Tests animation events with a negative delay.

PASS: animation1: Start event: elapsedTime=0
PASS: animation1: End event: elapsedTime=0.1
PASS: animation2: Start event: elapsedTime=0.05
PASS: animation2: End event: elapsedTime=0.1
PASS: animation3: Start event: elapsedTime=0.15
PASS: animation3: End event: elapsedTime=0.1