test_bug669671.html

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<!--

https://bugzilla.mozilla.org/show_bug.cgi?id=669671

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<head>

  <title>Test for Bug 669671</title>

  <script src="/tests/SimpleTest/SimpleTest.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=669671">Mozilla Bug 669671</a>

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

<div id="content" style="display: none">

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<pre id="test">

<script type="application/javascript">

/**

 * Test for Bug 669671.

 * This is a bit complicated.  We have a script, file_bug669671.sjs, which counts

 * how many times it's loaded and returns that count in the body of an HTML

 * document.  For brevity, call this page X.

 * X is sent with Cache-Control: max-age=0 and can't be bfcached (it has an

 * onunload handler).  Our test does the following in a popup:

 * 1) Load X?pushed, to prime the cache.

 * 2) Navigate to X.

 * 3) Call pushState and navigate from X to X?pushed.

 * 4) Navigate to X?navigated.

 * 5) Go back (to X?pushed).

 * We do all this work so we can check that in step 5, we fetch X?pushed from

 * the network -- we shouldn't use our cached copy, because of the

 * cache-control header X sends.

 * Then we go back and repeat the whole process but call history.replaceState

 * instead of pushState.  And for good measure, we test once more, this time

 * modifying only the hash of the URI using replaceState.  In this case, we

 * should* load from the cache.

*/

SimpleTest.requestLongerTimeout(2);

SimpleTest.waitForExplicitFinish();

function onChildLoad() {

  SimpleTest.executeSoon(function() { gGen.next(); });

var _loadCount = 0;

function checkPopupLoadCount() {

  is(popup.document.body.innerHTML, _loadCount + "", "Load count");

  // We normally want to increment _loadCount here.  But if the test fails

  // because we didn't do a load we should have, let's not cause a cascade of

  // failures by incrementing _loadCount.

  var origCount = _loadCount;

  if (popup.document.body.innerHTML >= _loadCount + "")

    _loadCount++;

  return origCount;

function* test() {

  // Step 0 - Make sure the count is reset to 0 in case of reload

  popup.location = "file_bug669671.sjs?countreset";

  yield;

  is(popup.document.body.innerHTML, "0",

     "Load count should be reset to 0");

  // Step 1 - The popup's body counts how many times we've requested the

  // resource.  This is the first time we've requested it, so it should be '0'.

  checkPopupLoadCount();

  // Step 2 - We'll get another onChildLoad when this finishes.

  popup.location = "file_bug669671.sjs";

  yield undefined;

  // Step 3 - Call pushState and change the URI back to ?pushed.

  checkPopupLoadCount();

  popup.history.pushState("", "", "?pushed");

  // Step 4 - Navigate away.  This should trigger another onChildLoad.

  popup.location = "file_bug669671.sjs?navigated-1";

  yield undefined;

  // Step 5 - Go back.  This should result in another onload (because the file is

  // not in bfcache) and should be the fourth time we've requested the sjs file.

  checkPopupLoadCount();

  popup.history.back();

  yield undefined;

  // This is the check which was failing before we fixed the bug.

  checkPopupLoadCount();

  popup.close();

  // Do the whole thing again, but with replaceState.

  popup = window.open("file_bug669671.sjs?replaced");

  yield undefined;

  checkPopupLoadCount();

  popup.location = "file_bug669671.sjs";

  yield undefined;

  checkPopupLoadCount();

  popup.history.replaceState("", "", "?replaced");

  popup.location = "file_bug669671.sjs?navigated-2";

  yield undefined;

  checkPopupLoadCount();

  popup.history.back();

  yield undefined;

  checkPopupLoadCount();

  popup.close();

  // Once more, with feeling.  Notice that we don't have to prime the cache

  // with an extra load here, because X and X#hash share the same cache entry.

  popup = window.open("file_bug669671.sjs?hash-test");

  yield undefined;

  var initialCount = checkPopupLoadCount();

  popup.history.replaceState("", "", "#hash");

  popup.location = "file_bug669671.sjs?navigated-3";

  yield undefined;

  checkPopupLoadCount();

  popup.history.back();

  yield undefined;

  is(popup.document.body.innerHTML, initialCount + "",

     "Load count (should be cached)");

  popup.close();

  SimpleTest.finish();

var gGen = test();

var popup;

// Disable RCWN to make cache behavior deterministic.

SpecialPowers.pushPrefEnv({set: [["network.http.rcwn.enabled", false]]}, () => {

  // This will call into onChildLoad once it loads.

  popup = window.open("file_bug669671.sjs?pushed");

});

</script>

</pre>

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