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Moonchild
61 lines
2.2 KiB
HTML
61 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=870021
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-->
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<head>
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<title>Test for dom.image.srcset.enabled (Bug 870021)</title>
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<script type="application/javascript" src="/tests/SimpleTest/SimpleTest.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 onload="setupTest()">
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<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=870021">Mozilla Bug 870021</a>
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<div id="imgContainer">
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<img src="http://example.com/tests/image/test/mochitest/blue.png"
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srcset="http://example.com/tests/image/test/mochitest/big.png">
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</div>
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<script type="application/javascript">
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const srcsetPref = 'dom.image.srcset.enabled';
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SimpleTest.waitForExplicitFinish();
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is(SpecialPowers.getBoolPref(srcsetPref), true, "srcset should be enabled by default");
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function setupTest() {
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// Ensure that disabling the pref works as expected
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SpecialPowers.pushPrefEnv({'set': [[ "dom.image.srcset.enabled", false ]] }, function() {
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var container = document.querySelector("#imgContainer");
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// We want to re-create the element with the pref disabled to ensure
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// webIDL attributes are not attached
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container.innerHTML = container.innerHTML + " ";
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var img = container.querySelector("img");
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img.addEventListener("load", function imgLoad() {
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img.removeEventListener("load", imgLoad);
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runTest();
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});
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});
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}
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function runTest() {
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var img = document.querySelector("img");
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is(img.currentSrc, undefined, "currentSrc should not be visible");
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is(img.srcset, undefined, "srcset should not be visible");
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var currentSrcDesc = Object.getOwnPropertyDescriptor(HTMLImageElement.prototype, "currentSrc");
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var srcsetDesc = Object.getOwnPropertyDescriptor(HTMLImageElement.prototype, "srcset");
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is(currentSrcDesc, undefined, "HTMLImageElement should know nothing of currentSrc");
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is(srcsetDesc, undefined, "HTMLImageElement should know nothing of srcset");
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// Make sure the test image loaded the src image, which is 1x1, not the srcset image
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is(img.naturalWidth, 1, "Image should have loaded small source");
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SimpleTest.finish();
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}
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</script>
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</body>
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</html>
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