blob: c177d79b9e0b630c00da7d7edd696b15f690a518 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
|
import LazyLoader from '~/lazy_loader';
let lazyLoader = null;
describe('LazyLoader', function() {
preloadFixtures('issues/issue_with_comment.html.raw');
beforeEach(function() {
loadFixtures('issues/issue_with_comment.html.raw');
lazyLoader = new LazyLoader({
observerNode: 'body',
});
// Doing everything that happens normally in onload
lazyLoader.loadCheck();
});
describe('behavior', function() {
it('should copy value from data-src to src for img 1', function(done) {
const img = document.querySelectorAll('img[data-src]')[0];
const originalDataSrc = img.getAttribute('data-src');
img.scrollIntoView();
setTimeout(() => {
expect(img.getAttribute('src')).toBe(originalDataSrc);
expect(document.getElementsByClassName('js-lazy-loaded').length).toBeGreaterThan(0);
done();
}, 100);
});
it('should lazy load dynamically added data-src images', function(done) {
const newImg = document.createElement('img');
const testPath = '/img/testimg.png';
newImg.className = 'lazy';
newImg.setAttribute('data-src', testPath);
document.body.appendChild(newImg);
newImg.scrollIntoView();
setTimeout(() => {
expect(newImg.getAttribute('src')).toBe(testPath);
expect(document.getElementsByClassName('js-lazy-loaded').length).toBeGreaterThan(0);
done();
}, 100);
});
it('should not alter normal images', function(done) {
const newImg = document.createElement('img');
const testPath = '/img/testimg.png';
newImg.setAttribute('src', testPath);
document.body.appendChild(newImg);
newImg.scrollIntoView();
setTimeout(() => {
expect(newImg).not.toHaveClass('js-lazy-loaded');
done();
}, 100);
});
});
});
|
