### Question:
Refresher extends AbstractComponent implements NonUIComponent { public int getInterval() { return interval; } Refresher(); int getInterval(); void setInterval(int interval); HandlerRegistration addListener(final RefreshListener listener); @Override void paintContent(PaintTarget target); @Override void changeVariables(Object source, Map<String, Object> variables);  }### Answer:
@Test public void test_hasADefaultIntervalOfOneSecond() { assertEquals(1000, refresher.getInterval()); }