docshell/test/test_bug669671.html

   1 <!DOCTYPE HTML>
   2 <html>
   3 <!--
   4 https://bugzilla.mozilla.org/show_bug.cgi?id=669671
   5 -->
   6 <head>
   7   <title>Test for Bug 669671</title>
   8   <script type="application/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
   9   <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
  10 </head>
  11 <body>
  12 <a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=669671">Mozilla Bug 669671</a>
  13 <p id="display"></p>
  14 <div id="content" style="display: none">
  15
  16 </div>
  17 <pre id="test">
  18 <script type="application/javascript;version=1.7">
  19
  20 /**
  21  * Test for Bug 669671.
  22  *
  23  * This is a bit complicated.  We have a script, file_bug669671.sjs, which counts
  24  * how many times it's loaded and returns that count in the body of an HTML
  25  * document.  For brevity, call this page X.
  26  *
  27  * X is sent with Cache-Control: max-age=0 and can't be bfcached (it has an
  28  * onunload handler).  Our test does the following in a popup:
  29  *
  30  * 1) Load X?pushed, to prime the cache.
  31  * 2) Navigate to X.
  32  * 3) Call pushState and navigate from X to X?pushed.
  33  * 4) Navigate to X?navigated.
  34  * 5) Go back (to X?pushed).
  35  *
  36  * We do all this work so we can check that in step 5, we fetch X?pushed from
  37  * the network -- we shouldn't use our cached copy, because of the
  38  * cache-control header X sends.
  39  *
  40  * Then we go back and repeat the whole process but call history.replaceState
  41  * instead of pushState.  And for good measure, we test once more, this time
  42  * modifying only the hash of the URI using replaceState.  In this case, we
  43  * *should* load from the cache.
  44  *
  45  **/
  46 SimpleTest.waitForExplicitFinish();
  47
  48 function onChildLoad()
  49 {
  50   SimpleTest.executeSoon(function() { gGen.next() });
  51 }
  52
  53 var _loadCount = 0;
  54 function checkPopupLoadCount()
  55 {
  56   is(popup.document.body.innerHTML, _loadCount + '', 'Load count');
  57
  58   // We normally want to increment _loadCount here.  But if the test fails
  59   // because we didn't do a load we should have, let's not cause a cascade of
  60   // failures by incrementing _loadCount.
  61   var origCount = _loadCount;
  62   if (popup.document.body.innerHTML >= _loadCount + '')
  63     _loadCount++;
  64   return origCount;
  65 }
  66
  67 function test()
  68 {
  69   // Step 0 - Make sure the count is reset to 0 in case of reload
  70   popup.location = 'file_bug669671.sjs?countreset';
  71   yield;
  72   is(popup.document.body.innerHTML, '0',
  73      'Load count should be reset to 0');
  74
  75   // Step 1 - The popup's body counts how many times we've requested the
  76   // resource.  This is the first time we've requested it, so it should be '0'.
  77   checkPopupLoadCount();
  78
  79   // Step 2 - We'll get another onChildLoad when this finishes.
  80   popup.location = 'file_bug669671.sjs';
  81   yield undefined;
  82
  83   // Step 3 - Call pushState and change the URI back to ?pushed.
  84   checkPopupLoadCount();
  85   popup.history.pushState('', '', '?pushed');
  86
  87   // Step 4 - Navigate away.  This should trigger another onChildLoad.
  88   popup.location = 'file_bug669671.sjs?navigated-1';
  89   yield undefined;
  90
  91   // Step 5 - Go back.  This should result in another onload (because the file is
  92   // not in bfcache) and should be the fourth time we've requested the sjs file.
  93   checkPopupLoadCount();
  94   SpecialPowers.wrap(popup).back();
  95   yield undefined;
  96
  97   // This is the check which was failing before we fixed the bug.
  98   checkPopupLoadCount();
  99
 100   popup.close();
 101
 102   // Do the whole thing again, but with replaceState.
 103   popup = window.open('file_bug669671.sjs?replaced');
 104   yield undefined;
 105   checkPopupLoadCount();
 106   popup.location = 'file_bug669671.sjs';
 107   yield undefined;
 108   checkPopupLoadCount();
 109   popup.history.replaceState('', '', '?replaced');
 110   popup.location = 'file_bug669671.sjs?navigated-2';
 111   yield undefined;
 112   checkPopupLoadCount();
 113   SpecialPowers.wrap(popup).back();
 114   yield undefined;
 115   checkPopupLoadCount();
 116   popup.close();
 117
 118   // Once more, with feeling.  Notice that we don't have to prime the cache
 119   // with an extra load here, because X and X#hash share the same cache entry.
 120   popup = window.open('file_bug669671.sjs?hash-test');
 121   yield undefined;
 122   var initialCount = checkPopupLoadCount();
 123   popup.history.replaceState('', '', '#hash');
 124   popup.location = 'file_bug669671.sjs?navigated-3';
 125   yield undefined;
 126   checkPopupLoadCount();
 127   SpecialPowers.wrap(popup).back();
 128   yield undefined;
 129   is(popup.document.body.innerHTML, initialCount + '',
 130      'Load count (should be cached)');
 131   popup.close();
 132
 133   SimpleTest.finish();
 134   yield undefined;
 135 }
 136
 137 // This will call into onChildLoad once it loads.
 138 var popup = window.open('file_bug669671.sjs?pushed');
 139
 140 var gGen = test();
 141
 142 </script>
 143 </pre>
 144 </body>
 145 </html>