Topic: Java JUnit Testing

I'm having problems getting some unit tests to pass. Help will be greatly appreciated! Here is the code:

==============================================================

import com.fasterxml.jackson.databind.node.ObjectNode;

public interface HelloWorld{

public ObjectNode StartHelloWorld(ObjectNode tbd); public ObjectNode ContinueHelloWorld(ObjectNode tbd); public Boolean EndHelloWorld(ObjectNode tbd);

}

====================================================

import com.fasterxml.jackson.databind.node.ObjectNode; import org.springframework.stereotype.Component;

@Component public class HelloWorldImplementation implements HelloWorld{

@Override public ObjectNode StartHelloWorld(ObjectNode tbd){ throw new UnsupportedOperationException("Not supported yet."); }

@Override public ObjectNode ContinueHelloWorld(ObjectNode tbd){ throw new UnsupportedOperationException("Not supported yet."); }

@Override public Boolean EndHelloWorld(ObjectNode tbd){ throw new UnsupportedOperationException("Not supported yet."); } }

====================================================

Below is what I have so far but it keeps failing. Also, I haven't come up with an idea to even check the third implemented method that is a boolean. All the methods at the moment only throw Exceptions and that's all they are supposed to do for now. If someone can show me how to have all three pass with a brief explanation so I can understand unit testing better, it would be appreciated. Thanks in advance!

-MV

//The test code I have written so far that doesn't work

@RunWith(MockitoJUnitRunner.class) public class HelloWorldTest{

@Rule public ExpectedException thrown= ExpectedException.none();

@InjectMocks private HelloWorldImplementation hwi;

@Test(expected=Exception.class) public void TestStartHelloWorld() throws Exception{ thrown.expect(UnsupportedOperationException.class); throw.expectMessage("Not supported yet."); }

}