CompareTest.java

/**
 * OpenSpotLight - Open Source IT Governance Platform
 *
 * Copyright (c) 2009, CARAVELATECH CONSULTORIA E TECNOLOGIA EM INFORMATICA LTDA
 * or third-party contributors as indicated by the @author tags or express
 * copyright attribution statements applied by the authors.  All third-party
 * contributions are distributed under license by CARAVELATECH CONSULTORIA E
 * TECNOLOGIA EM INFORMATICA LTDA.
 *
 * This copyrighted material is made available to anyone wishing to use, modify,
 * copy, or redistribute it subject to the terms and conditions of the GNU
 * Lesser General Public License, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 *
 * See the GNU Lesser General Public License  for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this distribution; if not, write to:
 * Free Software Foundation, Inc.
 * 51 Franklin Street, Fifth Floor
 * Boston, MA  02110-1301  USA
 *
 ***********************************************************************
 * OpenSpotLight - Plataforma de Governança de TI de Código Aberto
 *
 * Direitos Autorais Reservados (c) 2009, CARAVELATECH CONSULTORIA E TECNOLOGIA
 * EM INFORMATICA LTDA ou como contribuidores terceiros indicados pela etiqueta
 * @author ou por expressa atribuição de direito autoral declarada e atribuída pelo autor.
 * Todas as contribuições de terceiros estão distribuídas sob licença da
 * CARAVELATECH CONSULTORIA E TECNOLOGIA EM INFORMATICA LTDA.
 *
 * Este programa é software livre; você pode redistribuí-lo e/ou modificá-lo sob os
 * termos da Licença Pública Geral Menor do GNU conforme publicada pela Free Software
 * Foundation.
 *
 * Este programa é distribuído na expectativa de que seja útil, porém, SEM NENHUMA
 * GARANTIA; nem mesmo a garantia implícita de COMERCIABILIDADE OU ADEQUAÇÃO A UMA
 * FINALIDADE ESPECÍFICA. Consulte a Licença Pública Geral Menor do GNU para mais detalhes.
 *
 * Você deve ter recebido uma cópia da Licença Pública Geral Menor do GNU junto com este
 * programa; se não, escreva para:
 * Free Software Foundation, Inc.
 * 51 Franklin Street, Fifth Floor
 * Boston, MA  02110-1301  USA
 */

package org.openspotlight.common.util.test;

import static org.hamcrest.core.Is.is;
import static org.hamcrest.core.IsNot.not;
import static org.junit.Assert.assertThat;
import static org.openspotlight.common.util.Arrays.andOf;
import static org.openspotlight.common.util.Arrays.of;
import static org.openspotlight.common.util.Compare.compareAll;
import static org.openspotlight.common.util.Compare.npeSafeCompare;

import org.junit.Test;

/**
 * Test class for {@link Compare}
 * 
 * @author Luiz Fernando Teston - feu.teston@caravelatech.com
 */
@SuppressWarnings("all")
public class CompareTest {

    @SuppressWarnings("boxing")
    @Test(expected = IllegalStateException.class)
    public void shouldThrowExceptionGettingDifferentParameterSize() {
        compareAll(of(1, 2, 3), andOf(1, 2));
    }

    @Test
    @SuppressWarnings("boxing")
    public void shouldVerifyEquality() {
        assertThat(compareAll(of(1, 2, 3), andOf(1, 2, 3)), is(0));
        assertThat(compareAll(of(1, 2, 5), andOf(1, 2, 3)), is(not(0)));
    }

    @Test
    @SuppressWarnings("boxing")
    public void shouldVerifyEqualityInANullPointerSafeWay() {
        assertThat(npeSafeCompare(null, 1), is(not(0)));
        assertThat(npeSafeCompare(1, null), is(not(0)));
        assertThat(npeSafeCompare(1, 1), is(0));
        assertThat(npeSafeCompare(null, null), is(0));
        assertThat(npeSafeCompare(2, 1), is(not(0)));
    }

    @Test
    @SuppressWarnings("boxing")
    public void shouldWorkWithNonComparables() {
        final Object o1 = new Object();
        final Object o2 = new Object();
        assertThat(o1.equals(o2), is(false));
        assertThat(npeSafeCompare(o1, o2), is(not(0)));
        assertThat(npeSafeCompare(o1, o1), is(0));
    }

    @Test
    @SuppressWarnings("boxing")
    public void shouldWorkWithNulls() {
        assertThat(compareAll(of(1, 2, null), andOf(1, 2, null)), is(0));
        assertThat(compareAll(of(1, 2, null), andOf(1, 2, 3)), is(not(0)));
    }

}