/* ====================================================================
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 2002-2003 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
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 *    distribution.
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 * 3. The end-user documentation included with the redistribution, if
 *    any, must include the following acknowledgement:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowledgement may appear in the software itself,
 *    if and wherever such third-party acknowledgements normally appear.
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 * 4. The names "The Jakarta Project", "Commons", and "Apache Software
 *    Foundation" must not be used to endorse or promote products derived
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 * 5. Products derived from this software may not be called "Apache"
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 * 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/>.
 */
package org.apache.commons.lang;

import java.lang.reflect.Constructor;
import java.lang.reflect.Modifier;

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>
 * @author <a href="mailto:ggregory@seagullsw.com">Gary Gregory</a>
 * @version $Id: ObjectUtilsTest.java,v 1.9 2003/08/18 02:22:25 bayard 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 testConstructor() {
        assertNotNull(new ObjectUtils());
        Constructor[] cons = ObjectUtils.class.getDeclaredConstructors();
        assertEquals(1, cons.length);
        assertEquals(true, Modifier.isPublic(cons[0].getModifiers()));
        assertEquals(true, Modifier.isPublic(ObjectUtils.class.getModifiers()));
        assertEquals(false, Modifier.isFinal(ObjectUtils.class.getModifiers()));
    }
    
    //-----------------------------------------------------------------------
    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(null, ObjectUtils.identityToString(null));
        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));
    }

    public void testAppendIdentityToString() {
        assertEquals(null, ObjectUtils.appendIdentityToString(null, null));
        assertEquals(null, ObjectUtils.appendIdentityToString(new StringBuffer(), null));
        assertEquals(
            "java.lang.String@" + Integer.toHexString(System.identityHashCode(FOO)),
            ObjectUtils.appendIdentityToString(null, FOO).toString());
        assertEquals(
            "java.lang.String@" + Integer.toHexString(System.identityHashCode(FOO)),
            ObjectUtils.appendIdentityToString(new StringBuffer(), FOO).toString());
        Integer val = new Integer(90);
        assertEquals(
            "java.lang.Integer@" + Integer.toHexString(System.identityHashCode(val)),
            ObjectUtils.appendIdentityToString(null, val).toString());
        assertEquals(
            "java.lang.Integer@" + Integer.toHexString(System.identityHashCode(val)),
            ObjectUtils.appendIdentityToString(new StringBuffer(), val).toString());
    }

    public void testToString_Object() {
        assertEquals("", ObjectUtils.toString((Object) null) );
        assertEquals(Boolean.TRUE.toString(), ObjectUtils.toString(Boolean.TRUE) );
    }
            
    public void testToString_ObjectString() {
        assertEquals(BAR, ObjectUtils.toString((Object) null, BAR) );
        assertEquals(Boolean.TRUE.toString(), ObjectUtils.toString(Boolean.TRUE, BAR) );
    }

    public void testNull() {
        assertTrue(ObjectUtils.NULL != null);
        assertTrue(ObjectUtils.NULL instanceof ObjectUtils.Null);
        assertSame(ObjectUtils.NULL, SerializationUtils.clone(ObjectUtils.NULL));
    }

}