This is a testharness.js-based test.
PASS The current time returns the hold time when set
PASS The current time is unresolved when there is no associated timeline (and no hold time is set)
FAIL The current time is unresolved when the start time is unresolved (and no hold time is set) assert_equals: expected (object) null but got (number) 142.56499999987682
PASS The current time is calculated from the timeline time, start time and playback rate
PASS The current time does not progress if playback rate is 0
Harness: the test ran to completion.

