How to use evtListenerMock method in Best

Best JavaScript code snippet using best

button.spec.js

Source:button.spec.js

1/*2 * Copyright (c) 2019, salesforce.com, inc.3 * All rights reserved.4 * SPDX-License-Identifier: MIT5 * For full license text, see the LICENSE file in the repo root or https://opensource.org/licenses/MIT6 */7import { createElement } from 'lwc';8import Element from 'lightning/button';9const createButton = (props = {}) => {10    const element = createElement('lightning-button', { is: Element });11    Object.assign(element, props);12    document.body.appendChild(element);13    return element;14};15describe('lightning-button', () => {16    it('should trigger focus when button is focused', () => {17        const element = createButton({});18        const evtListenerMock = jest.fn();19        element.addEventListener('focus', evtListenerMock);20        element.shadowRoot.querySelector('button').focus();21        expect(evtListenerMock).toHaveBeenCalled();22    });23    it('should trigger blur when button lost focus', () => {24        const element = createButton({});25        const evtListenerMock = jest.fn();26        element.addEventListener('blur', evtListenerMock);27        const btn = element.shadowRoot.querySelector('button');28        btn.focus();29        btn.blur();30        expect(evtListenerMock).toHaveBeenCalled();31    });32    it('should set title attribute on the button', () => {33        const element = createButton({ title: 'Click here' });34        const btn = element.shadowRoot.querySelector('button');35        expect(btn.getAttribute('title')).toBe('Click here');36        expect(element.getAttribute('title')).toBe(null);37    });38    it('should set aria-expanded attribute on the button when false', () => {39        const element = createButton({ ariaExpanded: 'false' });40        const btn = element.shadowRoot.querySelector('button');41        return Promise.resolve().then(() => {42            expect(btn.getAttribute('aria-expanded')).toBe('false');43            expect(element.getAttribute('aria-expanded')).toBe(null);44        });45    });46    it('should set aria-expanded attribute on the button when true', () => {47        const element = createButton({ ariaExpanded: 'true' });48        const btn = element.shadowRoot.querySelector('button');49        return Promise.resolve().then(() => {50            expect(btn.getAttribute('aria-expanded')).toBe('true');51            expect(element.getAttribute('aria-expanded')).toBe(null);52        });53    });54    it('shouldnt set aria-expanded attribute when boolean', () => {55        const element = createButton({ ariaExpanded: true });56        const btn = element.shadowRoot.querySelector('button');57        return Promise.resolve().then(() => {58            expect(btn.getAttribute('aria-expanded')).toBe(null);59            expect(element.getAttribute('aria-expanded')).toBe(null);60        });61    });62    it('should set aria-live attribute on the button', () => {63        const element = createButton({ ariaLive: 'polite' });64        const btn = element.shadowRoot.querySelector('button');65        return Promise.resolve().then(() => {66            expect(btn.getAttribute('aria-live')).toBe('polite');67            expect(element.getAttribute('aria-live')).toBe(null);68        });69    });70    it('should set aria-controls attribute on the button', () => {71        const element = createButton({ ariaControls: 'section1' });72        const btn = element.shadowRoot.querySelector('button');73        return Promise.resolve().then(() => {74            expect(element).toMatchSnapshot();75            expect(btn.getAttribute('aria-controls')).toEqual(76                expect.stringContaining('[shadow:guid]')77            );78            expect(element.getAttribute('aria-controls')).toBe(null);79        });80    });81    it('should set aria-label attribute on the button', () => {82        const element = createButton({ ariaLabel: 'btn1' });83        const btn = element.shadowRoot.querySelector('button');84        return Promise.resolve().then(() => {85            expect(btn.getAttribute('aria-label')).toBe('btn1');86            expect(element.getAttribute('aria-label')).toBe(null);87        });88    });89    it('should set aria-describedby attribute on the button', () => {90        const element = createButton({ ariaDescribedBy: 'section1' });91        const btn = element.shadowRoot.querySelector('button');92        return Promise.resolve().then(() => {93            expect(element).toMatchSnapshot();94            expect(btn.getAttribute('aria-describedby')).toEqual(95                '[shadow:guid]'96            );97            expect(element.getAttribute('aria-describedby')).toBe(null);98        });99    });100    it('aria-attributes should be present and true', () => {101        const element = createButton({102            label: 'Test',103            title: 'Click here',104            ariaExpanded: 'true',105            ariaAtomic: 'true'106        });107        const btn = element.shadowRoot.querySelector('button');108        return Promise.resolve().then(() => {109            expect(element).toMatchSnapshot();110            expect(btn.getAttribute('aria-expanded')).toBe('true');111            expect(btn.getAttribute('aria-atomic')).toBe('true');112        });113    });114    it('should set not set any aria-attributes', () => {115        const element = createButton({116            label: 'Test',117            title: 'Click here',118            tabIndex: '-1',119            ariaExpanded: null120        });121        const btn = element.shadowRoot.querySelector('button');122        return Promise.resolve().then(() => {123            expect(element).toMatchSnapshot();124            expect(btn.getAttribute('aria-expanded')).toBe(null);125            expect(btn.getAttribute('aria-atomic')).toBe(null);126        });127    });128    it('fires click event when button is clicked', () => {129        const element = createButton({ label: 'Submit' });130        const evtListenerMock = jest.fn();131        element.addEventListener('click', evtListenerMock);132        element.shadowRoot.querySelector('button').click();133        return Promise.resolve().then(() => {134            expect(evtListenerMock.mock.calls).toHaveLength(1);135        });136    });137    it('should set pointer-events to none when button is disabled', () => {138        const element = createButton({ label: 'Submit', disabled: true });139        expect(element.style.pointerEvents).toBe('none');140        element.disabled = false;141        return Promise.resolve()142            .then(() => {143                expect(element.style.pointerEvents).toBe('');144                element.disabled = true;145            })146            .then(() => {147                expect(element.style.pointerEvents).toBe('none');148            });149    });...

