@Test
  public void createErrorHandlingInfraStructureTest() {

    PropertyEditorTextBox widget = GWT.create(PropertyEditorTextBox.class);
    PropertyEditorItemWidget itemWidget = GWT.create(PropertyEditorItemWidget.class);
    PropertyEditorItemsWidget parent = GWT.create(PropertyEditorItemsWidget.class);
    PropertyEditorErrorWidget errorWidget = GWT.create(PropertyEditorErrorWidget.class);

    PropertyEditorHelper.createErrorHandlingInfraStructure(parent, itemWidget, errorWidget, widget);
    verify(widget).setErrorWidget(errorWidget);
    verify(widget).setParent(parent);
    verify(itemWidget).add(widget);
  }