css/css-grid/layout-algorithm/grid-as-flex-item-should-not-shrink-to-fit-003.html

<!DOCTYPE html>
<meta charset="utf-8">
<title>CSS Grid Layout Test: Evaluate the behavior of a grid container as Flexbox item</title>
<link rel="author" title="Javier Fernandez Garcia-Boente" href="mailto:jfernandez@igalia.com">
<link rel="help" href="https://drafts.csswg.org/css-grid/#layout-algorithm">
<link rel="help" href="https://drafts.csswg.org/css-flexbox-1/#flex-lines">
<link rel="help" href="https://drafts.csswg.org/css-flexbox-1/#propdef-flex-wrap">
<link rel="help" href="https://drafts.csswg.org/css-flexbox-1/#propdef-align-content">
<link rel="help" href="https://drafts.csswg.org/css-flexbox-1/#propdef-align-self">
<link rel="help" href="https://drafts.csswg.org/css-align-3/#align-flex">
<link rel="help" href="https://drafts.csswg.org/css-align-3/#align-grid">
<link rel="match" href="../../reference/ref-filled-green-100px-square.xht">
<meta name="assert" content="A single-line column flexbox shouldn't shrink-to-fit since its flex item is stretching in the main-axis, honoring the 'align-self: normal (behaves as 'stretch')'. The vertical grid item's inline-size should be stretched as well, honoring its justify-self: 'normal' (behaves as 'stretch')">
<style>
    body { overflow: hidden; }
    .flexbox {
        display: flex;
        flex-flow: column nowrap;
        align-content: flex-start;
        width: 100px;
        height: 100px;
        background: red;
    }
    .grid {
        display: grid;
        align-items: baseline;
    }
    .gridItem {
        background: green;
        height: 100px;
        writing-mode: vertical-lr;
    }
</style>
<p>Test passes if there is a filled green square and <strong>no red</strong>.</p>
<div class="flexbox">
    <div class="grid">
        <div class="gridItem"></div>
    </div>
</div>