1 files changed, 31 insertions, 0 deletions
diff --git a/dom/media/mediasource/test/test_LoadedMetadataFired.html b/dom/media/mediasource/test/test_LoadedMetadataFired.html
new file mode 100644
index 0000000000..68030dbe2f
--- /dev/null
+++ b/dom/media/mediasource/test/test_LoadedMetadataFired.html
@@ -0,0 +1,31 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <title>MSE: append initialization only</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <script type="text/javascript" src="mediasource.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+</head>
+<body>
+<pre id="test">
+<script class="testbody" type="text/javascript">
+
+SimpleTest.waitForExplicitFinish();
+
+runWithMSE(async (ms, v) => {
+  await once(ms, "sourceopen");
+  const sb = ms.addSourceBuffer("video/webm");
+
+  sb.appendBuffer(new Uint8Array(await fetchWithXHR("seek.webm"), 0, 318));
+  v.play();
+  await once(v, "loadedmetadata");
+  ok(true, "Got loadedmetadata event");
+  is(v.videoWidth, 320, "videoWidth has correct initial value");
+  is(v.videoHeight, 240, "videoHeight has correct initial value");
+  SimpleTest.finish();
+});
+
+</script>
+</pre>
+</body>
+</html>