[mediasource-avtracks.html]
type: testharness
[Check that media tracks and their properties are populated properly]
expected: FAIL
[Media tracks must be removed when the SourceBuffer is removed from the MediaSource]
expected: FAIL
[Media tracks must be removed when the HTMLMediaElement.src is changed]
expected: FAIL
[Media tracks must be removed when HTMLMediaElement.load() is called]
expected: FAIL