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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
<link rel="stylesheet" type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css"/>
<style>
.test {
margin: 1em;
font: 13px monospace;
width: 16ch;
}
.cols {
columns: 3;
}
</style>
</head>
<body>
<div class="test"><span id="test1">one two three four five six seven</span></div>
<div class="test"><div id="test2">one two three four five six seven</div></div>
<div class="test cols"><div id="test3">one two three four five six seven</div></div>
<div class="test"><div id="test4" class="cols">one two three four five six seven</div></div>
<script>
const TEST_DATA = [
{
description: "Test line counts of a non-block element returns null",
testElem: "test1",
lineCounts: null,
},
{
description: "Test line count of a non-fragmented block",
testElem: "test2",
lineCounts: [3],
},
{
description: "Test line counts of a block that is fragmented across columns",
testElem: "test3",
lineCounts: [3, 3, 1],
},
{
description: "Test line counts when columns are specified directly on the block",
testElem: "test4",
lineCounts: [3, 3, 1],
},
];
function check(a, b) {
if (a === null) {
return b === null;
}
if (a.length !== b.length) {
return false;
}
for (let i = 0; i < a.length; i++) {
if (a[i] !== b[i]) {
return false;
}
}
return true;
}
function run_tests() {
for (const { description, testElem, lineCounts } of TEST_DATA) {
info(description);
let target = document.getElementById(testElem);
let counts = InspectorUtils.getBlockLineCounts(target);
ok(check(counts, lineCounts), "got expected line counts");
}
SimpleTest.finish();
}
SimpleTest.waitForExplicitFinish();
window.requestAnimationFrame(run_tests);
</script>
</body>
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