The Tor Browser / file revision

 function test_seek10(v, seekTime, is, ok, finish) {

 // Test bug 523335 - ensure that if we close a stream while seeking, we

 // don't hang during shutdown. This test won't "fail" per se if it's regressed,

 // it will instead start to cause random hangs in the mochitest harness on

 // shutdown.

 function startTest() {

   // Must be duration*0.9 rather than seekTime, else we don't hit that problem.

   // This is probably due to the seek bisection finishing too quickly, before

   // we can close the stream.

   v.currentTime = v.duration * 0.9;

 }

 function done(evt) {

   ok(true, "We don't acutally test anything...");

   finish();

 }

 function seeking() {

   ok(v.currentTime >= seekTime - 0.1, "Video currentTime should be around " + seekTime + ": " + v.currentTime);

   v.onerror = done;

   v.src = "not a valid video file.";

   v.load(); // Cause the existing stream to close.

 }

 v.addEventListener("loadeddata", startTest, false);

 v.addEventListener("seeking", seeking, false);

 }