => {
const { asFragment, getAllByTestId, getByTestId
} = render(
<ThemeProvider theme={theme}>
<Provider store={store}>
<MemoryRouter>
<MDStaticContent/>
</MemoryRouter>
</Provider>
</ThemeProvider>
);
expect(asFragment()).toMatchSnapshot();
expect(getAllByTestId("mdStaticContent")).toHaveLength(1);
expect(getByTestId("mdStaticContent")).toBeVisible();
});

this.$apollo always undefined

I'm trying to use apollo (+ vue, django) but for some reason it won't get loaded/used in a component,this.$apollo is always undefined.
<script>
import { GET_ALL_USERS_QUERY } from '../js/graphql/queries/userQueries.js'
export default {
name: 'GraphQLTest',
data() {
return {
users: [],
loading: true
}
},
async mounted() {
this.loading = true
this.users = await this.$apollo.query({
query: GET_ALL_USERS_QUERY
})
this.loading = false
}
}
</script>
[Vue warn]: Error in mounted hook (Promise/async): "TypeError: Cannot read property 'query' of undefined"
main.js
import Vue from 'vue'
import { router } from './routes.js'
import store from './store.js'
import { createProvider } from './apollo.js'
import App from './App.vue'
Vue.config.productionTip = false
new Vue({
router,
store,
provide: createProvider(),
render: h => h(App),
}).$mount('#app')
apollo.js
import Vue from 'vue'
import VueApollo from 'vue-apollo'
import { createApolloClient, restartWebsockets } from 'vue-cli-plugin-apollo/graphql-client'
// Install the vue plugin
Vue.use(VueApollo)
// Name of the localStorage item
const AUTH_TOKEN = 'jwt-token'
// Config
const defaultOptions = {
httpEndpoint: '/graphql',
wsEndpoint: null,
tokenName: AUTH_TOKEN,
persisting: false,
websocketsOnly: false,
ssr: false
}
// Call this in the Vue app file
export function createProvider (options = {}) {
// Create apollo client
const { apolloClient, wsClient } = createApolloClient({
...defaultOptions,
...options
})
apolloClient.wsClient = wsClient
// Create vue apollo provider
const apolloProvider = new VueApollo({
defaultClient: apolloClient,
defaultOptions: {
$query: {
loadingKey: 'loading',
fetchPolicy: 'cache-and-network'
}
},
errorHandler (error) {
// eslint-disable-next-line no-console
console.log('%cError', 'background: red; color: white; padding: 2px 4px; border-radius: 3px; font-weight: bold;', error.message)
}
})
return apolloProvider
}
// Manually call this when user log in
export async function onLogin (apolloClient, token) {
localStorage.setItem(AUTH_TOKEN, token)
if (apolloClient.wsClient) restartWebsockets(apolloClient.wsClient)
try {
await apolloClient.resetStore()
} catch (e) {
// eslint-disable-next-line no-console
console.log('%cError on cache reset (login)', 'color: orange;', e.message)
}
}
// Manually call this when user log out
export async function onLogout (apolloClient) {
localStorage.removeItem(AUTH_TOKEN)
if (apolloClient.wsClient) restartWebsockets(apolloClient.wsClient)
try {
await apolloClient.resetStore()
} catch (e) {
// eslint-disable-next-line no-console
console.log('%cError on cache reset (logout)', 'color: orange;', e.message)
}
}
Why is apollo never loaded? something missing in the config?
[edit: same thing happens when following the tutorial : ]
import Vue from "vue"
import App from "./App.vue"
import { router } from './routes.js'
import ApolloClient from "apollo-boost"
import VueApollo from "vue-apollo"
const apolloProvider = new VueApollo({
defaultClient: new ApolloClient({
uri: "http://localhost:8000/graphql/"
})
})
Vue.use(VueApollo)
new Vue({
router,
el: "#app",
provide: apolloProvider.provide(),
render: h => h(App)
})
if you created your VUE project using vue-cli > 3 this will cause the issue with this.$apollo equal to undefined.

