debian-mirror-gitlab/spec/frontend/lib/utils/sticky_spec.js

78 lines
1.7 KiB
JavaScript
Raw Normal View History

2020-05-24 23:13:21 +05:30
import { setHTMLFixture } from 'helpers/fixtures';
2020-10-24 23:57:45 +05:30
import { isSticky } from '~/lib/utils/sticky';
2020-05-24 23:13:21 +05:30
const TEST_OFFSET_TOP = 500;
2017-09-10 17:25:29 +05:30
describe('sticky', () => {
2018-03-17 18:26:18 +05:30
let el;
2020-05-24 23:13:21 +05:30
let offsetTop;
2017-09-10 17:25:29 +05:30
beforeEach(() => {
2020-05-24 23:13:21 +05:30
setHTMLFixture(
`
2018-03-17 18:26:18 +05:30
<div class="parent">
<div id="js-sticky"></div>
</div>
2020-05-24 23:13:21 +05:30
`,
);
2018-03-17 18:26:18 +05:30
2020-05-24 23:13:21 +05:30
offsetTop = TEST_OFFSET_TOP;
2018-03-17 18:26:18 +05:30
el = document.getElementById('js-sticky');
2020-05-24 23:13:21 +05:30
Object.defineProperty(el, 'offsetTop', {
get() {
return offsetTop;
},
});
2017-09-10 17:25:29 +05:30
});
2018-03-17 18:26:18 +05:30
afterEach(() => {
2020-05-24 23:13:21 +05:30
el = null;
2018-03-17 18:26:18 +05:30
});
describe('when stuck', () => {
it('does not remove is-stuck class', () => {
isSticky(el, 0, el.offsetTop);
isSticky(el, 0, el.offsetTop);
2017-09-10 17:25:29 +05:30
2018-12-13 13:39:08 +05:30
expect(el.classList.contains('is-stuck')).toBeTruthy();
2017-09-10 17:25:29 +05:30
});
2018-03-17 18:26:18 +05:30
it('adds is-stuck class', () => {
isSticky(el, 0, el.offsetTop);
2017-09-10 17:25:29 +05:30
2018-12-13 13:39:08 +05:30
expect(el.classList.contains('is-stuck')).toBeTruthy();
2018-03-17 18:26:18 +05:30
});
it('inserts placeholder element', () => {
isSticky(el, 0, el.offsetTop, true);
2018-12-13 13:39:08 +05:30
expect(document.querySelector('.sticky-placeholder')).not.toBeNull();
2017-09-10 17:25:29 +05:30
});
});
2018-03-17 18:26:18 +05:30
describe('when not stuck', () => {
it('removes is-stuck class', () => {
2020-05-24 23:13:21 +05:30
jest.spyOn(el.classList, 'remove');
2018-03-17 18:26:18 +05:30
isSticky(el, 0, el.offsetTop);
2017-09-10 17:25:29 +05:30
isSticky(el, 0, 0);
2018-12-13 13:39:08 +05:30
expect(el.classList.remove).toHaveBeenCalledWith('is-stuck');
2020-05-24 23:13:21 +05:30
expect(el.classList.contains('is-stuck')).toBe(false);
2017-09-10 17:25:29 +05:30
});
2018-03-17 18:26:18 +05:30
it('does not add is-stuck class', () => {
2017-09-10 17:25:29 +05:30
isSticky(el, 0, 0);
2018-12-13 13:39:08 +05:30
expect(el.classList.contains('is-stuck')).toBeFalsy();
2018-03-17 18:26:18 +05:30
});
it('removes placeholder', () => {
isSticky(el, 0, el.offsetTop, true);
isSticky(el, 0, 0, true);
2018-12-13 13:39:08 +05:30
expect(document.querySelector('.sticky-placeholder')).toBeNull();
2017-09-10 17:25:29 +05:30
});
});
});