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+<!DOCTYPE html>
+<html><head>
+<meta http-equiv="content-type" content="text/html; charset=windows-1252">
+  <title>MSE: |waiting| event when source data is missing</title>
+  <script type="text/javascript" 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(function(ms, el) {
+  once(ms, 'sourceopen').then(function() {
+    ok(true, "Receive a sourceopen event");
+    var sb = ms.addSourceBuffer("video/webm");
+    fetchWithXHR("seek.webm", function(arrayBuffer) {
+      sb.addEventListener('error', (e) => { ok(false, "Got Error: " + e); SimpleTest.finish(); });
+      loadSegment.bind(null, sb, new Uint8Array(arrayBuffer, 0, 318))()
+      .then(loadSegment.bind(null, sb, new Uint8Array(arrayBuffer, 318, 25223-318)))
+      .then(loadSegment.bind(null, sb, new Uint8Array(arrayBuffer, 25223, 46712-25223)))
+      /* Note - Missing |46712, 67833 - 46712| segment here */
+      .then(loadSegment.bind(null, sb, new Uint8Array(arrayBuffer, 67833, 88966 - 67833)))
+      .then(loadSegment.bind(null, sb, new Uint8Array(arrayBuffer, 88966)))
+      .then(function() {
+        // HTMLMediaElement fires 'waiting' if somebody invokes |play()| before the MDSM
+        // has notified it of available data. Make sure that we get 'playing' before
+        // we starting waiting for 'waiting'.
+        info("Invoking play()");
+        var p = once(el, 'playing');
+        el.play();
+        return p;
+      }).then(function() {
+        ok(true, "Video playing. It should play for a bit, then fire 'waiting'");
+        var p = once(el, 'waiting');
+        el.play();
+        return p;
+      }).then(function() {
+        // currentTime is based on the current video frame, so if the audio ends just before
+        // the next video frame, currentTime can be up to 1 frame's worth earlier than
+        // min(audioEnd, videoEnd).
+        // 0.0465 is the length of the last audio frame.
+        ok(el.currentTime >= (sb.buffered.end(0) - 0.0465),
+           "Got a waiting event at " + el.currentTime);
+        info("Loading more data");
+        var p = once(el, 'ended');
+        loadSegment(sb, new Uint8Array(arrayBuffer, 46712, 67833 - 46712)).then(() => ms.endOfStream());
+        return p;
+      }).then(function() {
+        // These fuzz factors are bigger than they should be. We should investigate
+        // and fix them in bug 1137574.
+        isfuzzy(el.duration, 4.001, 0.1, "Video has correct duration: " + el.duration);
+        isfuzzy(el.currentTime, el.duration, 0.1, "Video has correct currentTime.");
+        SimpleTest.finish();
+      });
+    });
+  });
+});
+</script>
+</pre>
+</body>
+</html>