test_removal_onload.html

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<html>

<!--

https://bugzilla.mozilla.org/show_bug.cgi?id=841579

-->

<head>

  <title>Test for Bug 841579</title>

  <script src="/tests/SimpleTest/SimpleTest.js"></script>

  <script src="/tests/SimpleTest/WindowSnapshot.js"></script>

  <script type="application/javascript" src="imgutils.js"></script>

  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />

</head>

<body>

<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=841579">Mozilla Bug 841579</a>

<p id="display"></p>

<div id="content">

</div>

<pre id="test">

<script type="application/javascript">

/** Test for Bug 841579**/

SimpleTest.requestFlakyTimeout("Early failure timeout");

SimpleTest.waitForExplicitFinish();

const FAILURE_TIMEOUT = 120000; // Fail early after 120 seconds (2 minutes)

const Cc = SpecialPowers.Cc;

const Ci = SpecialPowers.Ci;

const gContent = document.getElementById("content");

var gImg;

var gMyDecoderObserver;

var gIsTestFinished = false;

var gFiles;

var gNotifications = 0;

var gLoads = 0;

var gRemovals = 0;

var gExpected = 5;

function* fileToLoad() {

  yield "red.png";

  yield "invalid.jpg";

  yield "lime100x100.svg";

  yield "bad.jpg";

  yield "rillybad.jpg";

function onSizeAvailable() {

  ok(true, "AfterLoad.onSizeAvailable called for " + gImg.src);

function onLoadComplete() {

  ok(gExpected > gLoads, "AfterLoad.onLoadComplete called for " + gImg.src);

  gLoads++;

  SimpleTest.executeSoon(function() {

    try {

      gContent.removeChild(gImg);

    catch (e) {}

    gRemovals++;

    maybeAdvance();

});

function onDecodeComplete() {

  ok(true, "AfterLoad.onDecodeComplete called for " + gImg.src);

function failTest() {

  ok(false, "timing out after " + FAILURE_TIMEOUT + "ms.  " +

            "currently displaying " + gImg.src);

  cleanUpAndFinish();

function onNotification()

  gNotifications++;

  maybeAdvance();

function maybeAdvance()

  if (gRemovals != gNotifications) {

    return;

  let {done, value} = gFiles.next();

  if (done) {

    cleanUpAndFinish();

    return;

  gImg.src = value;

  gContent.appendChild(gImg);

function cleanUpAndFinish() {

  // On the off chance that failTest and myOnStopFrame are triggered

  // back-to-back, use a flag to prevent multiple calls to SimpleTest.finish.

  if (gIsTestFinished) {

    return;

  let imgLoadingContent = SpecialPowers.wrap(gImg);

  imgLoadingContent.removeObserver(gMyDecoderObserver);

  // TODO: this isn't the case until post-bug 716140's refactorings

  // ok(gNotifications == gLoads, "Should be notified the same number of times as loads");

  SimpleTest.finish();

  gIsTestFinished = true;

function main() {

  gFiles = fileToLoad();

  gImg = new Image();

  gImg.onload = onNotification;

  gImg.onerror = onNotification;

  // Create, customize & attach decoder observer

  var observer = new ImageDecoderObserverStub();

  observer.sizeAvailable = onSizeAvailable;

  observer.loadComplete = onLoadComplete;

  observer.decodeComplete = onDecodeComplete;

  gMyDecoderObserver =

    Cc["@mozilla.org/image/tools;1"].getService(Ci.imgITools)

      .createScriptedObserver(SpecialPowers.wrapCallbackObject(observer));

  let imgLoadingContent = SpecialPowers.wrap(gImg);

  imgLoadingContent.addObserver(gMyDecoderObserver);

  // We want to test the cold loading behavior, so clear cache in case an

  // earlier test got our image in there already.

  clearAllImageCaches();

  // kick off image-loading! myOnStopFrame handles the rest.

  gImg.setAttribute("src", gFiles.next());

  // In case something goes wrong, fail earlier than mochitest timeout,

  // and with more information.

  setTimeout(failTest, FAILURE_TIMEOUT);

window.onload = main;

</script>

</pre>

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