模拟tuple对象是StormStarter项目的一个很好的解决方案。很简单：

package storm.starter.tools;

import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.when;
import backtype.storm.Constants;
import backtype.storm.tuple.Tuple;

public final class MockTupleHelpers {

    private MockTupleHelpers() {
    }

    public static Tuple mockTickTuple() {
        return mockTuple(Constants.SYSTEM_COMPONENT_ID, Constants.SYSTEM_TICK_STREAM_ID);
    }

    public static Tuple mockTuple(String componentId, String streamId) {
        Tuple tuple = mock(Tuple.class);
        when(tuple.getSourceComponent()).thenReturn(componentId);
        when(tuple.getSourceStreamId()).thenReturn(streamId);
        return tuple;
    }
}