Creating JUnit tests for new opearotrs

Hello,
I have the following simple TestOperator and MyIOObject.
I am trying to make JUnit tests for this operator.

TestOperator

public class TestOperator extends Operator {
        // input port
        protected InputPort inParam = getInputPorts().createPort("MyIOObject");

        // output port
        protected OutputPort outParam = getOutputPorts().createPort("MyIOObject");

	public TestOperator(OperatorDescription description) {
		super(description);
	}

	public void doWork() throws OperatorException {
                 // Read input
                 MyIOObject ioObj = inParam.getData();

                 // Increment value
                 ioObj.setValue( ioObj.getValue() + 1 );

                 // Deliver output
                 outParam.deliver(ioObj);
	}
}

IO object

public class MyIOObject  extends ResultObjectAdapter {
	private int value = -1;
        public void setValue(int value) {
            this.value = value;
        }

        public int getValue() {
            return this.value;
        }
}

My idea about JUnit test is such as follows:

public class CirclePixelsExtractorTest extends TestCase {

@Test
	public void testMeanValue() throws OperatorException {	
		// create operator
                // ??????????????????????????????????????????????????????
                // ???????????????????????? 1 ???????????????????????????
                // ??????????????????????????????????????????????????????
		OperatorDescription od = null; // (1) ??? HOW TO GET AN OperatorDescription ??;
		TestOperator ce = new TestOperator (od);

		// create IO input data
		MyIOObject  io = new MyIOObject();
		io.setValue(5);

		// provide IO data as an input

                // ??????????????????????????????????????????????????????
                // ???????????????????????? 2 ???????????????????????????
                // ??????????????????????????????????????????????????????
		ce.getInputPorts().getPortByIndex(0). // how to set Data ???;  

		// execute the operator
		ce.doWork();

		// read output
		MyIOObject io2 = ce.getOutputPorts().getPortByIndex(0).getData();
		int res = io2.getValue();

		// validate
		assertEquals(6, res);
	}
}

Please, could anyone help me with:
1) Is there any simple way how to create my operator object (TestOperator)? To use a constructor I am missing the OperatorDescription and its constructor seem to be quite complicated (requires additional classes).
2) How can I set the IO object (io) to the input port: ce.getInputPorts().getPortByIndex(0)

Thank you very much for any advice.

radone