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+<!DOCTYPE HTML>
+<html>
+<head>
+ <meta charset="utf-8">
+ <title>Test cloneElementVisually</title>
+ <script src="/tests/SimpleTest/SimpleTest.js"></script>
+ <script type="application/javascript" src="https://example.com:443/tests/dom/media/test/cloneElementVisually_helpers.js"></script>
+ <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css">
+</head>
+<body>
+<div id="content">
+ <h1>Original</h1>
+ <video id="original"></video>
+ <h1>MediaStream</h1>
+ <video id="streamTarget"></video>
+ <h1>Clone</h1>
+</div>
+<div id="results">
+ <h1>Results</h1>
+ <canvas id="left"></canvas>
+ <canvas id="right"></canvas>
+</div>
+
+<script type="application/javascript">
+
+/* import-globals-from cloneElementVisually_helpers.js */
+
+/**
+ * Tests that cloning survives changes to the underlying video resource.
+ */
+add_task(async () => {
+ await setup();
+
+ let originalVideo = document.getElementById("original");
+ originalVideo.setAttribute("loop", true);
+ await originalVideo.play();
+
+ await withNewClone(originalVideo, async clone => {
+ SpecialPowers.wrap(originalVideo).cloneElementVisually(clone);
+
+ await waitForEventOnce(originalVideo, "timeupdate");
+
+ originalVideo.pause();
+ await waitForEventOnce(originalVideo, "pause");
+
+ ok(await assertVideosMatch(originalVideo, clone),
+ "Initial video should match.");
+
+ await setVideoSrc(originalVideo, TEST_VIDEO_2);
+
+ await originalVideo.play();
+ await waitForEventOnce(originalVideo, "timeupdate");
+
+ originalVideo.pause();
+ await waitForEventOnce(originalVideo, "pause");
+
+ ok(await assertVideosMatch(originalVideo, clone),
+ "New video should match.");
+ });
+
+ await setVideoSrc(originalVideo, TEST_VIDEO_1);
+});
+
+</script>
+
+</body>
+</html>