chromium/third_party/blink/web_tests/fast/css-grid-layout/grid-element-padding-margin.html

<!DOCTYPE html>
<html>
<link href="resources/grid.css" rel="stylesheet">
<style>
.grid {
    grid-template-columns: 100px;
    grid-template-rows: 50px;
    /* Force the grid element to be shrink-to-fit. */
    position: absolute;
}

.padding {
    padding: 20px 10px 30px 50px;
}

.border {
    border-style: solid;
    border-color: green;
    border-width: 10px 20px 30px 40px;
}
</style>
<script src="../../resources/check-layout.js"></script>
<body onload="checkLayout('.grid')">

<p>Test that paddings and borders are added to a grid element's size.</p>

<div class="grid padding" data-expected-height="100" data-expected-width="160"></div>
<div class="grid padding verticalRL" data-expected-height="150" data-expected-width="110"></div>
<div class="grid border" data-expected-height="90" data-expected-width="160"></div>
<div class="grid border verticalRL" data-expected-height="140" data-expected-width="110"></div>
<div class="grid border padding" data-expected-height="140" data-expected-width="220"></div>
<div class="grid border padding verticalRL" data-expected-height="190" data-expected-width="170"></div>

</body>
</html>