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<!-- Copyright © 2016 Chromium authors and World Wide Web Consortium, (Massachusetts Institute of Technology, ERCIM, Keio University, Beihang). -->
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    <head>
        <title>MediaSource.removeSourceBuffer() test cases.</title>
        <script src="/resources/testharness.js"></script>
        <script src="/resources/testharnessreport.js"></script>
        <script src="mediasource-util.js"></script>
    </head>
    <body>
        <div id="log"></div>
        <script>
          mediasource_test(function(test, mediaElement, mediaSource)
          {
              var sourceBuffer = mediaSource.addSourceBuffer(MediaSourceUtil.AUDIO_VIDEO_TYPE);
              assert_class_string(sourceBuffer, "SourceBuffer", "New SourceBuffer returned");

              mediaSource.removeSourceBuffer(sourceBuffer);

              var sourceBuffer2 = mediaSource.addSourceBuffer(MediaSourceUtil.AUDIO_VIDEO_TYPE);
              assert_class_string(sourceBuffer2, "SourceBuffer", "New SourceBuffer returned");
              assert_not_equals(sourceBuffer, sourceBuffer2, "SourceBuffers are different instances.");
              assert_equals(mediaSource.sourceBuffers.length, 1, "sourceBuffers.length == 1");

              test.done();
          }, "Test addSourceBuffer(), removeSourceBuffer(), addSourceBuffer() sequence.");

          mediasource_test(function(test, mediaElement, mediaSource)
          {
              assert_throws_js(TypeError,
                          function() { mediaSource.removeSourceBuffer(null); },
                          "removeSourceBuffer() threw an exception when passed null.");
              test.done();
          }, "Test removeSourceBuffer() with null");

          mediasource_test(function(test, mediaElement, mediaSource)
          {
              var sourceBuffer = mediaSource.addSourceBuffer(MediaSourceUtil.AUDIO_VIDEO_TYPE);
              assert_class_string(sourceBuffer, "SourceBuffer", "New SourceBuffer returned");

              mediaSource.removeSourceBuffer(sourceBuffer);

              assert_throws_dom("NotFoundError",
                  function() { mediaSource.removeSourceBuffer(sourceBuffer); },
                  "removeSourceBuffer() threw an exception for a SourceBuffer that was already removed.");

              test.done();
          }, "Test calling removeSourceBuffer() twice with the same object.");

          mediasource_test(function(test, mediaElement1, mediaSource1)
          {
              var sourceBuffer1 = mediaSource1.addSourceBuffer(MediaSourceUtil.AUDIO_ONLY_TYPE);
              assert_class_string(sourceBuffer1, "SourceBuffer", "New SourceBuffer returned");

              var mediaElement2 = document.createElement("video");
              document.body.appendChild(mediaElement2);
              test.add_cleanup(function() { document.body.removeChild(mediaElement2); });

              var mediaSource2 = new MediaSource();
              var mediaSource2URL = URL.createObjectURL(mediaSource2);
              mediaElement2.src = mediaSource2URL;
              test.expectEvent(mediaSource2, "sourceopen", "Second MediaSource opened");
              test.waitForExpectedEvents(function()
              {
                  URL.revokeObjectURL(mediaSource2URL);

                  var sourceBuffer2 = mediaSource2.addSourceBuffer(MediaSourceUtil.VIDEO_ONLY_TYPE);
                  assert_class_string(sourceBuffer2, "SourceBuffer", "Second new SourceBuffer returned");
                  assert_not_equals(mediaSource1, mediaSource2, "MediaSources are different instances");
                  assert_not_equals(sourceBuffer1, sourceBuffer2, "SourceBuffers are different instances");
                  assert_equals(mediaSource1.sourceBuffers[0], sourceBuffer1);
                  assert_equals(mediaSource2.sourceBuffers[0], sourceBuffer2);
                  assert_throws_dom("NotFoundError",
                      function() { mediaSource1.removeSourceBuffer(sourceBuffer2); },
                      "MediaSource1.removeSourceBuffer() threw an exception for SourceBuffer2");
                  assert_throws_dom("NotFoundError",
                      function() { mediaSource2.removeSourceBuffer(sourceBuffer1); },
                      "MediaSource2.removeSourceBuffer() threw an exception for SourceBuffer1");
                  mediaSource1.removeSourceBuffer(sourceBuffer1);
                  mediaSource2.removeSourceBuffer(sourceBuffer2);
                  test.done();
              });
          }, "Test calling removeSourceBuffer() for a sourceBuffer belonging to a different mediaSource instance.");

