CUBA Platform. Developer's Manual
5.7.3. Testing

Unit tests can be created and run both at the Middleware and the Client tiers. The platform includes JUnit and JMockit frameworks for this purpose.

Let us assume you have the following screen controller:

public class OrderEditor extends AbstractEditor {

    @Named("itemsTable.add")
    protected AddAction addAction;

    @Override
    public void init(Map<String, Object> params) {
        addAction.setWindowId("sales$Product.lookup");
        addAction.setHandler(new Lookup.Handler() {
            @Override
            public void handleLookup(Collection items) {
                // some code
            }
        });
    }
}

You can write the following test checking the init() method:

public class OrderEditorTest {

    OrderEditor editor;

    @Mocked
    Window.Editor frame;

    @Mocked
    AddAction addAction;

    @Before
    public void setUp() throws Exception {
        editor = new OrderEditor();
        editor.setWrappedFrame(frame);
        editor.addAction = addAction;
    }

    @Test
    public void testInit() {
        editor.init(Collections.<String, Object>emptyMap());
        editor.setItem(new Order());

        new Verifications() {
            {
                addAction.setWindowId("sales$Product.lookup");
                addAction.setHandler(withInstanceOf(Window.Lookup.Handler.class));
            }
        };
    }
}