browser_EventUtils_drag_and_drop.js

Enable keyboard shortcuts

/* Any copyright is dedicated to the Public Domain.

 * http://creativecommons.org/publicdomain/zero/1.0/ */

"use strict";

add_task(async function test_cancelled_drag() {

  const source = document.createElement("div");

  source.textContent = "Drag source";

  source.draggable = true;

  document.documentElement.appendChild(source);

  registerCleanupFunction(() => source.remove());

  let dragStarts = 0;

  let clicks = 0;

  source.addEventListener("dragstart", event => {

    event.preventDefault();

    dragStarts++;

});

  source.addEventListener("click", () => clicks++);

  await EventUtils.synthesizePlainDragAndDrop({

    srcElement: source,

    stepX: 9,

    stepY: 0,

    expectCancelDragStart: true,

});

  is(dragStarts, 1, "The drag was cancelled at dragstart");

  is(clicks, 1, "Cancelling the drag generated a click");

});