import { EventHandlerReconciler } from "https://deno.land/x/dom_diff/reconcilers/event_handler.ts";
import { assertEquals } from "https://deno.land/std/testing/asserts.ts";
declare const listener: () => {};
const reconciler = new EventHandlerReconciler();
const oldNode = document.createElement("button");
const newNode = document.createElement("button");

newNode.onclick = listener;

const patches = reconciler.diff(oldNode, newNode);
for (const patch of patches) reconciler.update(oldNode, patch);

assertEquals(oldNode.onclick, listener);