Using AI Code Generation

1var BestPractice = require('./BestPractice');2var bestPractice = new BestPractice();3bestPractice.evtListenerMock();4var BestPractice = function() {5    this.evtListenerMock = function() {6        var EventEmitter = require('events').EventEmitter;7        var emitter = new EventEmitter();8        emitter.on('event', function() {9            console.log('event');10        });11        emitter.emit('event');12    }13};14module.exports = BestPractice;

Using AI Code Generation

1var evtListenerMock = require('best-event-emitter').evtListenerMock;2var listener = evtListenerMock(function(err, data) {3  console.log('listener called with err: ' + err + ' and data: ' + data);4});5listener('err', 'data');6var BestEventEmitter = require('best-event-emitter');7var emitter = new BestEventEmitter();8emitter.on('test', function(err, data) {9  console.log('listener called with err: ' + err + ' and data: ' + data);10});11emitter.emit('test', 'err', 'data');12var BestEventEmitter = require('best-event-emitter');13var emitter = new BestEventEmitter();14emitter.on('test', function(err, data) {15  console.log('listener called with err: ' + err + ' and data: ' + data);16});17emitter.emit('test', 'err', 'data');18var BestEventEmitter = require('best-event-emitter');19var emitter = new BestEventEmitter();20emitter.on('test', function(err, data) {21  console.log('listener called with err: ' + err + ' and data: ' + data);22});23emitter.emit('test', 'err', 'data');24var BestEventEmitter = require('best-event-emitter');25var emitter = new BestEventEmitter();26emitter.on('test', function(err, data) {27  console.log('listener called with err: ' + err + ' and data: ' + data);28});29emitter.emit('test', 'err', 'data');30var BestEventEmitter = require('best-event-emitter');31var emitter = new BestEventEmitter();32emitter.on('test', function(err, data) {

Using AI Code Generation

1var BestEventEmitter = require('BestEventEmitter');2var evt = new BestEventEmitter();3evt.evtListenerMock('test', function() {4    console.log('test');5});6evt.emit('test');7var evt = new BestEventEmitter();8evt.evtListenerMock('test', function() {9    console.log('test');10});11evt.emit('test');12var evt = new BestEventEmitter();13evt.evtListenerMock('test', function() {14    console.log('test');15});16evt.emit('test');17var evt = new BestEventEmitter();18evt.evtListenerMock('test', function() {19    console.log('test');20});21evt.emit('test');22var evt = new BestEventEmitter();23evt.evtListenerMock('test', function() {24    console.log('test');25});26evt.emit('test');27var evt = new BestEventEmitter();28evt.evtListenerMock('test', function() {29    console.log('test');30});31evt.emit('test');32var evt = new BestEventEmitter();33evt.evtListenerMock('test', function() {34    console.log('test');35});36evt.emit('test');37var evt = new BestEventEmitter();38evt.evtListenerMock('test', function() {39    console.log('test');40});41evt.emit('test');42var evt = new BestEventEmitter();43evt.evtListenerMock('test', function() {44    console.log('test');45});46evt.emit('test');47var evt = new BestEventEmitter();48evt.evtListenerMock('test', function() {49    console.log('test');50});51evt.emit('test');52var evt = new BestEventEmitter();53evt.evtListenerMock('test', function() {54    console.log('test');55});56evt.emit('test');57var evt = new BestEventEmitter();58evt.evtListenerMock('test', function() {59    console.log('test');60});61evt.emit('test');62var evt = new BestEventEmitter();63evt.evtListenerMock('test', function() {64    console.log('test');65});66evt.emit('test');67var evt = new BestEventEmitter();68evt.evtListenerMock('test', function() {69    console.log('test');70});71evt.emit('test');72var evt = new BestEventEmitter();73evt.evtListenerMock('test', function() {74    console.log('test');75});76evt.emit('test');77var evt = new BestEventEmitter();78evt.evtListenerMock('test', function() {

