1 files changed, 44 insertions, 0 deletions
diff --git a/testing/web-platform/tests/animation-worklet/worklet-animation-set-keyframes.https.html b/testing/web-platform/tests/animation-worklet/worklet-animation-set-keyframes.https.html
new file mode 100644
index 0000000000..d3d02898db
--- /dev/null
+++ b/testing/web-platform/tests/animation-worklet/worklet-animation-set-keyframes.https.html
@@ -0,0 +1,44 @@
+<html class="reftest-wait">
+<title>Worklet Animation sets keyframes</title>
+<link rel="help" href="https://drafts.css-houdini.org/css-animationworklet/">
+<meta name="assert" content="Can update the keyframes for an effect while the animation is running">
+<link rel="match" href="references/translated-box-ref.html">
+
+<script src="/web-animations/testcommon.js"></script>
+<script src="/common/reftest-wait.js"></script>
+<script src="common.js"></script>
+
+<style>
+  #box {
+    width: 100px;
+    height: 100px;
+    background-color: green;
+  }
+</style>
+
+<div id="box"></div>
+
+<script>
+  registerConstantLocalTimeAnimator(500).then(()=>{
+    const keyframes_before = [
+      { transform: 'translateX(0)' },
+      { transform: 'translateX(200px)' }
+    ];
+    const keyframes_after = [
+      { transform: 'translateY(0)' },
+      { transform: 'translateY(200px)' }
+    ];
+
+    const box = document.getElementById('box');
+    const effect = new KeyframeEffect(box, keyframes_before, {duration: 1000});
+    const animation = new WorkletAnimation('constant_time', effect);
+    animation.play();
+
+    waitForAsyncAnimationFrames(1).then(_ => {
+      effect.setKeyframes(keyframes_after);
+      waitForAsyncAnimationFrames(1).then(_ => {
+        takeScreenshot();
+      });
+    });
+  });
+</script>
+\ No newline at end of file