Patch the GXT {@link WidgetComponent#setParent(Widget, Widget) } method for gwt-test-utls-gxt

WidgetComponentPatcher.java

package com.octo.gxt.test.internal.patchers;

import com.extjs.gxt.ui.client.widget.WidgetComponent;
import com.google.gwt.user.client.ui.Widget;
import com.octo.gwt.test.patchers.PatchClass;
import com.octo.gwt.test.patchers.PatchMethod;
import com.octo.gwt.test.utils.GwtReflectionUtils;

/**
 * Patch the GXT {@link WidgetComponent#setParent(Widget, Widget) } method.
 * Usage that caused error:
 * <p>
 * <pre>
 * final FormPanel panel = new FormPanel();
 * panel.add(new Image(Resources.ICONS.formIcon()));
 * </pre>
 * </p>
 * @author Matthew Edwards
 * @see com.extjs.gxt.ui.client.widget.LayoutContainer#wrapWidget(Widget)
 * @see com.extjs.gxt.ui.client.widget.Container#wrapWidget(Widget)
 * @see WidgetComponent#setParent(Widget, Widget)
 */
@PatchClass(WidgetComponent.class)
final class WidgetComponentPatcher {

    /** Private Constructor to prevent Instantiation and appease Checkstyle. */
    private WidgetComponentPatcher() {
    }

    /**
     * Patch {@link WidgetComponent#setParent(Widget, Widget) } to set the {@code parent} on the {@link child}.
     * @param component the component {@link WidgetComponent} to replace the {@code setParent} method on.
     * @param parent the parent {@link Widget}.
     * @param child the child {@link Widget}.
     */
    @PatchMethod
    public static void setParent(final WidgetComponent component, final Widget parent, final Widget child) {
        GwtReflectionUtils.setPrivateFieldValue(child, "parent", parent);
    }
}

Fixes UnsatisfiedLinkError when adding an Image to a Panel using GwtTestWithEasyMock.
Dependencies:

• GXT-2.2.4
• GWT-2.2.0
• gwt-test-utils-0.28.7
• gwt-test-utils-gxt-0.28.7