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Rocket.Chat/apps/meteor/tests/unit/app/ui-utils/client.tests.ts

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/* eslint-env mocha */
import { expect } from 'chai';
import { JSDOM } from 'jsdom';
import { waitForElement } from '../../../../client/lib/utils/waitForElement';
describe('waitUntilWrapperExists', () => {
const globalDocument = global.document;
const mutationObserver = global.MutationObserver;
beforeEach(() => {
const dom = new JSDOM(
`<html>
<body>
<span class="ready" />
</body>
</html>`,
{ url: 'http://localhost' },
);
global.document = dom.window.document;
global.MutationObserver = dom.window.MutationObserver;
});
afterEach(() => {
global.document = globalDocument;
global.MutationObserver = mutationObserver;
});
it('should return the element when it is already in the dom', async () => {
expect(await waitForElement('.ready')).to.be.equal(document.querySelector('.ready'));
});
it('should await until the element be in the dom and return it', async () => {
setTimeout(() => {
const element = document.createElement('div');
element.setAttribute('class', 'not-ready');
document.body.appendChild(element);
}, 5);
expect(await waitForElement('.not-ready')).to.be.equal(document.querySelector('.not-ready'));
});
});