gitlab-org--gitlab-foss/spec/frontend/version_check_image_spec.js

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import $ from 'jquery';
import ClassSpecHelper from 'helpers/class_spec_helper';
import VersionCheckImage from '~/version_check_image';
describe('VersionCheckImage', () => {
let testContext;
beforeEach(() => {
testContext = {};
});
describe('bindErrorEvent', () => {
ClassSpecHelper.itShouldBeAStaticMethod(VersionCheckImage, 'bindErrorEvent');
beforeEach(() => {
testContext.imageElement = $('<div></div>');
});
it('registers an error event', () => {
jest.spyOn($.prototype, 'on').mockImplementation(() => {});
// eslint-disable-next-line func-names
jest.spyOn($.prototype, 'off').mockImplementation(function () {
return this;
});
VersionCheckImage.bindErrorEvent(testContext.imageElement);
expect($.prototype.off).toHaveBeenCalledWith('error');
expect($.prototype.on).toHaveBeenCalledWith('error', expect.any(Function));
});
it('hides the imageElement on error', () => {
jest.spyOn($.prototype, 'hide').mockImplementation(() => {});
VersionCheckImage.bindErrorEvent(testContext.imageElement);
testContext.imageElement.trigger('error');
expect($.prototype.hide).toHaveBeenCalled();
});
});
});