This test sets the left property on the box below. It will only have reproducible output when run in the test system

*** Starting test.
Transitions should not be suspended: PASS
*** Setting left property to 100px. We should see transition events.
Transition ended on element with id: box
*** Suspending Animations/Transitions
Transitions should be suspended: PASS
*** Setting left property to 200px. We should NOT see transition events.
*** Resuming Animations/Transitions
Transitions should not be suspended: PASS
*** Test finished