Using AI Code Generation

1var BestEventEmitter = require('BestEventEmitter');2var myEmitter = new BestEventEmitter();3var evtListenerMock = myEmitter.evtListenerMock;4var evtListenerMock = myEmitter.evtListenerMock;5it('should call the event listener', function() {6  var listener = evtListenerMock();7  myEmitter.on('event', listener);8  myEmitter.emit('event');9  assert(listener.called);10});11it('should call the event listener with arguments', function() {12  var listener = evtListenerMock();13  myEmitter.on('event', listener);14  myEmitter.emit('event', 'arg1', 'arg2');15  assert(listener.calledWith('arg1', 'arg2'));16});17it('should call the event listener with arguments', function() {18  var listener = evtListenerMock();19  myEmitter.on('event', listener);20  myEmitter.emit('event', 'arg1', 'arg2');21  assert(listener.calledWith('arg1', 'arg2'));22});23it('should call the event listener with arguments', function() {24  var listener = evtListenerMock();25  myEmitter.on('event', listener);26  myEmitter.emit('event', 'arg1', 'arg2');27  assert(listener.calledWith('arg1', 'arg2'));28});29it('should call the event listener with arguments', function() {30  var listener = evtListenerMock();31  myEmitter.on('event', listener);32  myEmitter.emit('event',

Using AI Code Generation

1var BestBuyEvent = require('./BestBuyEvent.js');2var evt = BestBuyEvent.evtListenerMock();3evt.on('newProduct', function(data) {4    console.log('New product arrived at our warehouse: ' + data.name);5});6evt.emit('newProduct', { name: 'The Big Lebowski (Blu-ray)' });7var BestBuyEvent = require('./BestBuyEvent.js');8var evt = BestBuyEvent.evtListener();9evt.on('newProduct', function(data) {10    console.log('New product arrived at our warehouse: ' + data.name);11});12evt.emit('newProduct', { name: 'The Big Lebowski (Blu-ray)' });13var BestBuyEvent = require('./BestBuyEvent.js');14var evt = BestBuyEvent.evtListener();15evt.on('newProduct', function(data) {16    console.log('New product arrived at our warehouse: ' + data.name);17});18evt.emit('newProduct', { name: 'The Big Lebowski (Blu-ray)' });19var util = require('util');20var EventEmitter = require('events').EventEmitter;21var BestBuyEvent = function() {22    EventEmitter.call(this);23};24util.inherits(BestBuyEvent, EventEmitter);25BestBuyEvent.prototype.evtListenerMock = function() {26    var self = this;27    setTimeout(function() {28        self.emit('newProduct', { name: 'The Big Lebowski (Blu-ray)' });29    }, 2000);30    return this;31};32BestBuyEvent.prototype.evtListener = function() {33    var self = this;34    var request = require('request');35        if (!error && response.statusCode == 200) {36            var data = JSON.parse(body);37            console.log(data);38            self.emit('newProduct', data);39        }40    });41    return this;42};43module.exports = new BestBuyEvent();44var express = require('express');45var app = express();46var bodyParser = require('body-parser');47var http = require('http').Server(app);48var io = require('socket.io')(http);49app.use(bodyParser.json());50app.use(bodyParser.urlencoded({

Automation Testing Tutorials

Learn to execute automation testing from scratch with LambdaTest Learning Hub. Right from setting up the prerequisites to run your first automation test, to following best practices and diving deeper into advanced test scenarios. LambdaTest Learning Hubs compile a list of step-by-step guides to help you be proficient with different test automation frameworks i.e. Selenium, Cypress, TestNG etc.