chromium/third_party/blink/web_tests/fast/text-autosizing/unwrappable-inlines.html

<!DOCTYPE html>
<html>
<head>

<meta name="viewport" content="width=800">
<style>
html { font-size: 16px; }
body { width: 800px; margin: 0; overflow-y: hidden; }
pre { margin: 0; }
</style>

<script src="resources/autosizingTest.js"></script>

</head>
<body>

<div>
<span style="white-space: pre">
    This text is expected be autosized to 40px computed font-size (16 * 800/320), since Text Autosizing is not yet smart enough to detect that all the children of this div are unwrappable. Ideally it would not get autosized.
</span>
</div>

<div>
<span style="white-space: nowrap">
    This text is expected be autosized to 40px computed font-size (16 * 800/320), since Text Autosizing is not yet smart enough to detect that all the children of this div are unwrappable. Ideally it would not get autosized.
</span>
</div>

<div>
<span style="white-space: pre-wrap">
    This text should be autosized to 40px computed font-size (16 * 800/320) since it has white-space:pre-wrap which allows text wrapping (even though it doesn't collapse white space).
</span>
</div>

<div>
<span>
    This text should be autosized to 40px computed font-size (16 * 800/320).
</span>
</div>

</body>
</html>