We should test whether the 'hasMediaSessionWithActiveMediaElementsDidChange' callback gets called when expected.
<rdar://problem/21746768>
(In reply to comment #0) > We should test whether the 'hasMediaSessionWithActiveMediaElementsDidChange' > callback gets called when expected. Typically, tests are added at the same time as the feature/bug they test.
This was filed against the old MediaSession spec.