Vue.js w vuex : mocked action not executed

I am trying to test the following App.vue component when a click event is fired on the logout vue-router link...
App.vue
<template>
<div id="app">
<header id="header">
<nav>
<ul class="navigation">
<li id="home"><router-link :to="{ name: 'home' }">Home</router-link></li>
<li id="login" v-if="!isAuthenticated"><router-link :to="{ name: 'login' }">Login</router-link></li>
<li id="shoppinglists" v-if="isAuthenticated"><router-link :to="{ name: 'shoppinglists' }" >Shopping Lists</router-link></li>
<li id="logout" v-if="isAuthenticated">Logout</li>
</ul>
</nav>
</header><!-- /#header -->
<section id="page">
<router-view></router-view>
</section><!-- /#page -->
</div>
</template>
<script>
import store from '#/vuex/store'
import router from '#/router/index'
import { mapGetters } from 'vuex'
export default {
name: 'app',
computed: {
...mapGetters({ isAuthenticated: 'isAuthenticated' })
},
methods: {
logout () {
this. $store.dispatch('logout')
.then(() => {
window.localStorage.removeItem('vue-authenticate.vueauth_token')
this/$router.push({ name: 'home' })
})
}
},
store,
router
}
</script>
To test the logout click, I preset the isAuthenticated state to true, so the logout router link show up and I trigger the click event on it.
LOG: 'navigation: ', <ul class="navigation"><li id="home">
Home</li> <!---->
<li id="shoppinglists">Shopping Lists
</li> <li id="logout">Logout</li></ul>
I expect the action logout to have been called .. but it's not ... why ?
App.spec.js
import Vue from 'vue'
import Vuex from 'vuex'
import VueRouter from 'vue-router'
import App from '#/App'
import router from '#/router/index'
import { mount } from 'avoriaz'
import sinon from 'sinon'
Vue.use(Vuex)
Vue.use(VueRouter)
describe('App.vue', () => {
let actions
let getters
let store
beforeEach(() => {
getters = {
isAuthenticated: (state) => {
return state.isAuthenticated
}
}
actions = {
logout: sinon.stub().returns(Promise.resolve(true))
}
store = new Vuex.Store({
getters,
actions,
state: {
isAuthenticated: true,
currentUserId: ''
}
})
router
})
it('calls logout method', () => {
const wrapper = mount(App, { router, store })
console.log('navigation: ', wrapper.find('ul.navigation')[0].element)
const logoutLink = wrapper.find('#logout a')[0]
logoutLink.trigger('click')
expect(actions.logout.calledOnce).to.equal(true)
})
})
vuex/actions.js
import { IS_AUTHENTICATED, CURRENT_USER_ID } from './mutation_types'
import getters from './getters'
export default {
logout: ({commit}) => {
commit(IS_AUTHENTICATED, { isAuthenticated: false })
commit(CURRENT_USER_ID, { currentUserId: '' })
return true
}
}
vuex/mutations.js
import * as types from './mutation_types'
import getters from './getters'
export default {
[types.IS_AUTHENTICATED] (state, payload) {
state.isAuthenticated = payload.isAuthenticated
},
[types.CURRENT_USER_ID] (state, payload) {
state.currentUserId = payload.currentUserId
}
}
vuex/getters.js
export default {
isAuthenticated: (state) => {
return state.isAuthenticated
}
}
Finally , I found a way to test it :
import Vue from 'vue'
import Vuex from 'vuex'
import VueRouter from 'vue-router'
import App from '#/App'
import router from '#/router/index'
import { mount } from 'avoriaz'
import sinon from 'sinon'
Vue.use(Vuex)
Vue.use(VueRouter)
describe('App.vue', () => {
let actions
let getters
let store
let sandbox
let routerPush
beforeEach(() => {
sandbox = sinon.sandbox.create()
getters = {
isAuthenticated: (state) => {
return state.isAuthenticated
}
}
actions = {
logout: sandbox.stub().returns(Promise.resolve(true))
}
store = new Vuex.Store({
getters,
state: {
isAuthenticated: true,
currentUserId: ''
},
actions
})
router
})
afterEach(() => {
sandbox.restore()
})
it('calls logout method', (done) => {
const wrapper = mount(App, { store, router })
routerPush = sandbox.spy(wrapper.vm.$router, 'push')
const logoutLink = wrapper.find('#logout a')[0]
logoutLink.trigger('click')
wrapper.vm.$nextTick(() => {
expect(actions.logout.calledOnce).to.equal(true)
actions.logout().then(() => {
expect(routerPush).to.have.been.calledWith('/home')
})
done()
})
})
})

Mocha+Axios+Sinon+chai unit testing

i have a react component with function as below that calls api service using axios.I would want to know how to write unit test using enzyme,sinon and chai.
import React from 'react';
import es6BindAll from 'es6bindall';
import { browserHistory } from 'react-router';
import axios from 'axios';
export default class Header extends React.Component {
constructor() {
super();
es6BindAll(this,['handleLogoutClick']);
}
handleLogoutClick(e) {
e.preventDefault();
let that = this;
this.serverRequest = axios({
url: 'Url_to_call',
method: 'post'
}).then(function (successData) {
browserHistory.push("nextPage to navigate");
}.bind(that));
}
render(){
return(
<div className="columns large-12 header-container">
<h6 className="logout" onClick={this.handleLogoutClick}>Logout</h6>
</div>
</div>
)
}
}
I have written test case as below
import React from 'react';
import { mount,shallow } from 'enzyme';
import { expect } from 'chai';
import sinon from 'sinon';
import '../testUtils';
import Header from '../../components/Common/Header';
describe('(Container) Header', () => {
const wrapper = shallow(<Header />);
let sandbox;
let server;
beforeEach(() => {
sandbox = sinon.sandbox.create();
server = sandbox.useFakeServer();
});
afterEach(() => {
server.restore();
sandbox.restore();
});
it('Logout link to be present', () => {
expect(wrapper.find('.logout')).to.exist;
});
it('simulates logout clicks', () => {
wrapper.find('h6').filter('.logout').simulate('click',{preventDefault() {} });
expect(wrapper.instance().handleLogoutClick).to.have.been.called;
});
});
And configured testUtils.js as below
var jsdom = require('jsdom').jsdom;
global.document = jsdom('');
global.window = document.defaultView;
Object.keys(document.defaultView).forEach((property) => {
if (typeof global[property] === 'undefined') {
global[property] = document.defaultView[property];
}
});
global.window.loggedInUserData = {userName: 'TestName'};
global.navigator = {
userAgent: 'node.js'
};
Please let me know how to test axios and mock browserHistory.I am not running on any browser to test so please let me know how to mock
Thanks
You need to stub browserHistory using sinon as below,
import { browserHistory } from 'react-router';
import { stub } from 'sinon';
const browserHistoryPushStub = stub(browserHistory, 'push', () => { });
For mocking axios requests, you can use Moxios

