scroll-padlock/test/unit/debounce.spec.js

Locks elements scroll handling scrollbar gaps and iOS Safari with CSS variables

import 'jsdom-global/register.js';

import { expect } from 'chai';

import debounce from '../../src/debounce.js';

describe('debounce', () => {
    it('should be able to make a debounced function off a given function', async () => {
        let calls = 0;

        const fn = debounce(() => (calls++));

        // This call won't be detected because of debounce
        fn();

        // This call will be detected
        fn();

        expect(calls).to.equals(0);
        
        await new Promise(window.setTimeout);

        expect(calls).to.equals(1);

        // This call won't be detected because of debounce
        fn();

        // This will be detected
        fn();

        expect(calls).to.equals(1);
        
        await new Promise(window.setTimeout);

        expect(calls).to.equals(2);
    });
});