gwt单元测试

   做个记号，用gwt-test-utils.jar写gwt单元测试

1. source code

 

public class SimpleComposite extends Composite {

   private Button button = new Button();
   private Label label = new Label();

   public SimpleComposite() {

      button.setHTML("display something");

      // The wrapper panel
      VerticalPanel vPanel = new VerticalPanel();
      vPanel.setWidth("100%");
      vPanel.setHorizontalAlignment(VerticalPanel.ALIGN_CENTER);
      vPanel.add(button);
      vPanel.add(label);

      // All composites must call initWidget() in their constructors.
      initWidget(vPanel);

      VerticalPanel dialogVPanel = new VerticalPanel();
      dialogVPanel.setWidth("100%");
      dialogVPanel.setHorizontalAlignment(VerticalPanel.ALIGN_CENTER);

      // Add click handlers to the button
      button.addClickHandler(new ClickHandler() {

         public void onClick(ClickEvent arg0) {
            label.setText("The button was clicked !");
         }
                        
      });
   }
}

 

2. Test code

 

public class SimpleCompositeTest extends AbstractGwtTest {

   // the tested composite
   private SimpleComposite composite;

   @Before
   public void init() throws Exception {
      // instanciate the composite
      composite = new SimpleComposite();
   }
        
   @Test
   public void checkClick() {
      // With this helper method, we can get private Widget in the composite
      Button button = GwtTestReflectionUtils.getPrivateFieldValue(composite, "button");
      Label label = GwtTestReflectionUtils.getPrivateFieldValue(composite, "label");
                
      // ensure label is empty
      Assert.assertEquals(null, label.getText());
                
      // simule the click event with AbstractGwtTest method
      Browser.click(button);
                
      // assert the label has been filled
      Assert.assertEquals("The button was clicked !", label.getText());
   }
}