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17e4078da3
Differential Revision: https://phabricator.services.mozilla.com/D43351 --HG-- extra : moz-landing-system : lando
88 lines
2.2 KiB
HTML
88 lines
2.2 KiB
HTML
<!DOCTYPE HTML>
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<html>
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<!--
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https://bugzilla.mozilla.org/show_bug.cgi?id=478398
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-->
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<head>
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<title>Test for Bug 478398</title>
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<script src="/tests/SimpleTest/SimpleTest.js"></script>
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<script type="text/javascript" src="imgutils.js"></script>
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<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
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</head>
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<body>
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<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=478398">Mozilla Bug 478398</a>
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<pre id="test">
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<script class="testbody" type="text/javascript">
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/** Test for Bug 399925. **/
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var oldTimeoutPref;
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var oldDiscardPref;
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SimpleTest.waitForExplicitFinish();
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window.onload = stage1;
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var imageFilename = "bug478398_ONLY.png";
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function stage1()
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{
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// Get the current pref values
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oldTimeoutPref = getImagePref(DISCARD_TIMEOUT_PREF);
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oldDiscardPref = getImagePref(DISCARD_ENABLED_PREF);
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// We're testing discarding here
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setImagePref(DISCARD_ENABLED_PREF, true);
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// Sets the discard timer to 500 ms (max timeout = 2*500ms = 1s)
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setImagePref(DISCARD_TIMEOUT_PREF, 500);
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// Create the image _after_ setting the discard timer pref
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// This image was carefully constructed to make it a "big win" for discarding,
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// so any reasonable heuristic should still discard it.
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var image = new Image();
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image.setAttribute("id", "testimage");
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image.style.display = "none";
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image.src = imageFilename;
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// Put the image into the document
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document.body.appendChild(image);
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// Wait for load, then do stage2
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image.onload = stage2;
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}
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function stage2()
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{
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// Make sure we're loaded
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ok(isImageLoaded("testimage"), "image should be loaded");
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// We're loaded - force a synchronous decode
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forceDecode("testimage");
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// We should be decoded
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ok(isFrameDecoded("testimage"), "image should be decoded");
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// Wait 1.5 seconds, then finish the test
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setTimeout(function() {
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finishTest();;
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}, 1500);
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}
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function finishTest()
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{
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// The image should be discarded by now
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ok(!isFrameDecoded("testimage"), "image should have been discarded!");
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// Reset the prefs
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setImagePref(DISCARD_TIMEOUT_PREF, oldTimeoutPref);
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setImagePref(DISCARD_ENABLED_PREF, oldDiscardPref);
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// Finish the test
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SimpleTest.finish();
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}
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</script>
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</pre>
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</body>
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</html>
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