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+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=1022913
+-->
+<head>
+  <meta charset="utf-8">
+  <title>Test for Bug 1022913</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+  <script type="text/javascript" src="manifest.js"></script>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1022913">Mozilla Bug 1022913</a>
+<p id="display"></p>
+<div id="content" style="display: none">
+
+</div>
+<pre id="test">
+</pre>
+  <script type="application/javascript">
+
+    // Test that if we're doing a fastSeek() forwards that we don't end up
+    // seeking backwards. This can happen if the keyframe before the seek
+    // target is before the current playback position. We'd prefer to seek to
+    // the keyframe after the seek target in this case, but we don't implement
+    // this yet (bug 1026330).
+    var manager = new MediaTestManager;
+
+    var onSecondSeekComplete = function(event) {
+      var v = event.target;
+      v.removeEventListener("seeked", onSecondSeekComplete);
+      ok(v.currentTime >= v.firstSeekTarget, v.name + " seek never go backwards. time=" + v.currentTime + " firstSeekTarget=" + v.firstSeekTarget + " secondSeekTarget=" + v.secondSeekTarget);
+      manager.finished(v.token);
+      removeNodeAndSource(v);
+    };
+
+    var onFirstSeekComplete = function(event) {
+      var v = event.target;
+      v.removeEventListener("seeked", onFirstSeekComplete);
+      // Seek to 75% of the way between the start and the first keyframe
+      // using fastSeek. We then test that the currentTime doesn't drop back
+      // to the previous keyframe, currentTime should go forwards.
+      v.addEventListener("seeked", onSecondSeekComplete);
+      v.secondSeekTarget = v.keyframes[1] * 0.75;
+      v.fastSeek(v.secondSeekTarget);
+    }
+
+    var onLoadedMetadata = function(event) {
+      // Seek to the mid-point between the start and the first keyframe.
+      var v = event.target;
+      v.removeEventListener("loadedmetadata", onLoadedMetadata);
+      v.addEventListener("seeked", onFirstSeekComplete);
+      v.firstSeekTarget = v.keyframes[1] * 0.5;
+      v.currentTime = v.firstSeekTarget;
+    }
+
+    function startTest(test, token) {
+      manager.started(token);
+      let v = document.createElement("video");
+      v.src = test.name;
+      v.name = test.name;
+      v.preload = "metadata";
+      v.token = token;
+      v.target = 0;
+      v.keyframes = test.keyframes;
+      v.keyframeIndex = 0;
+      ok(v.keyframes.length >= 2, v.name + " - video should have at least two sync points");
+      v.addEventListener("loadedmetadata", onLoadedMetadata);
+      document.body.appendChild(v);
+    }
+
+    manager.runTests(gFastSeekTests, startTest);
+
+  </script>
+</body>
+</html>