offset-and-scroll-sizes-should-match.html

<!DOCTYPE html>
<script src="../../resources/js-test.js"></script>
<style>
#block {
    width: 200.5px;
    height: 200.5px;
}
#inlineContainer {
    display: inline-block;
    width: 200px;
}
#inlineContainer > span {
    height: 30px;
    display: inline-block;
    width: calc(100% / 3);
}
</style>
<body>
<div id="block"></div>
<div id="inlineContainer">
  <span></span><span id="inline"></span>
</div>
<script>
var test;
function checkSizesAreEqual(id) {
    test = document.getElementById(id);
    shouldBeTrue("test.scrollWidth == test.offsetWidth");
    shouldBeTrue("test.scrollHeight == test.offsetHeight");
}

checkSizesAreEqual("block");
checkSizesAreEqual("inline");

</script>

chromium/third_party/blink/web_tests/fast/sub-pixel/offset-and-scroll-sizes-should-match.html