package org.apache.commons.lang;

/* ====================================================================
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 2002 The Apache Software Foundation.  All rights
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution, if
 *    any, must include the following acknowlegement:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowlegement may appear in the software itself,
 *    if and wherever such third-party acknowlegements normally appear.
 *
 * 4. The names "The Jakarta Project", "Commons", and "Apache Software
 *    Foundation" must not be used to endorse or promote products derived
 *    from this software without prior written permission. For written
 *    permission, please contact apache@apache.org.
 *
 * 5. Products derived from this software may not be called "Apache"
 *    nor may "Apache" appear in their names without prior written
 *    permission of the Apache Software Foundation.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 */

import junit.framework.Test;
import junit.framework.TestCase;
import junit.framework.TestSuite;
import junit.textui.TestRunner;
/**
 * Unit tests {@link org.apache.commons.lang.ObjectUtils}.
 *
 * @author <a href="mailto:jmcnally@collab.net">John McNally</a>
 * @author <a href="mailto:scolebourne@joda.org">Stephen Colebourne</a>
 * @author <a href="mailto:ridesmet@users.sourceforge.net">Ringo De Smet</a>
 * @version $Id: ObjectUtilsTest.java,v 1.2 2002/09/18 19:49:47 scolebourne Exp $
 */
public class ObjectUtilsTest extends TestCase {
    private static final String FOO = "foo";
    private static final String BAR = "bar";

    public ObjectUtilsTest(String name) {
        super(name);
    }

    public static void main(String[] args) {
        TestRunner.run(suite());
    }

    public static Test suite() {
        TestSuite suite = new TestSuite(ObjectUtilsTest.class);
        suite.setName("ObjectUtils Tests");
        return suite;
    }

    protected void setUp() throws Exception {
        super.setUp();
    }

    protected void tearDown() throws Exception {
        super.tearDown();
    }

    //-----------------------------------------------------------------------

    public void testIsNull() {
        Object o = FOO;
        Object dflt = BAR;
        assertSame("dflt was not returned when o was null", dflt, ObjectUtils.defaultIfNull(null, dflt));
        assertSame("dflt was returned when o was not null", o, ObjectUtils.defaultIfNull(o, dflt));
    }

    public void testEquals() {
        assertTrue("ObjectUtils.equals(null, null) returned false", ObjectUtils.equals(null, null));
        assertTrue("ObjectUtils.equals(\"foo\", null) returned true", !ObjectUtils.equals(FOO, null));
        assertTrue("ObjectUtils.equals(null, \"bar\") returned true", !ObjectUtils.equals(null, BAR));
        assertTrue("ObjectUtils.equals(\"foo\", \"bar\") returned true", !ObjectUtils.equals(FOO, BAR));
        assertTrue("ObjectUtils.equals(\"foo\", \"foo\") returned false", ObjectUtils.equals(FOO, FOO));
    }

    public void testIdentityToString() {
        assertEquals(
            "java.lang.String@" + Integer.toHexString(System.identityHashCode(FOO)),
            ObjectUtils.identityToString(FOO));
        Integer i = new Integer(90);
        assertEquals(
            "java.lang.Integer@" + Integer.toHexString(System.identityHashCode(i)),
            ObjectUtils.identityToString(i));
        assertEquals(null, ObjectUtils.identityToString(null));
    }
}

@@ -3135,17 +3135,17 @@
 ava,v 1.
-2
+3
  2002/09
@@ -3152,16 +3152,16 @@
 /18 
-19:49:47
+20:12:15
  sco
@@ -5184,11 +5184,245 @@
 );%0A    %7D
+%0A%0A    public void testNull() %7B%0A        assertTrue(ObjectUtils.NULL != null);%0A        assertTrue(ObjectUtils.NULL instanceof ObjectUtils.Null);%0A        assertSame(ObjectUtils.NULL, SerializationUtils.clone(ObjectUtils.NULL));%0A    %7D%0A   
 %0A%7D%0A

Add test for Null placeholder singleton