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Bug 870022 - Add test for dom.image.picture.enabled. r=bz

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This commit is contained in:
John Schoenick 2014-06-04 15:04:40 -07:00
parent 7294da484b
commit 5414ff1aad
2 changed files with 91 additions and 0 deletions
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1
dom/tests/mochitest/general/mochitest.ini
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@ -51,6 +51,7 @@ skip-if = (buildapp == 'b2g' && toolkit != 'gonk') #Bug 931116, b2g desktop spec
[test_outerHTML.html]
[test_outerHTML.xhtml]
[test_paste_selection.html]
[test_picture_pref.html]
[test_resource_timing.html]
skip-if = buildapp == 'b2g' # b2g(No clipboard) b2g-debug(No clipboard) b2g-desktop(No clipboard)
[test_performance_now.html]

90
dom/tests/mochitest/general/test_picture_pref.html Normal file
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@ -0,0 +1,90 @@
<!DOCTYPE HTML>
<html>
<!--
https://bugzilla.mozilla.org/show_bug.cgi?id=870022
-->
<head>
<title>Test for dom.image.picture.enabled (Bug 870022)</title>
<script type="application/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
</head>
<body onload="runTest()">
<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=870022">Mozilla Bug 870022</a>
<!-- Tests that the picture pref is off pending bug 1017875, accounting
for dom.images.srcset.enabled being flipped on in the mean time. -->
<!-- these should all load red.png (naturalWidth 1) not big.png (natural
width 3000) regardless of dom.images.srcset.enabled being on or off -->
<picture>
<source srcset="http://example.com/tests/image/test/mochitest/big.png">
<img id="img1" src="http://example.com/tests/image/test/mochitest/red.png">
</picture>
<picture>
<source srcset="http://example.com/tests/image/test/mochitest/big.png 500w"
sizes="500w">
<img id="img2"
src="http://example.com/tests/image/test/mochitest/red.png"
srcset="http://example.com/tests/image/test/mochitest/big.png 500w"
sizes="50px">
</picture>
<!-- Should load red.png with srcset on, otherwise nothing -->
<img id="img-srcset-only"
srcset="http://example.com/tests/image/test/mochitest/big.png 500w, http://example.com/tests/image/test/mochitest/red.png 1x"
sizes="50px">
<!-- Should not load regardless of srcset pref -->
<img id="img-never"
srcset="http://example.com/tests/image/test/mochitest/big.png 500w"
sizes="50px">
<script type="application/javascript">
const srcsetPref = 'dom.image.srcset.enabled';
const picturePref = 'dom.image.picture.enabled';
SimpleTest.waitForExplicitFinish();
var srcsetEnabled = SpecialPowers.getBoolPref(srcsetPref);
var pictureEnabled = SpecialPowers.getBoolPref(picturePref);
is(pictureEnabled, false, "picture should be disabled pending bug 1017875");
function runTest() {
var img = document.querySelector("img");
var source = document.querySelector("source");
is(img.sizes, undefined, "sizes should not be visible on <img>");
is(source.sizes, undefined, "sizes should not be visible on <source>");
is(source.srcset, undefined, "srcset should not be visible on <source>");
var imgSizesDesc = Object.getOwnPropertyDescriptor(HTMLImageElement.prototype, "sizes");
var sourceSizesDesc = Object.getOwnPropertyDescriptor(HTMLSourceElement.prototype, "sizes");
var sourceSrcsetDesc = Object.getOwnPropertyDescriptor(HTMLSourceElement.prototype, "srcset");
is(imgSizesDesc, undefined, "HTMLImageElement should know nothing of sizes");
is(sourceSizesDesc, undefined, "HTMLSourceElement should know nothing of sizes");
is(sourceSrcsetDesc, undefined, "HTMLSourceElement should know nothing of srcset");
// Make sure the test images loaded red.png, which is 1x1, not big.png
for (var id of [ 'img1', 'img2' ]) {
var testImg = document.getElementById(id);
is(testImg.naturalWidth, 1, "Image should have loaded small source");
}
var srcsetOnlyImg = document.getElementById("img-srcset-only");
is(srcsetOnlyImg.naturalWidth, srcsetEnabled ? 1 : 0,
"srcset image should only load if srcset is enabled, and never the computed width candidate");
var neverImg = document.getElementById("img-never");
is(neverImg.naturalWidth, 0, "Image should not have loaded");
SimpleTest.finish();
}
</script>
</body>
</html>