| TEST(source.addSourceBuffer("invalid")) THROWS(DOMException.NOT_SUPPORTED_ERR) OK | |
| EXPECTED (MediaSource.isTypeSupported("invalid") == 'false') OK | |
| EXPECTED (MediaSource.isTypeSupported("video/mock; codecs=mock") == 'true') OK | |
| RUN(video.src = URL.createObjectURL(source)) | |
| EVENT(sourceopen) | |
| RUN(sourceBuffer = source.addSourceBuffer("video/mock; codecs=mock")) | |
| EXPECTED (source.sourceBuffers[0] == '[object SourceBuffer]') OK | |
| END OF TEST | |