@splidejs/svelte-splide/utils/forOwn/test/forOwn.test.js

Svelte component for the Splide slider/carousel.

import { forOwn } from '../forOwn';
describe('forOwn', () => {
    test('can iterate an object by own enumerable properties.', () => {
        const object = { a: 1, b: 2, c: 3 };
        let counter = 0;
        forOwn(object, (value, key) => {
            counter++;
            expect(object[key]).toBe(value);
        });
        expect(counter).toBe(Object.keys(object).length);
    });
    test('should not handle inherited properties.', () => {
        class Constructor {
            constructor() {
                this.a = 1;
                this.b = 2;
            }
        }
        Constructor.prototype['c'] = 3;
        const object = {};
        forOwn(new Constructor(), (value, key) => {
            object[key] = value;
        });
        expect(object).toStrictEqual({ a: 1, b: 2 });
    });
});