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Part 2: Add a web-platform-test to check computed margin values on au…
…to margin blocks. bugzilla-url: https://bugzilla.mozilla.org/show_bug.cgi?id=1471894 gecko-commit: bce3c6ca2e19a87381564a4a3cae0c0896482159 gecko-integration-branch: autoland gecko-reviewers: dholbert
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<!DOCTYPE html> | ||
<html> | ||
<head> | ||
<title>CSS Test: getComputedStyle on blocks with auto margins</title> | ||
<link rel="author" title="Brad Werth" href="mailto:bwerth@mozilla.com"> | ||
<link rel="help" href="https://drafts.csswg.org/cssom/#dom-window-getcomputedstyle" /> | ||
<meta name="assert" content="getComputedStyle produces pixel values for margin: auto blocks"> | ||
<script src="/resources/testharness.js" type="text/javascript"></script> | ||
<script src="/resources/testharnessreport.js" type="text/javascript"></script> | ||
<style> | ||
x { | ||
display: block; | ||
position: relative; | ||
background: grey; | ||
width: 60px; | ||
height: 10px; | ||
} | ||
y { | ||
display: block; | ||
background: blue; | ||
width: 40px; | ||
height: 10px; | ||
margin: auto; | ||
} | ||
|
||
#absolute { | ||
position: absolute; | ||
left: 0; | ||
right: 0; | ||
} | ||
#relative { | ||
position: relative; | ||
} | ||
</style> | ||
</head> | ||
<body> | ||
<div id="log"></div> | ||
<x><y id="absolute"></y></x> | ||
<x><y id="relative"></y></x> | ||
<script type="text/javascript"> | ||
let idsToTest = [ | ||
"absolute", | ||
"relative", | ||
]; | ||
|
||
for (let id of idsToTest) { | ||
let elem = document.getElementById(id); | ||
let elemStyle = window.getComputedStyle(elem); | ||
|
||
test(function() { | ||
assert_equals(elemStyle.getPropertyValue("margin-left"), "10px"); | ||
assert_equals(elemStyle.getPropertyValue("margin-right"), "10px"); | ||
}, id + "_computed_margins", { | ||
assert: id + "-positioned element's auto margins should be resolved to 10px." | ||
}); | ||
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||
test(function() { | ||
assert_equals(elemStyle.getPropertyValue("left"), "0px"); | ||
assert_equals(elemStyle.getPropertyValue("right"), "0px"); | ||
}, id + "_computed_left_and_right", { | ||
assert: id + "-positioned element should have a left and right of 0px (as authored)." | ||
}); | ||
} | ||
</script> | ||
</body> | ||
</html> |