public class MyClass(){

   private Logger logger;

   @Override
   public void prepare(Map map, TopologyContext topologyContext, OutputCollector outputCollector) {
     this.collector = outputCollector;
     logger = LoggerFactory.getLogger(MyClass.class);
   }

    @Override
    public void execute(Tuple tuple) {
        if (TupleHelpers.isTickTuple(tuple)) {
            logger.info("Received tick tuple, triggering emit of current window counts");
        emitCurrentWindowAvgs();

        } else {

             ...
        }
    }
}

@RunWith(MockitoJUnitRunner.class)
public class MyClassTest {

 @Mock
 private Logger logger;

 @InjectMock
 private MyClass myclass;

 @Test
 public void myTest(){
      Tuple tickTuple = MockTupleHelpers.mockTickTuple();
      Myclass myclass = new MyClass();

    // when
    myClass.execute(tickTuple);

    // then
    // verifyZeroInteractions(collector);
    verify(collector).emit(any(Values.class));
}

logger = LoggerFactory.getLogger(IntermediateStatisticsBolt.class);

public MyClass(Logger logger) {
      this.logger = logger;
 }

@Mock private Logger mockLogger;

 private MyClass myObj; // class under test

 @Before setUp() {
      myObj = new MyClass(mockLogger);
 }

@InjectMock
  private MyClass myclass

Myclass myclass = new MyClass();

public class MyClass(){

  public MyClass() {
    this(LoggerFactory.getLogger(IntermediateStatisticsBolt.class));
  }

  MyClass(Logger logger) { this.logger = logger; }

logger = LoggerFactory.getLogger(IntermediateStatisticsBolt.class);

new IntermediateStatisticsBolt(logger); // i.e. a mock or real logger