PASS Test SourceBuffer.abort() call during a pending appendStream().
PASS Test SourceBuffer.appendStream() triggering an 'ended' to 'open' transition.
PASS Test MediaSource.removeSourceBuffer() call during a pending appendStream().
+PASS Test setting MediaSource.duration during a pending appendStream() for one of its SourceBuffers.
+PASS Test MediaSource.endOfStream() during a pending appendStream() for one of its SourceBuffers.
PASS Test setting SourceBuffer.timestampOffset during a pending appendStream().
PASS Test appending a Stream with maxSize equal to 0.
PASS Test appending a Stream with maxSize value less than the size of the XHR response.