index.spec.js

import { createElement } from 'lwc';
import Test from 'x/test';
import { jasmine } from '../../../helpers/jasmine.js';

describe('event.composedPath() of event dispatched from closed shadow root', () => {
    it('should have shadowed elements when invoked inside the shadow root', () => {
        const elm = createElement('x-test', { is: Test });
        document.body.appendChild(elm);

        return Promise.resolve().then(() => {
            elm.clickShadowedButton();

            expect(elm.getShadowedComposedPath()).toEqual([
                jasmine.any(HTMLElement), // button
                jasmine.any(Object), // #shadow-root(closed)
                elm.child,
                elm.shadowRoot,
                elm,
                document.body,
                document.documentElement,
                document,
                window,
            ]);
        });
    });

    it('should not have shadowed elements when invoked outside the shadow root', () => {
        const elm = createElement('x-test', { is: Test });
        document.body.appendChild(elm);

        return Promise.resolve().then(() => {
            elm.clickShadowedButton();

            expect(elm.getComposedPath()).toEqual([
                elm.child,
                elm.shadowRoot,
                elm,
                document.body,
                document.documentElement,
                document,
                window,
            ]);
        });
    });
});