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<!DOCTYPE html>
<html>
<meta charset="utf-8">
<title>
Test for Bug 1630819: Test we don't reframe the html element when
inserting a block element into a display:table body element.
</title>
<link rel="author" title="Ting-Yu Lin" href="mailto:tlin@mozilla.com">
<link rel="author" title="Mozilla" href="http://www.mozilla.org/">
<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
<script src="/tests/SimpleTest/SimpleTest.js"></script>
<script>
SimpleTest.waitForExplicitFinish();
const utils = SpecialPowers.getDOMWindowUtils(window);
function runTest() {
document.documentElement.offsetTop;
const frameCountBeforeReframe = utils.framesConstructed;
// We expect to construct one newly appended block, and reconstruct the
// display:table <body>, which consists of 8 frames including TableWrapper,
// Table, TableRowGroup, TableRow, TableColGroup, TableCol, TableCell, and
// TableCell's inner block.
const expectedFrameConstructionCount = 1 + 8;
let div = document.createElement("div");
document.body.appendChild(div);
document.documentElement.offsetTop;
is(utils.framesConstructed - frameCountBeforeReframe,
expectedFrameConstructionCount,
"We shouldn't reframe <html> when appending a <div> into a display:table <body>!");
SimpleTest.finish();
}
</script>
<style>
body {
display: table;
}
</style>
<body onload="runTest();"></body>
</html>
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