          mediasource_test(function(test, mediaElement, mediaSource)
          {
              var sourceBuffer = mediaSource.addSourceBuffer(MediaSourceUtil.AUDIO_VIDEO_TYPE);
              assert_class_string(sourceBuffer, "SourceBuffer", "New SourceBuffer returned");

              mediaSource.endOfStream();
              assert_equals(mediaSource.readyState, "ended", "MediaSource in ended state");
              mediaSource.removeSourceBuffer(sourceBuffer);

              assert_equals(mediaSource.sourceBuffers.length, 0, "MediaSource.sourceBuffers is empty");
              assert_equals(mediaSource.activeSourceBuffers.length, 0, "MediaSource.activesourceBuffers is empty");

              test.done();
          }, "Test calling removeSourceBuffer() in ended state.");

          mediasource_testafterdataloaded(function(test, mediaElement, mediaSource, segmentInfo, sourceBuffer, mediaData)
          {
              var initSegment = MediaSourceUtil.extractSegmentData(mediaData, segmentInfo.init);

              test.expectEvent(sourceBuffer, "updateend", "initSegment append ended.");
              test.expectEvent(mediaElement, "loadedmetadata", "loadedmetadata done.");
              sourceBuffer.appendBuffer(initSegment);

              test.waitForExpectedEvents(function()
              {
                  assert_equals(mediaSource.sourceBuffers.length, 1, "MediaSource.sourceBuffers is not empty");
                  assert_equals(mediaSource.activeSourceBuffers.length, 1, "MediaSource.activesourceBuffers is not empty");
                  assert_equals(mediaElement.readyState, mediaElement.HAVE_METADATA);
                  assert_equals(mediaSource.duration, segmentInfo.duration);
                  test.expectEvent(mediaSource.activeSourceBuffers, "removesourcebuffer", "SourceBuffer removed from activeSourceBuffers.");
                  test.expectEvent(mediaSource.sourceBuffers, "removesourcebuffer", "SourceBuffer removed.");
                  mediaSource.removeSourceBuffer(sourceBuffer);
              });

              test.waitForExpectedEvents(function()
              {
                  assert_equals(mediaSource.sourceBuffers.length, 0, "MediaSource.sourceBuffers is empty");
                  assert_equals(mediaSource.activeSourceBuffers.length, 0, "MediaSource.activesourceBuffers is empty");
                  test.done();
              });
          }, "Test removesourcebuffer event on activeSourceBuffers.");

          mediasource_test(function(test, mediaElement, mediaSource)
          {
              mediaElement.addEventListener('error', test.unreached_func("Unexpected event 'error'"));
              var mimetype = MediaSourceUtil.AUDIO_VIDEO_TYPE;
              var sourceBuffer = mediaSource.addSourceBuffer(mimetype);
              sourceBuffer.appendBuffer(new Uint8Array(0));
              assert_true(sourceBuffer.updating, "Updating flag set when a buffer is appended.");
              test.expectEvent(sourceBuffer, 'abort');
              test.expectEvent(sourceBuffer, 'updateend');

              mediaSource.removeSourceBuffer(sourceBuffer);
              assert_false(sourceBuffer.updating, "Updating flag reset after abort.");
              test.waitForExpectedEvents(function()
              {
                  test.done();
              });
          }, "Test abort event when removeSourceBuffer() called while SourceBuffer is updating");
        </script>
    </body>
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