full-viewport-repaint-for-background-attachment-fixed.html

<!DOCTYPE html>
<meta name=fuzzy content="0-2;0-1000000">
<style>
::-webkit-scrollbar { display: none; }
body {
    background-image: linear-gradient(red, blue);
    background-attachment: fixed;
}
</style>
<script src="../resources/text-based-repaint.js" type="text/javascript"></script>
<script>
if (window.testRunner)
    internals.settings.setPreferCompositingToLCDTextEnabled(false);

function repaintTest() {
    window.scrollTo(0, 1000);
}

window.onload = function() {
    runRepaintAndPixelTest();
};
</script>
<div style="height: 5000px">
Tests that scrolling a frame with background-attachment: fixed invalidates the entire viewport.
</div>

chromium/third_party/blink/web_tests/paint/invalidation/background/full-viewport-repaint-for-background-attachment-fixed.html