OverlayScrollbars/tests/instances.test.ts

import { addInstance, removeInstance, getInstance, allInstances } from 'instances';

const testElm = document.body;
const testInstance = { value: 'value' };

describe('instances', () => {
    afterEach(() => {
        removeInstance(testElm);
    });

    test('add instance', () => {
        addInstance(testElm, testInstance);

        expect(allInstances().size).toBe(1);
    });

    test('remove instance', () => {
        addInstance(testElm, testInstance);
        removeInstance(testElm);

        expect(allInstances().size).toBe(0);
    });

    test('get instance', () => {
        addInstance(testElm, testInstance);

        expect(getInstance(testElm)).toBe(testInstance);
    });
});