package org.apache.commons.lang.exception;

/* ====================================================================
 * 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;

/**
 * Tests {@link org.apache.commons.lang.exception.ExceptionUtils}.
 *
 * @author <a href="mailto:dlr@finemaltcoding.com">Daniel Rall</a>
 * @since 1.0
 */
public class ExceptionUtilsTestCase extends junit.framework.TestCase
{
    private NestableException nested;
    private Throwable withCause;
    private Throwable withoutCause;

    public ExceptionUtilsTestCase(String name)
    {
        super(name);
    }
    
    public static Test suite()
    {
        return new TestSuite(ExceptionUtilsTestCase.class);
    }

    public void setUp()
    {
        withoutCause = new ExceptionWithoutCause();
        nested = new NestableException(withoutCause);
        withCause = new ExceptionWithCause(nested);
    }

    public void testGetCause()
    {
        assertNull(ExceptionUtils.getCause(withoutCause));
        assertTrue(ExceptionUtils.getCause(nested) == withoutCause);
        assertTrue(ExceptionUtils.getCause(withCause) == nested);
    }

    public void testGetRootCause()
    {
        assertNull(ExceptionUtils.getRootCause(withoutCause));
        assertTrue(ExceptionUtils.getRootCause(withCause) == withoutCause);
        assertTrue(ExceptionUtils.getRootCause(withCause) == withoutCause);
    }

    public void testGetThrowableCount()
    {
        assertEquals(ExceptionUtils.getThrowableCount(null), 0);
    }

    private static class ExceptionWithCause extends Exception
    {
        private Throwable cause;

        public ExceptionWithCause(Throwable cause)
        {
            this.cause = cause;
        }

        public Throwable getCause()
        {
            return cause;
        }
    }

    private static class ExceptionWithoutCause extends Exception
    {
        /**
         * Bogus signature.
         */
        public void getCause()
        {
        }
    }
}

@@ -2933,16 +2933,83 @@
 all%3C/a%3E%0A
+ * @aithor %3Ca href=%22mailto:steven@caswell.name%22%3ESteven Caswell%3C/a%3E%0A
  * @sinc
@@ -4578,39 +4578,35 @@
     
-/**%0A         * Bogus signature.
+public Throwable getCause()
 %0A   
@@ -4614,20 +4614,20 @@
     
- */%0A
+%7B%0A  
         
 publ
@@ -4626,40 +4626,22 @@
     
-public void getCause()%0A        %7B
+  return null;
 %0A   

change getCause() ExceptionWithoutCause static class: - changed signature to match getCause method in JDK 1.4 Exception - changed method to return null