/*******************************************************************************
 * Copyright (c) 2007 Brad Reynolds and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     Brad Reynolds - initial API and implementation
 ******************************************************************************/

package org.eclipse.jface.tests.databinding;

import junit.framework.TestCase;

import org.eclipse.core.databinding.observable.Realm;
import org.eclipse.jface.databinding.conformance.util.RealmTester;
import org.eclipse.jface.databinding.swt.SWTObservables;
import org.eclipse.swt.widgets.Display;

/**
 * Base class that sets the default realm to be the SWT realm.
 * 
 * @since 3.3
 */
public class AbstractDefaultRealmTestCase extends TestCase {
	private Realm previousRealm;

	/**
	 * Sets the default realm to be the realm for the default display.
	 * 
	 * @see junit.framework.TestCase#setUp()
	 */
	protected void setUp() throws Exception {
		super.setUp();

		previousRealm = Realm.getDefault();

		Display display = Display.getCurrent() != null
				&& !Display.getCurrent().isDisposed() ? Display.getCurrent()
				: Display.getDefault();
		RealmTester.setDefault(SWTObservables.getRealm(display));
	}

	/**
	 * Removes the default realm.
	 */
	protected void tearDown() throws Exception {
		super.tearDown();

		RealmTester.setDefault(previousRealm);
	}
}