chromium/third_party/blink/web_tests/external/wpt/css/css-paint-api/setTransform-001.https.html

<!DOCTYPE html>
<title>setTransform with DOMMatrix behaves correctly</title>
<html class="reftest-wait">
<link rel="help" href="https://drafts.css-houdini.org/css-paint-api/">
<link rel="match" href="setTransform-ref.html">
<style>
.container {
  width: 200px;
  height: 200px;
}

#foo {
  background: paint(foo);
}
</style>
<script src="/common/reftest-wait.js"></script>
<script src="/common/worklet-reftest.js"></script>
<body>
<div id="foo" class="container"></div>

<script id="code" type="text/worklet">
registerPaint('foo', class {
    paint(ctx, geom) {
        ctx.fillStyle = 'green';
        let m = ctx.getTransform();
        m.a = 2;
        m.d = 2;
        ctx.setTransform(m);
        ctx.fillRect(0, 0, 50, 50);
    }
});
</script>

<script>
    importWorkletAndTerminateTestAfterAsyncPaint(CSS.paintWorklet, document.getElementById('code').textContent);
</script>
</body>
</html>