cordova.fileTransfer not updating page template Ionic2+Cordova

I have created an Ionic2 App using cordova FileTransferplugin, i am downloading remote server file.
Everything is working perfectly, but when I try to update template while fileTransfer.OnProgress event, the template is not updating the % downloaded.
Pleas see this video for my problem.
Ionic_youtube_link
My Code is, logic is in downloadFile function
import {Component, AfterViewInit, ViewChild} from '#angular/core';
import {NavController, NavParams, ViewController, Nav} from 'ionic-angular';
import {Page, Platform} from 'ionic-angular';
import {File, Device, Cordova, Transfer} from 'ionic-native';
import { SafeResourceUrl, DomSanitizationService } from '#angular/platform-browser';
#Component({
templateUrl: 'build/pages/video-download-modal/video-download-modal.html',
providers: [File, Transfer]
})
export class VideoDownloadModal {
selectedItem: any;
#ViewChild(Nav) nav: Nav;
videoPathUrl: string;
isPlatformReady: boolean;
platformName: string;
directoryName: string = "socialAppDir";
totalVideoSize:number;
totalDownloaded:number;
totalPercent:string = "0%";
constructor(public navCtrl: NavController, navParams: NavParams, private _viewController: ViewController, platform: Platform, private transfer:Transfer) {
// If we navigated to this page, we will have an item available as a nav param
if (platform.is('core')) {//if on dekstop
console.log('dektop');
} else {
this.videoPathUrl = navParams.get('videoPath');
console.log(this.videoPathUrl);
platform.ready().then((readySource) => {
this.isPlatformReady = true;
console.log('ready 1234');
const fs: string = cordova.file.externalRootDirectory;
console.log(cordova.file.dataDirectory);
this.platformName = Device.device.platform;
File.checkDir(cordova.file.externalDataDirectory, this.directoryName).then(() => {
console.log('directory exists');
this.downloadFile();
}, (error) => {
console.log('directory not exists');
this.createDirectory();
})
})
}
}
dismiss() {
let data = { 'foo': 'bar' };
this._viewController.dismiss(data);
}
createDirectory():void{
File.createDir(cordova.file.externalDataDirectory, this.directoryName, true).then(() => {
console.log("created externalDataDirectory");
this.downloadFile();
},(error) => {
console.log('some error happen')
})
}
downloadFile = () => {
console.log(this);
let fileName: string = this.videoPathUrl.split("/").pop();
let targetPath = cordova.file.externalDataDirectory + this.directoryName + "/" + fileName;
console.log(targetPath);
this.transfer.download(this.videoPathUrl, targetPath, true, {}).then(() => {
console.log('video downloaded')
}, (error) => {
console.log(error)
})
this.transfer.onProgress((progress) => {
console.log(this);
this.totalVideoSize = progress.total;
this.totalDownloaded = progress.loaded;
this.totalPercent = ((progress.loaded / progress.total) * 100).toString();
console.log(this.totalPercent);
})
}
ionViewDidEnter() {
console.log("enter login1");
}
}
And HTML is
<ion-content>
<div id="modalContainer" class="abd">
<ion-spinner></ion-spinner>
<br />
{{**totalPercent**}}
<br />
<button dnager block (click)="dismiss()">Exit</button>
</div>
</ion-content>
The totalPercent value either has 0 or 100.But not updating.
Please help.
This is because the totalPercent of this inside the handler was set to the global Window object instead of the object itself.
I have finally got it to work
import { NgZone } from '#angular/core';
fileTransfer.onProgress((progressEvent: ProgressEvent) => {
this.ngZone.run(() => {
if (progressEvent.lengthComputable) {
let lp = progressEvent.loaded / progressEvent.total * 100;
this.loadingPercent = Math.round(lp * 100) / 100;
}
});
})