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