ObjectSharingTest.java

/*******************************************************************************
 * Copyright (c) 2012 Michael Kutschke.
 * 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:
 *     Michael Kutschke - initial API and implementation
 ******************************************************************************/
package org.eclipse.recommenders.jayes;

import static org.junit.Assert.*;
import static org.junit.Assume.assumeTrue;

import org.eclipse.recommenders.jayes.factor.arraywrapper.DoubleArrayWrapper;
import org.eclipse.recommenders.jayes.util.sharing.CanonicalArrayWrapperManager;
import org.eclipse.recommenders.jayes.util.sharing.CanonicalIntArraySet;
import org.junit.Test;

public class ObjectSharingTest {

    @Test
    public void testCanonicalIntArraySet() {
        int[] a1 = new int[] { 1, 2, 3 };
        int[] a2 = new int[] { 1, 2, 3 };

        assumeTrue(a1 != a2);

        int[] a3 = new int[] { 2, 3, 4 };

        CanonicalIntArraySet sut = new CanonicalIntArraySet();

        sut.add(a1);
        sut.add(a2);
        sut.add(a3);

        assertSame(sut.get(a1), sut.get(a2));
        assertTrue(sut.get(a1) == a1);
        assertNotSame(sut.get(a1), sut.get(a3));

        assertEquals(sut.size(), 2);
        sut.remove(a1);

        assertEquals(sut.size(), 1);

    }

    @Test
    public void testCanonicalArrayWrapperManager() {
        DoubleArrayWrapper a1 = new DoubleArrayWrapper(1, 2, 3);
        DoubleArrayWrapper a2 = new DoubleArrayWrapper(1, 2, 3);

        assumeTrue(a1 != a2);

        DoubleArrayWrapper a3 = new DoubleArrayWrapper(2, 3, 4);

        CanonicalArrayWrapperManager sut = new CanonicalArrayWrapperManager();

        assertSame(sut.getInstance(a1), sut.getInstance(a2));
        assertTrue(sut.getInstance(a1) == a1);
        assertNotSame(sut.getInstance(a1), sut.getInstance(a3));

    }

}