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Add JS tests for analytics & cookies JS
Includes: - tests for the analytics interface ported from GOVUK Frontend Toolkit - tests for the cookie banner that appears on all pages except the cookies page - tests for the cookies page JS - tests for the hasConsentFor function - adding a deleteCookie helper to remove cookies during tests - polyfill for insertAdjacentText The last one is because JSDOM doesn't support insertAdjacentText but our target browsers do. This polyfill also includes one for insertAdjacentHTML.
This commit is contained in:
Tom Byers
255
tests/javascripts/cookieSettings.test.js
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255
tests/javascripts/cookieSettings.test.js
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const helpers = require('./support/helpers');
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beforeAll(() => {
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require('../../app/assets/javascripts/govuk/cookie-functions.js');
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require('../../app/assets/javascripts/consent.js');
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require('../../app/assets/javascripts/analytics/analytics.js');
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require('../../app/assets/javascripts/analytics/init.js');
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require('../../app/assets/javascripts/cookieSettings.js');
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});
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afterAll(() => {
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require('./support/teardown.js');
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});
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describe("Cookie settings", () => {
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let cookiesPageContent;
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let yesRadio;
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let noRadio;
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let saveButton;
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beforeEach(() => {
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// add the script GA looks for in the document
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document.body.appendChild(document.createElement('script'));
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window.ga = jest.fn();
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jest.spyOn(window.GOVUK, 'initAnalytics');
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cookiesPageContent = `
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<div class="cookie-settings__confirmation banner banner-with-tick" data-cookie-confirmation="true" role="group" tabindex="-1">
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<h2 class="banner-title">Your cookie settings were saved</h2>
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<a class="govuk_link cookie-settings__prev-page" href="#" data-module="track-click" data-track-category="cookieSettings" data-track-action="Back to previous page">
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Go back to the page you were looking at
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</a>
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</div>
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<h1 class="heading-large">Cookies</h1>
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<p class="summary">
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Cookies are small files saved on your phone, tablet or computer when you visit a website.
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</p>
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<p>We use cookies to make GOV.UK Notify work and collect information about how you use our service.</p>
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<div class="cookie-settings__no-js">
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<h2 class="govuk-heading-s govuk-!-margin-top-6">Do you want to accept analytics cookies?</h2>
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<p>We use Javascript to set most of our cookies. Unfortunately Javascript is not running on your browser, so you cannot change your settings. You can try:</p>
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<ul class="govuk-list govuk-list--bullet">
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<li>reloading the page</li>
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<li>turning on Javascript in your browser</li>
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</ul>
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</div>
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<h2 class="heading-medium">Analytics cookies (optional)</h2>
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<div class="cookie-settings__form-wrapper">
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<form data-module="cookie-settings">
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<div class="govuk-form-group govuk-!-margin-top-6">
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<fieldset class="govuk-fieldset" aria-describedby="changed-name-hint">
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<legend class="govuk-fieldset__legend govuk-fieldset__legend--s">
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Do you want to accept analytics cookies?
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</legend>
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<div class="govuk-radios govuk-radios--inline">
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<div class="govuk-radios__item">
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<input class="govuk-radios__input" id="cookies-analytics-yes" name="cookies-analytics" type="radio" value="on">
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<label class="govuk-label govuk-radios__label" for="cookies-analytics-yes">
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Yes
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</label>
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</div>
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<div class="govuk-radios__item">
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<input class="govuk-radios__input" id="cookies-analytics-no" name="cookies-analytics" type="radio" value="off">
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<label class="govuk-label govuk-radios__label" for="cookies-analytics-no">
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No
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</label>
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</div>
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</div>
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</fieldset>
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</div>
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<button class="govuk-button" type="submit">Save cookie settings</button>
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</form>
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</div>`;
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document.body.innerHTML += cookiesPageContent;
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yesRadio = document.querySelector('#cookies-analytics-yes');
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noRadio = document.querySelector('#cookies-analytics-no');
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saveButton = document.querySelector('.govuk-button');
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});
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afterEach(() => {
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document.body.innerHTML = '';
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// remove cookie set by tests
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helpers.deleteCookie('cookies_policy');
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// reset spies
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window.ga.mockClear();
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window.GOVUK.initAnalytics.mockClear();
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// remove analytics tracker
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delete window.GOVUK.analytics;
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// reset global variable to state when init.js loaded
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window['ga-disable-UA-26179049-1'] = true;
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});
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/*
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Note: If no JS, the cookies page contains content to explain why JS is required to set analytics cookies.
