private void verifyStartState(TimerEvent timerEvent) {
    Assert.assertEquals(State.START, timerEvent.getState());
    Assert.assertEquals(Duration.ZERO, timerEvent.getDuration());
    Assert.assertEquals(Duration.ZERO, timerEvent.getElapsed());
  }
Verifies that the {@code timerEvent}'s state is {@link State#START}.

@param timerEvent the {@link TimerEvent} to verify
jib-core/src/test/java/com/google/cloud/tools/jib/builder/TimerEventDispatcherTest.java