chromium/third_party/blink/web_tests/fast/css-grid-layout/grid-item-bad-named-area-auto-placement.html

<!DOCTYPE html>
<html>
<link href="resources/grid.css" rel="stylesheet">
<style>
.grid {
    grid-template-rows: 10px 20px;
    grid-auto-rows: 5px;
    grid-template-columns: 30px 40px;
    grid-auto-columns: 15px;
    grid-auto-flow: row;
}

.bothNamedGridLineRow {
    grid-row: nonExistentArea / nonExistentArea;
    grid-column: 1;
    background-color: lime;
}

.bothNamedGridLineColumn {
    grid-row: 1;
    grid-column: nonExistentArea / span 3;
    background-color: lime;
}

.namedGridLineSpanRow {
    grid-row: nonExistentArea / span 5 firstRow;
    grid-column: 1;
    background-color: lime;
}

.namedGridLineSpanColumn {
    grid-row: 1;
    grid-column: nonExistentArea / span 1;
    background-color: lime;
}
</style>
<script src="../../resources/check-layout.js"></script>
<body onload="checkLayout('.grid')">

<p>This test checks that unknown named area are are resolved properly considering all the implicit grid lines to have the given names.</p>

<div style="position: relative">
    <div class="grid">
        <div class="sizedToGridArea firstRowFirstColumn" data-offset-x="0" data-offset-y="0" data-expected-width="30" data-expected-height="10"></div>
        <div class="sizedToGridArea bothNamedGridLineRow" data-offset-x="0" data-offset-y="35" data-expected-width="30" data-expected-height="5"></div>
    </div>
</div>

<div style="position: relative">
    <div class="grid">
        <div class="sizedToGridArea firstRowFirstColumn" data-offset-x="0" data-offset-y="0" data-expected-width="30" data-expected-height="10"></div>
        <div class="sizedToGridArea bothNamedGridLineColumn" data-offset-x="85" data-offset-y="0" data-expected-width="45" data-expected-height="10"></div>
    </div>
</div>

<div style="position: relative">
    <div class="grid">
        <div class="sizedToGridArea firstRowFirstColumn" data-offset-x="0" data-offset-y="0" data-expected-width="30" data-expected-height="10"></div>
        <div class="sizedToGridArea namedGridLineSpanRow" data-offset-x="0" data-offset-y="35" data-expected-width="30" data-expected-height="25"></div>
    </div>
</div>

<div style="position: relative">
    <div class="grid">
        <div class="sizedToGridArea firstRowFirstColumn" data-offset-x="0" data-offset-y="0" data-expected-width="30" data-expected-height="10"></div>
        <div class="sizedToGridArea namedGridLineSpanColumn" data-offset-x="85" data-offset-y="0" data-expected-width="15" data-expected-height="10"></div>
    </div>
</div>

</body>
</html>