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<!DOCTYPE html>
<html>
<meta charset="utf-8">
<title>
Test for Bug 1503420: Test we don't reframe multi-column containing block
when appending a block containing a spanner kid.
</title>
<link rel="author" title="Ting-Yu Lin" href="mailto:tlin@mozilla.com">
<link rel="author" title="Mozilla" href="http://www.mozilla.org/">
<script src="/tests/SimpleTest/SimpleTest.js"></script>
<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
<script>
SimpleTest.waitForExplicitFinish();
const utils = SpecialPowers.getDOMWindowUtils(window);
function appendBlock() {
// Create a subtree like the following, and append it to columns.
// <div>
// <h3>spanner</h3>
// block2
// </div>
var spanner = document.createElement("h3");
var spannerText = document.createTextNode("spanner");
spanner.appendChild(spannerText);
var block2 = document.createElement("div");
var block2Text = document.createTextNode("block2");
block2.appendChild(spanner);
block2.appendChild(block2Text)
var column = document.getElementById("column");
column.appendChild(block2);
}
function runTest() {
document.documentElement.offsetTop;
// We expected to construct 6 more frames.
// 1) Block frame for <div>
// 2) Block frame for <h3>
// 3) Text frame for "spanner"
// 4) Text frame for "block2"
// 5) Column-span wrapper for <h3>, which is a sibling of <div>
// 6) Column-span wrapper for 5), which is a sibling of <article>
// Note: creating a continuation frame doesn't increase the count.
const expectedFrameConstructCount = utils.framesConstructed + 6;
appendBlock();
document.documentElement.offsetTop;
is(utils.framesConstructed, expectedFrameConstructCount,
"We shouldn't construct unexpected frames.");
SimpleTest.finish();
}
</script>
<style>
#column {
column-count: 3;
column-rule: 6px solid;
width: 400px;
outline: 1px solid black;
}
h3 {
column-span: all;
outline: 1px solid blue;
}
</style>
<body onload="runTest();">
<article id="column">
<div>block1</div>
</article>
</body>
</html>
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