browser_animation_reconstructState.js

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/* Any copyright is dedicated to the Public Domain.

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

"use strict";

// Check that, even though the AnimationPlayerActor only sends the bits of its

// state that change, the front reconstructs the whole state everytime.

add_task(async function () {

  const { target, walker, animations } = await initAnimationsFrontForUrl(

    MAIN_DOMAIN + "animation.html"

);

  await playerHasCompleteStateAtAllTimes(walker, animations);

  await target.destroy();

  gBrowser.removeCurrentTab();

});

async function playerHasCompleteStateAtAllTimes(walker, animations) {

  const node = await walker.querySelector(walker.rootNode, ".simple-animation");

  const [player] = await animations.getAnimationPlayersForNode(node);

  // Get the list of state key names from the initialstate.

  const keys = Object.keys(player.initialState);

  // Get the state over and over again and check that the object returned

  // contains all keys.

  // Normally, only the currentTime will have changed in between 2 calls.

  for (let i = 0; i < 10; i++) {

    await player.refreshState();

    keys.forEach(key => {

      Assert.notStrictEqual(

        typeof player.state[key],

        "undefined",

        "The state retrieved has key " + key

);

});