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This is hidden if JS is available when the page loads.
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The message displayed to confirm any selection made is also in the page but hidden on load.
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Both of these work through CSS, based on the presence of the `js-enabled` class on the <body> so are not tested here.
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*/
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describe("When the page loads", () => {
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test("If user has not chosen to accept or reject analytics, the radios for making that choice should be set to unchecked", () => {
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window.GOVUK.modules.start();
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expect(yesRadio.checked).toBe(false);
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expect(noRadio.checked).toBe(false);
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});
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test("If analytics are accepted, the radio for 'accept analytics' should be set to checked", () => {
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window.GOVUK.setConsentCookie({ 'analytics': true });
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window.GOVUK.modules.start();
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expect(yesRadio.checked).toBe(true);
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expect(noRadio.checked).toBe(false);
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});
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test("If analytics are rejected, the radio for 'reject analytics' should be set to checked", () => {
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window.GOVUK.setConsentCookie({ 'analytics': false });
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window.GOVUK.modules.start();
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expect(yesRadio.checked).toBe(false);
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expect(noRadio.checked).toBe(true);
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});
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});
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describe("When the 'Save cookie settings' button is clicked", () => {
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beforeEach(() => {
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window.GOVUK.modules.start();
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});
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test("If no selection is made, set consent to reject analytics", () => {
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helpers.triggerEvent(saveButton, 'click');
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expect(window.GOVUK.getConsentCookie()).toEqual({ 'analytics': false });
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});
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test("If a selection is made, save this as consent", () => {
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yesRadio.checked = true;
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helpers.triggerEvent(saveButton, 'click');
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expect(window.GOVUK.getConsentCookie()).toEqual({ 'analytics': true });
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});
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describe("The message confirming your choice", () => {
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let confirmationMessage;
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beforeEach(() => {
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confirmationMessage = document.querySelector('.cookie-settings__confirmation');
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helpers.triggerEvent(saveButton, 'click');
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});
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test("Should be shown when the 'Save cookie settings' button is clicked", () => {
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expect(helpers.element(confirmationMessage).is('hidden')).toBe(false);
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});
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test("Should include a link to the last page visited, if information on the referrer is available", () => {
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jest.spyOn(document, 'referrer', 'get').mockReturnValue('https://notifications.service.gov.uk/privacy');
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helpers.triggerEvent(saveButton, 'click');
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expect(confirmationMessage.querySelector('.cookie-settings__prev-page').getAttribute('href')).toEqual('/privacy');
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});
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});
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describe("Analytics code", () => {
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beforeAll(() => {
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jest.spyOn(window, 'location', 'get').mockImplementation(() => {
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return {
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'pathname': '/privacy',
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'search': ''
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}
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});
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});
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test("if user accepted analytics, the analytics code should initialise and register a pageview", () => {
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window.GOVUK.modules.start();
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yesRadio.checked = true;
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helpers.triggerEvent(saveButton, 'click');
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expect(window.GOVUK.initAnalytics).toHaveBeenCalled();
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expect(window.ga).toHaveBeenCalled();
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// the first 4 calls are configuration
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expect(window.ga.mock.calls[4]).toEqual(['send', 'pageview', '/privacy']);
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});
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test("if user rejected analytics, the analytics code should not run", () => {
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window.GOVUK.modules.start();
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noRadio.checked = true;
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helpers.triggerEvent(saveButton, 'click');
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expect(window.GOVUK.initAnalytics).not.toHaveBeenCalled();
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});
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});
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});
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});
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