source: class RollingCountBoltTest {
  
  	private static final String ANY_NON_SYSTEM_COMPONENT_ID;
  	private static final String ANY_NON_SYSTEM_STREAM_ID;
  
  	@Test
  	public void shouldDeclareOutputFields() {
  
target: 		// given
  		OutputFieldsDeclarer declarer = mock(OutputFieldsDeclarer.class);
  		RollingCountBolt bolt = new RollingCountBolt();
  
  		// when
  		bolt.declareOutputFields(declarer);
  
  		// then
  		verify(declarer, times(1)).declare(any(Fields.class));
  
  	}
  
  }