invalidate-when-receiving-paint-layer.html

<!doctype HTML>
<div style="will-change: transform; position: fixed"></div>
<div style="position: relative; border: 1px solid black;">  
  <div id="target" style="opacity: 1; height: 100px; width: 200px;">
    This text should be very light
  </div>
</div>
<script src="../../resources/run-after-layout-and-paint.js"></script>
<script>
if (window.testRunner)
    testRunner.waitUntilDone();
onload = function() {
    runAfterLayoutAndPaint(function() {
        target.style.opacity = 0.2;
        testRunner.notifyDone();
    });
}
</script>

chromium/third_party/blink/web_tests/paint/invalidation/invalidate-when-receiving-paint-layer.html