svelte/test/runtime/samples/event-handler-this-methods/_config.js

export default {
	test ( assert, component, target, window ) {
		// Click events don't focus elements in JSDOM – obviously they would
		// in real browsers. More realistically, you'd use this for e.g.
		// this.select(), but that's harder to test than this.focus()

		const wont = target.querySelector( '.wont-focus' );
		const will = target.querySelector( '.will-focus' );

		wont.dispatchEvent( new window.MouseEvent( 'click' ) );
		assert.equal( window.document.activeElement, window.document.body );

		will.dispatchEvent( new window.MouseEvent( 'click' ) );
		assert.equal( window.document.activeElement, will );
	}
};