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
|
import { isSticky } from '~/lib/utils/sticky';
describe('sticky', () => {
const el = {
offsetTop: 0,
classList: {},
};
beforeEach(() => {
el.offsetTop = 0;
el.classList.add = jasmine.createSpy('spy');
el.classList.remove = jasmine.createSpy('spy');
});
describe('classList.remove', () => {
it('does not call classList.remove when stuck', () => {
isSticky(el, 0, 0);
expect(
el.classList.remove,
).not.toHaveBeenCalled();
});
it('calls classList.remove when not stuck', () => {
el.offsetTop = 10;
isSticky(el, 0, 0);
expect(
el.classList.remove,
).toHaveBeenCalledWith('is-stuck');
});
});
describe('classList.add', () => {
it('calls classList.add when stuck', () => {
isSticky(el, 0, 0);
expect(
el.classList.add,
).toHaveBeenCalledWith('is-stuck');
});
it('does not call classList.add when not stuck', () => {
el.offsetTop = 10;
isSticky(el, 0, 0);
expect(
el.classList.add,
).not.toHaveBeenCalled();
});
});
});
|
