WidgetPatcher.java

package com.googlecode.gwt.test.internal.patchers;

import com.google.gwt.user.client.ui.Widget;
import com.googlecode.gwt.test.finder.GwtFinder;
import com.googlecode.gwt.test.patchers.InitMethod;
import com.googlecode.gwt.test.patchers.PatchClass;
import javassist.CannotCompileException;
import javassist.CtClass;
import javassist.CtMethod;
import javassist.NotFoundException;

@PatchClass(Widget.class)
class WidgetPatcher {

    @InitMethod
    static void initClass(CtClass c) throws CannotCompileException, NotFoundException {

        // add behavior to Widget.onAttach method
        CtMethod onAttach = c.getMethod("onAttach", "()V");
        onAttach.insertBefore(GwtFinder.class.getName() + ".onAttach(this);");

        // add behavior to RadioButton.setName method
        CtMethod onDetach = c.getMethod("onDetach", "()V");
        onDetach.insertBefore(GwtFinder.class.getName() + ".onDetach(this);");
    }

}